Logs of selected wells in the coastal plains of Georgia

GEORGIA S'rATE DIVISION OF CONSERVATION
DEPARTMENT OF MINES, MINING AND GEOLOGY GARLAND PEYTON, Director



THE GEOLOGICAL SURVEY

Bulletin Number 74

V,/;

LOGS OF SELECTED WELLS IN THE COASTAL PLAINS OF GEORGIA

by

Esther R. and Paul L. Applin

ATLANTA 1964

LETTER OF TRANSMITTAL
Department of Mines, Mining and Geology
May 4, 1964

His Excellency, Carl E. Sanders Governor of Georgia and Commissioner Ex-Officio State Division of Conservation Atlanta, Georgia

Dear Governor Sanders:

I have the honor to submit herewith Georgia Geological Survey Bulletin No. 74, "Logs of Selected Wells in the Coastal Plain of Georgia" by Esther R. and Paul L. Applin, formerly Geologists of the United States Geological Survey.

This report contains valuable data upon the geology and water-bearing forma-

tions beneath the Coastal Plain of Georgia. These studies of cuttings and cores

I;

of 31 selected wells will be of much use in supplying ground-water information

'.i

needed by cities, industries, well drillers, mine plants and farmers. The geologic

information will be used by geologists who are engaged in the search for oil

and gas in Georgia.

I believe that the publication of this report is another of the valuable contributions to the search for water and oil that we have been privileged to make.

Very respectfully yours,
11
I:

Garland Peyton Director
,

iii

CONTENTS

Page

Introduction ---------------- -------------- ---------------

v

Well Logs ____ -------------------- --------------~--

1

Aikinson County _____ --------------------------- -------------- --------------------- --------------------------- 1 GGS 107 ----------------- ------------------------ -----------------~------------ ----------~------------------- 1

Bacon County ----------------------- ----------------

28

GGS 58 ____ --------------------

-------------------- 2M

Brooks County ------------- --------------GGS 184

32 ------------------~--- 32

Calhoun County ____ -------------------- -------------------------

37

GGS 192 ------------------ ------------------ _______________ ----------------~-------------

37

Camden County ---------------------------------- -------------------

-------------------------- 44

GGS 54

------------------------- ______________ ----~----~----- --------------------------- 44

GGS 153 --~------------------- --------------------------- --------------~----

45 .

Charlton County

--------------- ------~---~ 46

GGS 185 ____ --------------- ----------------------------- --------------~- ---------------~--~---------

46

Clinch County

---------------------------------------- --------------- ------------------------------ 49

GGS 144 ----------

------------------------------------------------ ________________ --~----------- 49

GGS 338 __ -----------------

----------~-

GGS 481. -----------------------------------~---

GGS 496 ------~--- ---~----------

-------------~---------- -------~------------- 65 ----------~-~------------- ---------------------- 69
-------~--~------~-------- 73

Coffee County ---------------------- ------------------------ ------------------------------------------ 86

GGS 468, 509 & 508 ________________ _____________

-----------~---------------~~-----~-- 86

Colquitt County_______

--------------------------- ------------------------- -------------------- 112

GGS 170 ----------------- ------------------------------~-------------~------- -----------------~-------~---~-- 112

J;>ec:atur County _____

------------------------- ------------------------ ------------------------- 120

GGS 55 ___ ---------------~-----------~- --~---------~---~---- ----------------- ------------------

120

GGS 57 --------------------~----'--~--------~ ____________ ----------~-- -----------------------

123

GGS 168 ______________, -----~----------------~-- ---------------~---------~

--------------------- 127

GGS 191 ---~--------

---------------------- --------------------- ------------~---------~-- 132

Early County ------------------------ ------------------------ ----------------------- ------------------------ 186

GGS 121 :-------~--------------------------- --------------~

---------~--------- ----~--------~--- 136

Echols County ____________ -------------------- --------------------------------

--------------- 148

GGS 150 ----~----------------- -------------~----~--------

---------------~-------~----- 148

GGS 158 _--------------~------------- ----------~-GGS 169 -------------------~----~---------

------------------~ ------------~------------ 156 ---------------------~---------~----- 166

GGS 189 ------------------ ______________

---------------------------------- 171

Lowndes County ______c_______ ------------------

------------------------------------------ ---------~-- 183

GGS. 182 ____ --------------------------- --------------------

--------------------------~ 183

Mitchell County ____ ----------------

-----------~-----~ ----------- 186

GGS 109 _ Seminole County --------~------ ------------------------

------~-------~--~ 186 -------------~ ------------ 201

GGS 187

--------------------

--------------------------- ------------------ -- 201

GGS 204. ____

-------------

---------~--------------------~------------ 204

Thomas County -------

----------------

---------------

______ 208

GGS 19 ---------------- ---------------------

------------~--------------------------- --------------------- 208

GGS 56

------------------------------------------------------ ------------------------------ ___________ 212

GGS 59 ----------------"------

----------------- ____________

------------------~ 216

Wayne County -------------

--------------------------

----------------------------- 220

GGS 52 ____________________ ------------------ --------------- -------------------------~------~---

_______ 220

' '

i'

LOGS OF SELECTED WELLS IN THE

COASTAL PLAIN OF GEORGIA

By Esther R. Applin

Introduction
This report contains lithologic and paleontologic descriptions of cuttings and cores from 31 selected wells in the Coastal Plain of Georgia. These descriptive logs are based on microscopic studies made periodically from 1937 to 1962. Prior to my employment with the U.S. Geological Survey, the studies were on a commercial basis, but thereafter they were part of the regional investigations of the U.S. Geological Survey relating to stratigraphy and structure of Mesozoic rocks in the subsurface of the southeastern Gulf and Atlantic Coastal Plain. The logs of 21 oil tests deal chiefly with Cretaceous and older sedimentary rocks, and only incidentally with overlying Tertiary rocks; the other logs describe the Eocene and younger rocks penetrated in relatively shallow water wells. Microscopic study of the samples of the Cretaceous rocks provided a part of the basic data for reports by PaulL, Applin and Esther R. Applin that have been published by the U.S. Geological Survey. After retirement from the Federal Survey, I was requested by the Director of the Georgia Geological Survey to prepare logs of significent wells for publication. The original descriptions of the cuttings and cores from the wells were, in many instances, abbreviated notes, and the work of putting them into readable form fell 'to my husband, Paul L. Applin:

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LOGS OF SELEC:;1'~ WELLS IN THE COASTAL PLAIN OF GEORGIA

1

ATKINSON COUNTY

Operator': Sun Oil Company Landowne,r: Doster-Ladson Well 1
Location: Land District 7, Land Lot 71 1650 ft. north and 660 ft. east of ,southwest 'corner of Land Lot 71.

GGS. No. 107 Elevation: 222 ft. (derrick
floor)
Total depth: 4296 ft. Completed: Jan. 30, 1945

Summary of Stratigraphy

Depth Thickness

(feet)

( fe e t )

Tertiary

Miocene undifferentiated

90

180

Oligocene

(1st sample) . 170

upper, Suwannee Limestone __'_:________________________________ 270

middle and lower, Vicksburg Group

~

390 _c_



..

.,

.

Eocene ~

,

..,.. - -~- - -- ------ -- --"'-

120 50
1340

upper, Ocala Limestone, upper member

440

130

lower member_________________ 570

210

middle, upper middle, Tallahassee Limestone ( 1)___ 780

90

.., .upper middle (?) or lower middle (?)

870

. 90

lower middle, Lake City Limestone__ _________ 960

500

lower, beds of Wilcox 'age

. 1460

320

. "

Paleocene .:.

~

0________

24

Clayton Limestone

~

1780

24

Cretaceous Gulf

Beds of Navarro age---~---__~C"------------------------------- 1804

Beds of Taylor age

"

~------------------- 2447

Beds of Austin age ., .

.: 2798

Atkinson Formation, upper member

:...__ 3135

~

,

lower member ~

~__ 3723

Comanche undifferentiated

3870

2066
643 351 337 588 147 350

Pre-Cretaceous

Igneous rocks

.,

..

Lithologic and paleontologic description of cores and cuttings. Samples are cuttings unless otherwise stated.

to '4220 total 76 . . depth

_J
.'

2

-" " ,, - GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
0- 90
90- 100 ' 100- 270

Description
No samples
Tertiary
Miocene Series undifferentiated
Sandstone, quartz; composed of moderately fine to coarse, rounded grains; contains nodules of white sandy clay. ,. .
Samples of the Miocene rocks were not studied in detail, but consist , mainly, of sa ndst ones and sandy limestones containing phosphatic material.

Oligocene Series

Upper Oligocene. Suwannee Limestone.

270- 280 280- 290
,290- 300 300- 310 310- 380
380- 390

Chalk, white, non-sandy.

Lim estone, white, m oderately hard, porous; composed mainly, of masses of poorly preserved molds of microfossils, including speci mens of Cosk in olina [loridoma:

Limestone, like sample at . 280-290 ft., but more dense; sp ecim ens of Coskinolina fl oridana common.

Like sample at 290-300 ft ; contains specimens of Quinqueloculina

letm ensis.

,

-

Limestone, white, chalky, calcitic, microfossiliferous, irregularly

porous; contains many specim ens of Coskinolina floridana: and

_ other species of Foraminifera common in the Suwannee lim es ton e.

Limestone, cr eam ; compo sed of roll ed, us ually well-rounded mold s of microfossils and f ragments of f ossiliferous limestone; Cos-
i , , kin olin a fl oridana comm on.

390- 400
400-41 0 410- 420
420- 430 430- 440

Middle and Lower Oligocene. Vick sburg Group.
Limestone, cream and white, hard, nodular, irregularly porous ; contains abundant traces of poorly preserved mi crofossil s and fragments of molds of macrofossils. Many calcitized fragments 'of echinoids are present. Sample contains numerous fragm ents of white chert.
Like sample at 390-400 f eet. Sample contains molds of Op erculi- n oides, sp.
Like s~mple at 400-410 ft., bu t f ossil material is better preserved.
Species of Foraminifera identified are: worn specimens Op erculinoides sp. , L epid ocy clina mantelli, and Gypsina globula. Speci m ens of Coskinolina flo ridana are present, but are possibly not indigenous .
Like sample at 410-420 ft; contains poorly preserved specimens of other species of L epidocyclina common to the Vicksburg of this area .-
No sample

$!

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

3

Depth (feet)
440- 470
470- 570

Description

Eocene Series Upper Eocene. Ocala Limestone. Upper Member.

Lithology and fauna of three 10-foot samples are, in general, like

sample at 420-430 ft. but show the introduction of fragments of

a more chalky, highly fossiliferous limestone, and worn speci-

mens of Operculinaides [loridana and Astcrocyclina georgianaj

at 460-470 ft. specimens of Ps eudophrturmina citrensis are pres-

ent.

Coquina, light-cream; composed of worn and fragmentary molds of

microfossils, mainly Operculinoides ocalanns, several varieties

of Lepidoc;yclil1a ocalana, Asterocyclina ge01'giana, and other

Ocala species. Highest occurrence of H eteroeteqina ocalana is

in the sample at 510-520 ft.

.

Upper Eocene. Ocala Limestone. Lower Member.

570- 580 " . Lithology and fauna ' are, in general, like the samples at 470-570 ft, but this sample contains specimens of Amphistegina pi1mrensii cosdeni, marking the top of the lower member of the Ocala Limestone.

580- 600

Limestone, cream, dolomitic, cryptocrystalline. No identifiable indigenous fossils were observed, although ' traces of fossil molds occur in the limestone; the sample contains fossils that are evidently caving from higher levels.

. 600- 660

Samples in this interval are, in general, about 50 percent cream, porous, pitted, cryptocrystalline to very finely granular limestone, and 50 percent fine to moderately coarse grained quartz sand which may be caving.

660- 670

Limestone, white and light-cream, unfossiliferous, in part chalky and in part dolomitic; about 25 percent of the sample is composed of fine to ~oarse, rounded grains of quartz sand.

670- 720

Samples in this interval are like the sample at 660-670 ft., but contain seemingly indigenous specimens of L epidocuolina sp., and chalky ' specimens of Amphistegina pinarensis cosd eni.

722- 729

Core 1. Recovery 3 ft. Limestone, white to cream, porous, irregularly chalky, and finely
dolomitic; contains many sections of small miliolids and traces of impressions of other microfossils. ,

720- 780

Samples in this interval are composed of limestone like the core at 722-729 ft. and contain specimens of Amphistegina pina1'ensis cosdeni and poorly preserved specimens of L epidocyclina sp.

780- 810

Middle Eocene. Upper Middle Eocene. Tallahassee Limestone (?) equivalent.
Samples in this interval are composed of limestone like the samples at 720-780 ft. and contain, in addition, fragments of white,

4
Depth (feet)
810- 820
820- 830
830-840 840- 850
I
843- 858 850- 870

GEORGIA GEOWGICAL S ,URVEY BULLETIN 74

Description

gray-spotted chalky lim estone composed mainly of masses of

chalky molds of Foraminifera and fragm ents of molds of macro-

fo ssils. Fragments and poorly preserved molds of at least two

sp ecies of L epidocyclina, worn molds of specim ens of Operculi-

noides, sp., and specime ns of A rnphistegina pinarensis cosdeni

are present in the gray-spotted limestone.

.

Limeston e, white, g r ay-spotted 'f ossilif er ous, like samples at 780-

810 f t., but t he fo ssil material consists of worn 'and rolled molds.

Fossils present are secti ons of sma ll miliolids, specimens of

L epidocyclina cf . L . pI.lstulosa, Operculin oides sp., Valvulina sp.,

and ,a few specimens of A 1nphistegina pinarensis cosdeni.

Limestone, wh ite, gray-spotted, porous, in part cha lky and in part dolomitic; composed of a mass of worn and fragmental fossil material, in wh ich the fo ssil s are mostly too poorly preserved for identification. However, the fauna seems to be similar to that in the sample at 810-820 ft.

Limestone, like the sample at 820-830 ft., but more indurated and .t he fossil material is less well preserved.

Limestone, gray-spotted, chalky and dolomitic; contains bryozoan fragments and vague traces of "other fossils.

Core 2. Recovery 2 ft. , Limestone, white, gray-spotted, porous; ,co;nposed of a mass of
molds of small miliolids and fragments of other microfossils..

Two 10-foot samples composed of material like the core at 843-858

ft.

'

870- 880 880- 890
890- 900 ' 900- 910 910- 930

Middle Eocene. Upper ,Middle ( ? ) , or, Lower Middle( 7) Eocene.

Lime stone, chalky, 50 percent of sample; similar to samples at 850-870 ft., but only slightly gray-spotted. Fine to coarse rounded grains of clear quartz sand compose 50 percent of sample.

Limestone, cream, in part dolomitic, .high ly fossiliferous; contains

sp ecimens of Fab ianina cubensis, Operculin oides, sp ., and several

sp ecies of L epidocy clina ; about 25"percent of sample is sand like

that ~n sample at 870-880 ft.

''

Limestone, white and buff, hi ghly dolomitic, somewhat chalky, 50

percent of sample. The dolomite is finely granular. Sand is ~O

percent of the sample.

"

Limestone, like sample at 890-900 ft., is about 75 percent of sample; sand is 25 percent" of sample.

Limestone, buff, finel y granular, dolomi tic ; contains scattered

chalky areas and selenite. Fossils present are chalky mold s and

fragments of L epid ocyclina sp -" Operculinoides sp. , and algal

nodules.

~

-,.4

"-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

5

Depth (feet)
930- 960

Description
Dolomite, light-buff, finel~ giari~l~r; ~oritain s small' chalky areas, specimens of two species or" Lep'idoCyeli-i/n,. and irregular-shaped
chalky nodules that are probably of algal 'or igin .

Middle Eocene. ' Lower Middle Eocene.

960-1000

Lake City Limestone.
-"
Samples in this interval are similar to those at,930-960 ft., but are

somewhat glauconitic and contain large inclusions of selenite. ';' " Sample at 970-980 ft. contains specimens of Discocuclina (Aster.()~

- t : . ',;" , ' J " ey elina) monticellensis and numerous fra,gments of several spe" cies of bryozoa. ' , , , ,' " ' ,

1000-1060

Limestone, chalky, somewhat dolomitic; gypsum is , common: glau-

"conite is rare. Samples contain specimens of Discoeyclina " . : (Ast~oeyelina) .montieellens is, L epidocyelina sp., and numerous

fragments of bryozoa. Sample at 1,020-1030 ft. contains speci-

mens of A,mphistegina lopeztrigoi var. '

.

."

1060-1100 1<,; Limestone, buff, irregularly chalky, finely dolomitic, somewhat
glauconitic; contains abundant fragments of bryozoa, two species of echinoids, numerous specimens of several species of L epido-
,'" ," . " :1"., cuclino. including numerous specimens of L. (Poiulepidino.} antil' ~eQ;, and a few f,ragments of .pfs()oe.1!clina sp,

1100-1140
"

Limestone, white, finely fragmental, slightly glauconitic, fossili-

ferous; contains abundant fragments. of bryozoa, many speci-

mens of Diseoeyelina (Asteroeyclina) monticellensis and Opercu-

, _'! ," linoid es sp, and poorly preserved molds of smaller Foraminifera.

.Samples also contains "fragments of .buff, granular crystalline dolomite (which ~ay be .caving ) , and iragmE;nts of light-gray

chert.

\ " It',

Like the samples at ,1100-1140 ft., .but Operclilinoides sp, is the dominant foraminiferal species, and most ~:i the remaining fossil

material is very finely fragmental;' specimen's of Discocuelina

sp. are also-present,

il60-1180
, .,J " .

Limestone, white, chalky, slightly glauconitic,' containing very finely fragmented fossil material. Specimens of Operculino<ides sp., Cibicides sp., and a few other species of smaller Foraminifera 'are present.

1180-1240 ' .. ' Samples ' in this interval are lithologically and faunally similar to

":" .

the samples at 1160-1180 ft. The samples contain cavings from

higher levels 'a nd about 25 percent fine to coarse-grained clear

quartz sand"that may al so be caving.

1240-1250

Limestone, light-cream, 'cha lky, slightly dolomitic, finely fragment' ed. Fossil ~aterial consists of a few specimens of small Fora-
minifera, Discocyclina sp., Operoulinoides (?) sp., and other fossils obviously 'ca ving from higher levels. Sample cont~ins'abou"t
25 percent fine to coarse-grained quartz sand.

6

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Descriptlon

1250-1290

Samples in this interval are similar to the sample at 12401250 ft., and samples from 1270-1290 ft. contain numerous fragments of light-gray chert.

1290-1300

Dolomite, buff, slightly chalky, finely granular, porous; many fragments of brownish-gray chert; a few fossils that probably

are not indigenous.

c-'

1300-1350

Dolomite, like sample at 1290-1300 ft., but somewhat' firay-spot t ed and slightly porous.

1350-1360

Limestone, soft, chalky; contains a little fine-grained sand, many fragments of L epidocyclina (?) sp. , some fragments of Gamerina I!Ip., and many specimens of Lepido-cyclina (Polylepidina) antillea.

1360-1390

Limestone, chalky and dolomitic, somewhat glauconitic, slightly sandy (fine-grained sand). Brownish-gray chert is present but may be caving. Fauna is like sample at 1350-1360 ft.

1390-1430

Limestone, chalky, fossiliferous, and many fragments of grayishbrown finely granular, crystalline dolomite. The samples contain fragments of brownish-gray chert-like the samples at 13601390 ft.

1430-1460

Limestone, soft, chalky, finely fragmental, and fragments of dolo-

mitic limestone like the samples at 1360-1390 it; abundant speci-

-~

mens of L epidocyclina (P<Jlylepidina) antillei:t:.
.'

Lower Eocene. Beds of Wilcox age.

1460-1500 1500-1510 1510-1520 1520-1530
1530-1540 1540-1550

Samples in this interval are not satisfactory for precise description; they are seemingly like the samples at 1430-1460 ft. , but are highly glauconitic.
Core 3. Recovery .l ff. Clay, light brownish to -greenish-gray, chalky, glauconitic; contains numerous specimens of Asterigerina sp, that seem to be indigenous.
Limestone, white, chalky, microfossiliferous. Sample is lithologically and faunally like samples from higher levels, and may not be representative of the rocks penetrated at this depth.
Limestone, moderately, hard, chalky, fossiliferous, glauconitic; contains many bryozoan fragments, and fragments of a number of species of Lepidocyclina that are probably caving, because they are similar to some observed at higher levels. Many fragments of pink-stained, glauconitic limestone. The sample is probably from the Salt Mountain Limestone, the top of which is at 1483 ft. on the electric log of the well.
Limestone, pink-stained, hard, somewhat glauconitic; contains many fragments of bryozoa;
Limestone, white, slightly pink-stained, hard, somewhat glauconitic ; lithologically and faunally like the sample at 1530-1540 ft.

"I

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

7

D eptb (feet) 1550~1560
1560-1610
1610-1620 1620- ? 1640-1650 1650-1680
, 1680-1750
1750-1770 1770-1780

Description

Limestone, like the sample at 1540-1550 ft., but this sample contains fragments of a coarsely sandylimestone and a few fragments of Peeudophmurmina. (?). '

Limestone, white, dense, som ewhat glauconitic; contains scattered coarse grains of sand and a few poorly preserved specimens of Discocyclina? , sp. The , samples at 1590-1610 ft. contain wonl:
and broken fragments of Ostrea gP., and unconsolidated coarse-
grained quartz sand.

Limestone, soft, chalky, arid a Iittle coarse-grained sand.

Limestone, cream, dense, showing many sections of fragmental fos sil material.

Limestone, cream, gray-spotted, hard, dense, showing abundant sections of fragmental fossil material.

Sandstone, white, very fine and even- g r a in ed, somewhat glauco-

nitic, micaceous, irregularly chalky; contains traces of fossil

fragments.

"

Sandstone, very fine , grained, glauconitic, micaceous, cal careous; contains many fragments of fo ssil bivalves and some bryozoan fragments.

Sand, unconsolidated, very fine and even-grained, that seemingly, was deposited in a matrix of soft gray calcareous clay.

Sample unwashed but seems to be like the samples at 1750-1770; contains cavings from higher levels.

1780-1790 1790-1800 1800-1810
1810-1820

Paleocene( ?) Series
Clayton' Limestone(?)
Limestone, white, hard, dense, glauconitic ; contains poorly preserved fragments of fossils, including bryozoa. Paleontologic data are lacking on which to base the Paleocene age of the limestone. On the basis of electric log characteristics, the top of the lim estone is at 1777 'ft.
Sandst on e, very fine and even-grained, somewhat micaceous, slightly glauconitic, calcareous; contains fragments of macrofossils. Sample al so contains fragments of limestone like that in sample at 1780-1790 ft.
Limestone, cream, hard, irregularly sandy; contains many fragm ents of poorly preserved macrofossils and traces of sp ecimens of Foraminifera.
Cretaceous
Gulf Series
Bed s of Navarro age
Sample seems to , be mainly cavi ngs but contains specimens of species of Foraminifera that are characteristic of the beds of

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description-

.; ' ,
i820':1830

Navarro age: The top of the beds of Navarro age is placed at

"l804ft. on the basis of electric log characteristics.

"

Limestone and calcareous sandstone like samples at 1780-1810 ft.

1830-1850 Clay, brownish-gray, finely sandy, somewhat carbonaceous and

i . micaceous.

..

.

t.850;1~70, ~" , Sandstone, grayish-brown, very fine grained, ~rgillacrous, mica-

o ceous, somewhat carbonaceous; and fragments. of dark brownish-

gray soft flaky clay. Sample at 1860-1870 ft. contains specimens

.. , of Robulue navarroensis.

'o~ ""

1870-1890
Ao ' : , . ~

Clay, 'gr ay, soft, flaky, micaceous,' and -;rgillaceous sandstone. Chalky fragments of fossils at 1880-1890 ft. ' .

1890-201Q

Clay, gray, soft, micaceous" somewhat " c~l~bonaceous, and dark

brownish-gray, very fine grained, argillaceous, micaceous, car':

bonaceous sandstone. A f ew chalky fragments in the clay seem "

to be remnants of fossil shells. Sample contains small' nodular

fragments of gray limestone.

" ' "'

2010-2020
:\
,'
2020-2030 "

Core 4. Recovery 10 ft.

Top 5 ft. sandstone, gray, very fine ' and even-grained, argilla-

, ceous, micaceous; contains specimens of Robulu8 navarroensis, Globotrltncana cretac ea, and a few other sp ecimens of species

. char a ct er fst ic of the Navarro, Bottom '5 ft. clay, gray, mica"

ceous j contains much fine-grained sand.

"'

Sandstone, gray, very fine grained, argillaceous; ' micaceous, and

fragments of light-gray, moderately hard;very fin e grained, calcareous, micaceous sandstone. Sp ecim ens of Robulu8 nwvarr.oensis are fairly common in . the sample.

2030-2040

Sandstone, ligh,t-gray, soft, very fine and even grained, chalky.

2040-2050 .-;-
2045-2055

Sandstone, "da r k-g r ay, soft, fine-grained, argillaceous, micaceous,
Core 5. RecoveryTO ft. Top 5 ft. Sandstone, light-gray, soft, very fine grained, micaceous, calcareous. Bottom 5 ft. No change.

2050-2060 ,

Sandstone, gray, soft, very fine grained" argillaceous, micaceous j contains a few specimens of foraminiferal species indicative of the Navarro age of the beds .

2060-2100
"0

Sandstone, like the sample at 2050-2060 ft. Some of the samples

", in this interval -show fragments of white; mod erately hard, very

fine grained, calcareous sandstone that seems to occur as len ses

in the gray, soft argillaceous sandstone.

~

2100-2110

Core 6. Recovery 10 ft. Top 5 ft. clay, gray, soft, sandy (fine-grained sand), micaceous. Bottom 5 ft. sandstone, gray, moderately soft, very fine grained, micaceous, calcareous, finely carbonaceous.

2100-2150

Clay and sandstone as des cribed in core at 2100-2110 ft.

,. .

Th~ ' ~amples contain specimens of Rob~lu8 n:avarroensis , and a

-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

9

Depth (feet)
2150-2160
2150-2200
2200-2210 2200-2300 2310-2317 2317-2327 2327-2337
2337-2347, 2347-2357
2357-2367
2367~2377
2377-2387 2387-2397 2397-2407
2400-2410

Description

f ew other foraminiferal species characteristic of the beds of Navarro age.

Core 7. Recovery 10 ft. Top and ' bottom. Clay, gray, moderately hard, highly sandy

(v ery f ine grained sand), micaceous; contains small fragments

of carbonaceous material.

Sandstone, gray, soft, very fine grained, argillaceous, micaceous, somewhat finely carbonaceous; contains specimens of Globigerina eretaeca and a few other Species of .Foraminifera charac-

teristic of bed s of Late Cr etaceous a ge.

Core 8. Recovery 5 ft. No sample.

Samples in this interval were unwashed but seem to consist of

gray, highly sandy, micaceous clay; fossils, if present, were not

vi sible.

'

.

Cor e 9. Recovery 7 ft. Clay, gray, sandy (fine-grained sand), micaceous; contains small

fragments of carbonaceous material,

Core 10 . Recovery O.

Core 11. Recovery 10 ft. Top, sandstone, gray, moderately spit, very fine grained, argil-

laceous, micaceous.

Middle and bottom. Like the top part of the core.

Core 12 . Recovery 10 ft.

.

Like core 11, at 2327-2337 ft.

Core 13. Recovery 10 ft.

Top 3 ft. like core 12 at 2337-2347 ft. A few fragments of . Robul.ussp. in the core.

Middle 4 ft. and bottom 3 ft. No change. Core 14. Recov ery 6 ft.
Top 2 ft. and bottom 4 it. Like core 13 at 2347-2357 ft.

Cor e 15. Recovery 10 ft. Top. Clay, gray, moderately hard, sandy (fine-grained sand) ,

mica ceous, somewhat carbonaceous. Bottom. Clay, like top part

of core; containing in clu sions of light-gray, ca lca re ous , somewhat glauconitic sandstone.

Core 16. Recovery O.

Core 17. Recovery O.

Core 18. Recovery 3 ft. Clay, gray, sandy (fine-grained sand ), micaceous. Spe cimens of Ostracodes and Foraminifera are fairly common in the sample,

but no 'diag nostic speci es were seen. Clay, gray, highly sandy, mica ceous. Specimens of Foraminifera

identified are: Globot1"1.mcana area, Globotruncana [ornicata, Dorothia bull etta, Robulus spp. Ano-malina pinguis , Clavulin cri.des trilaterus, Bulimina aspera, Ps eudoteetutaria eleqoms, Th e sample contains many ostracodes. The fauna is ' Navarro in char-

acter.

10
Depth (feet)
2407-2417
2410-2420
2417-2427 2420-2430 2427-2437 2430-2440 2437-2447 2440-2450
2447 -2457
2450-2460
2457-2467 2460-2470 2467-2477
2470-2480
2477-2487 2480-2490 2487-2497
2490-2500
2497-2507

>
GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Core 19. Recovery 4 ft. Clay, gray, very highly sandy (very fine grained sand), micaceous, calcareous, somewhat finely carbonaceous.
Clay, gray, sandy, micaceous; contains numerous specimens of Foraminifera and ostracodes. The fauna is Navarro in character.
Core 20. Recovery 3 ft. Like core 19, at 2407-2417 ft.
Like sample at 2410-2420 ft. Core 21. Recovery O. Like sample at 2410-2420 ft. Core 22. Recovery lh ft.
No sample. Like sample at 2410-2420 ft.
Beds of Taylor age.
Core 23. Recovery 10 ft. Marl, light-gray, finely micaceous. Foraminiferal fauna includes specimens of Planulina dumblei, Bolivina cretoea, Planulina spis80CQstata, Bolivinoides deeorata, Dorothia grab ella.
Clay, light-gray, soft, sandy, micaceous, calcareous. Foraminiferal fauna is like core 23 at 2447-2457 ft. and contains, in addition, many specimens of Clavnlinoides n, sp,
Core 24. Recovery O. Like sample at 2450-2460 ft. Specimens of Doroihia cf, D. stephen-
soni are added to the fauna. Core 25. Recovery 4 ft.
Clay, light-gray, highly sandy (very fine grained sand), micaceous , glauconitic (fine grains), calcareous. Clay, gray, soft, highly sandy (very fine grained sand), micaceous, calcareous. Fauna like that described in preceding samples from beds of Taylor age. Core 26. Recovery O. Like sample at 2470-2480 ft. Fragments of Inoceramus present. Core 27. Recovery 1 ft. Clay, moderately hard, highly sandy (extremely fine grained sand), micaceous, calcareous. Lithology and fauna like that described in preceding samples from beds of Taylor age, with the addition to the fauna of many specimens of Stensioina am ericana and Planulina dumb lei. Core 28. Recovery 10 ft. Top. Like core 27 at 2787-2797 ft; Inoceramus fragments abundant. Bottom. No change.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

11

D epth (feet )
2500-2510 2507-2517
2510-2520 2517-2527
2520-2530
2527-25 37
2530-2540 253 7-25 47
2547-2557 2550-2560 2557-25 67
2560-2570
2567-2577 2570-2580 2577-2582
2580-2599 2582-2588 2588-2598

Description

Like sample at 2490-2500 ft; contains a few Inoceramus fragments.
Core 29. Recovery 10 ft. Top. Clay, gray, highly sandy (extremely fi ne g ra ined sand), micaceous, calcareous, contains small shr eds of ca r bona ceous material: Bottom. No change .

Like sample at 2500-2510 ft.

Cor e 30. Recovery 10 ft.

Sandstone, gray, very fine gr ained, argillaceous, mi caceous,

calcareous.

Li th ology and fauna like that described in preceding cutting sa m-

ples from beds of Taylor a ge; some fragm ents of Inocera mus

present.

'

Core 31. Recovery 10 ft. Clay, gray, highly sandy (extremely fine grained sand ), micaceous, calcareous.
Sandstone, .g r a y, argillaceous, mi caceous, calcareous. Microfauna is the same as in the preceding 100 fe et of samples.

Cor e 32. Recovery 5 ft. Top. CIa}', g ray, hi ghly sa ndy (very fin e grained sand ), micaceous , calca r eous. Bott om, no change.

Clay, gray, hi ghly sandy (fine-grained sand) mi caceous. Specimens

of F oraminifera are much less c0rtmon than in preceding samples of beds o f Taylor age.

Core 33. Recovery 10 ft. Like core 32 at 2537-2547 ft.

Lik e cut t ing sample a~ 2540-2550 ft.

Core 34. Recovery .a ft. Clay, light-gray, sandy (fine-grained sand), mi caceous, cal-

cercus.

Clay, light-gray, sandy (v ery fine grained sand ) , mi cac eou s, cal-

careous. Sample contains a f ew nondlagnost ic sp ecies of F ora-

minifera.

.

Core 35. Recovery O. Like cutting sample a t 2560-2570 ft.

Core 36. Recovery 4 ft. Clay, gray, highly sandy (fine-grained sand ), micac eous, calcareous, and sof t , argillaceous, very fine grain~d, mi cac eou s sandstone.
Clay, g ray, sandy, micaceous, somewhat f ossiliferous.

Core 37. Recovery 6 f t. Like core 36 at 2577-2582 ft.
Core 38. Recovery 5 ft.

12

GEORGIA GEOLOGICAL SURVEY B ULLETIN 74

Depth (feet)

Description

2590-2600

Top,' clay, gray, highly sandy (very fine grained sand), mica-

ceous, calcareous.

Bottom. No changes . -

.

Clay, gray , sandy (very fine-grained sand), micaceous, calcareous.

Sample contains a f ew sp ecimens ot Foraminifera like those at

higher levels in the beds of Taylor age.

"-

2598-2 608

Cor e 29. Recovery 3 ft. Top. Clay, gray, sandy calcareous: Bottom. No change.

(very fine-grained

sand),

micaceous,

2600-2610

Sh al e, gray, soft, fl aky, micaceous ; some fragments of gray sandy, micaceous clay, and light-gray, very fine grained cal careous sandstone.

2608-2 618

Core 40. Recovery 4'-h ft. Like core 39 at 2598-2608 ft. and somewhat carbonaceous.

2610-2620

Like cutting sample at 2600-2610 ft; contains f ew specimens of Foraminifera.

2618-2628

Cor e 41. Recovery 6 ft. , Top. Clay, gray, highly sandy (fine-grained sand), micaceous .
Bottom, Shale, gray, thinly-laminated, calcareous.

2620-26 30

Clay, gray, sandy, micaceous, and some fragments of gray, soft, flaky, micaceous shale.

2628-26 38

Core 42. Recovery 10 ft.

Top 8 ft. clay, gray, sa ndy (extremely..fine-grained sand), cal,

careous; gray micaceous clay; and 't hin lenses of gray mica-

ceous shale: The core fr agment studied contains traces of macro-

fossils.

'

..

Bottom 2 ft. Shale, browni sh- gray, micaceous, containing irregu-

lar inclusions of white, chalky, glauconitic, micaceous sandstone.

2630-2640

Cuttings of materials like the bottom of core 42 at 2628-2638 ft.

2638-2648

Core 43. Recovery 7 ft.

Shale, dark brownish-gray, micaceous, somewhat carbonaceous,

containing irregular streaks of light-gray, argillaceous, mica-

ceous, slightly glauconitic, calcareous sandstone.

.

2640-2650

Clay, gray, soft, sandy (fine-grained sand), micaceous; contains very few specimens of Foraminifera, and no diagnostic spe cies.

2648-2658

Core 44. Recovery 7 ft.

"

Clay, dark, ' brownish-gray, sandy (ve'ry fine grained sand),

micaceous, somewhat carbonaceous.

2650-2660 Like core 44 at 2648-2658 ft; contains a few, nondiagnostic specimens of Foraminifera.

2658-2668

Core 45. Recovery 9 ft. Clay, gray, highly sandy (fine-grained sand), highly micaceous, containing small shreds of carbonaceous material.

2660-2670

Like core 45 at 2658"266'8 ft.; contains few specimens of : Fora-

minifera.

r,

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN: OF GEORGIA

13,

",

';

Depth (fe et)

Description'

2668-2678

Core 46. Recovery 6 ft.

.' ", l

Top. Like core ~5 a,t 2658-266l;l ft. ' , '.

, Bottom.. Clay, gray, irregularly.sandy ,(f ine-:g r ained sand), mica-

ceous.

2670-2680

Like core 46 at 2668-2678 ft.

2678-2688
.; --
2680-2690

Core 47. Recovery 2 ft.

Clay, dark-gray, shaly, irregularly sandy (fine-grained . sand),

, micaceous.

',..: ;

Like core 47 at 2678-2688 ft. .,

2688-2698

Core 48. Recov ery 5 ft. Like core 47 at 2678-2688 ft.

2690-2700 ' . 2698-2708

' Like Core' 48 at 2688-2698 ft. '
Core 49. Recovery 6 it. '('nay, gray, irregularly sandy. (very fine grained sand) , micaceous,

2700-2710

Like core 49 'at 2698-2708 ft.

2708-2716

Core 50. Recovery 3 ft. Like core 49 at 2698-2708 ft.

2710-2720 2'716-2728
r
272Q-2730

Like core 50 at 2708-2716 ft.

~. .

: t

. Core 51. Recovery 7 ,ft. '

C}ay, dark brownish-gray, shaly, irregularly sandy

.grained sand ), micaceous. :

Like core 51 at 2716-2728 ft. : . ' _

(very fine

2728-2738

Core 52. Recovery 3 ft.
Clay, dark brownish-gray, micaceous,' .

2730~2740

No cutting sample;

2738-2748 2740-2750'

Core 53. Recovery 6 ft.

Top. Like core 52 at 2728-2738 ''ft. bu.'i irregularly sandy (fine-

grained sand},

r,

'

>,

Bottom. Clay, like, top part, but containing irregular in clusions

, of , light-gray, argillaceous: 'm ica ceous; calcareou s, very fine

grained sandstone.

"! .

,

....

. . ..

"

'.

' l i ..... I

Like core 53 at 2738-2748 ~t; 'i

27:48-2758

Core, 5,4. Recovery, 5 ft. Like core ,53 at 2738-2748 ft.

2750~2760 ,1 Like cor e 54 at 2748-2758 ft. I! '

2758-2768

Core 55. ' Recovery 5 ft. ' Clay, -dark brownish-gray, irregularly sandy (fine-grained sand), micaceous.

2760-2770

No cutting sample.

2768-2778

Core 56. Recovery ih ft.

,

Clay, like c'or e 55 at 2758~2768 ft., containing .Ir reg ula r areas of

, ,

' li gh t-g r ay" micaceous, highly sandy .(f ine-g r a ined sand) clay.

.'

' .



.~

.



.'



. . . ..

-

#' -





-

2770-2780

Like core 56 at 2768-2778 ft.

- .;

14

G:P::ORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
2778-2788
2780-2790 2788-2798 2790-2800
2798-2803

Description,

Core 57. Recovery 5 ft.

-' ,

Shale, dark brownish-gray, occurring in thin lenses; and dark-

, gray,. micaceous, sandy (fine-grained sand) clay.

Like 'core 57 at 2778-2788 ft.

Core 58. Recovery 7 ft. No sample.

'"
., c

Clay, brownish-gray, containing small flakes of mica; very fine and even-grained, micaceou s, calcareous, somewhat glauconitic sandstone. The sample contains a few moderately large nodules of dark-green glauconite. Sp ecimens of Foraminifera are present, but not abundant, and species are not diagnostic; Globotruncana '[orn icata. com mon ; GloboTotalites conicu8 present.

Core 59. Recovery 2 ft. Top foot. Shale, brownish-gray, flaky, containing small flakes of mica and a ' few nodules of dark-green glauconite. Specimens of non-diagnostic species of F'oraminifera are present.

,. t, , . . ",g,
Beds of Austin ? age.

Bottom foot. Shale, brownish-gray, flaky, micaceous, containing irregular streaks and inclusions of fine-grained,' chalky, highly glauconitic sand. Chalky character of sand due to small fragments of microfossiliferous material and Inoceramus prisms..

2800-2810

Shale, brownish-gray, flaky, micaceous, and very fine grained, micaceous sandstone containing some small grains of glauconite.

2803-2813

Core 60. Recovery 10 ft. 3d and 4th f eet , Marl, light-gray, chalky; micaceous, containing many small black phosphatic nodules, some fragments of fish
. , scal es, and abundant In o,ceramu8 prisms: The chalky character' of the 'ma ter ia l is due to abundance of , comminuted microfossil shells. Specimens of Foraminifera present are : Eouvigerina aC'ldeata, Globor otalites conicu8, Planulina ' t exana, Globotrml.cana spp. (common) , Clavulin oides n. sp.9th and 10th feet. Clay, light-gray, chalky, sandy, micaceous, highly glauconitic; ,

2813-2823

Core 61. Recovery 2 ft.

2nd foot. Clay shale, brownish-gray, soft, flaky, micaceous, highly glauconitic; light-speckled appearance is due to abundance

t".,

of small chalky microfossils, Ino ce1'amu8 prisms, and broken and

crushed small fragments of chalky fos sil debr-is. Fauna is like

that in core 60 at 2803-2813 feet, and the specimens are usually

poorly preserved.

2823-2833

Core 62. Recovery 2 ft. Marl, light-gray, sandy (very 'fine-grained sand), chalky, micaceous, highly glauconitic, highly microfossiliferous. The fossil material is" usually composed of ' finely comminuted debris; Inoceramus prisms abundant; Robulus 'l"otulata common; Cibieides' harperi presen't.

.
i.

-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

15

Depth (feet)
2833-2843 2843-2853 2853-2863
2863-2873
2873-2883 2883-2893 2893-2903
2903~2913
2910-2920 2913-2923

Description

Core 63. Recovery 1 ft.

' ,.

Like core 62 at 2823-283.3 ft.

Core 64. . Recovery 10 ft. No change.

Core 65. Recovery 10 ft.

->"

1st to 7th foot like cores 62 (2823-2833 ft.) , 63 (2833-2843 ft.),

64 (2843-2853 ft.).

Beds of Austin age (defini te) Gober Tongue ( ?) equ ivalent 8th,

9t h and 10th feet. Marl, buff, sandy (ve r y fine grained sand),

somewhat mica ceous, chalky. Contain s a large amount of finely

commin ut ed, poorly preserved, mi crofosail debris, and abundant

lnaceramus prisms and fragments. Many specimens of Fora-

minifera present, including H eter astomella au stiniana, Planu-

lina aus tin iana, and Loxostoma clava tum.

Core 66. Recov ery 5 ft. 1st foot. .Marl, gray, light-spotted, dense, slight ly micaceous. Speckled appearance is due to abundant microfossiliferous material and fin ely fragmented chalky f ossil d ebris, Sp ecimens of F oramin ifera are usually very ' smale Globia erina, Gumb elina, several sp ecies of Globotruncana, and a sma ll ' A n omalina sp. strongly predominate; numerous' specimens of Globorotaliies wmbilicatu8 are present. 2nd and Srd f eet:"Similar to 1st f oot, but slightly glauconitic. 4th and 5th f eet. Marl, buff, light-spotted, slightly micaceous, highly mi crofossiliferous.

Core 67. Recovery 5 f t. Like core 66 at 2863-2873 ft.

Core 68. Recovery 6 ft. No change in lithology. Inoc eramus prisms very abundant. Some sp ecimens of V entil ab1'ella aus tiniana and Nonumella austiniana present, but fauna otherwise unchanged.

Core 69. ,.Recover y 4 ft. Marl, buff, slightly mi cac eou s, containing abundant spe cimens of Foraminifera; fauna unchanged.

Core "70. Recovery 10 ft. 1st, 2nd and 3rd feet. Marl, buff, moderately hard, chalky, highly microfossiliferous. Fauna like core 69 at 2893-2903 ft. 6th, 7th and 8th feet. Marl, light-buff, chalky, glauconitic, highly mi crofossiliferous. 9th and 10th feet. Chalk, cream', slightly micaceous, highly glauconitic, highly mi crofossiliferous; pyrite inclusions common; fauna unchanged.

Cuttings cont ain specimens of Kyphopyxa, whi ch may have come from higher levels.

Core 71. Recovery 5 ft. Marl, buff, light-speckled, micaceous, highly microfossiliferous. Dominant species of Foraminifera are: Globie erina cretac ea,

16

:./ -; . .. ., GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

Gumbelina spp., and a -'small A nonUilina ' sp, characteristic' of the beds of Austinage. Also preserit are specimens of Globotruncana austiniana, Globorotalites wmbilicatus, and Planulina teeana; Globigerinn- and Planuli1l4 are the domin~nt forms.

2923-2933

Core 72. Recovery 8 ft. : Marl, ' grayish-tan, somewhat micaceous, highly microfossiliferous. Fauna like core 71 at 2913-2923 ft.

2933~2943
2943-2953

Core 73. Recovery 2 "ft.

Like core 72 at 2923-2933 ft.

, Core 74. Recovery 8 ft.

. l'

Marl, tan-gray, micaceous, slightly carbonaceous, highly micro-

fossiliferous. Fauna unchanged. '

2953-2963

Core 75. Recovery O.

2963-2968

Core 75. Recovery 5 ft.

.

Shale, brownish-gray, flaky, highly micaceous,' somewhat glau-

conitic. Contains fragments of fish scales, green and brown

mica, and a few small arenaceous species of. Foraminifera. Other

species of Foraminifera are like those in core 71 at 2913-2923 ft.

2968-2976

Core 77. Recovery 5 ft.

.

Marl, brownish-gray, micaceous, highly fossiliferous; contains

abundant fragments and prisms of Inoc ermnu8. The foramini-

feral fauna is more representative 't han in core 76, and is Austin

. . in character.

..

2976-2986

Core 78. Recovery 4 ft. Shale, brownish-gray, micaceous, microfossiliferous.

2980-2990

Cuttings contains specimens of FrQ?ulicularia unduwsa.

2986-2996

Core 79. Recovery 3 ft. Like cere 78 at 2976-2986 ft.

2996-3005-

; ..

\.

-:c..

3005-3015

. i ~

Core 80.. Recovery 8 ft.

Top 4 feet. Shale, brownish-gray, highly glauconite, calcareous;

mi crofossiliferous. Inoc eramus fragments are abundant. Fora-

miniferal fauna is composed, largely, of specimens of Gihnbelina

reu8si, Globiq erina. cretacea, Globtruncana. ; canaliculata, and

many specimens of Globorotalites umbilicatuB and Planulina sp.

(small forms).

'

.

..

. .Bot t om 4 ft. shale; brownish-gray, micaceous, calcareous, highly microfossiliferous. ,

Core 81. Recovery 5 ft. Like core 80 at 29963005 ft.

3015-3025

Core 82. Recovery 6 ft. No change.

3025-3035

Core 83. ' Recovery 5 ft.

.

Top 3 ft. Shale, brownish-gray, somewhat micaceous, calcareous,

very highly microfossiliferous, containing comminuted fossil

debris, 'specimens of, iinall Foraminifera and very abundant

Inoceramus prisms and fragments. Microfauna consists, mainly,

.,

LoGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

17

Depth (feet)
3035-3045 3045-3055
3055-3065
3065-3075

Description
of Globiaerina oretacea, Gumbelina r&Ussi, Gumbelina moremani (specimens rare in preceding samples, common in this sample), a small Anomalina sp., a few specimens of Globotruncana, a large, flat fonn of Globigerina(?) cretacea (common), and a few specimens of Globoro talites 1tmbilicatu8. Bottom 2 feet. No samples.
Core 84. Recovery 10 ft. Top 9 feet. Like core 83 at 3025-3035 it; contains abundant fragments of Inoc cramr..us and other bivalves. Specimens of Globotruncana are more' common than in core 83.
Bottom 1 foot. Shale, light-gray, hard, dense, calcareous. Inoee. ra:mus fragments, are relatively scarce, but material is too wellindurated for fauna to wash from sample. Specimens identified
are same as in core 83.
Core 85. Recovery 10 ft. ' Top 5 (?) feet. Shale, brownish-gray, calcareous, very highly fossiliferous, giving shale a somewhat speckled appearance. No marked change in microfauna..
2nd 4 feet. Marl, gray, somewhat micaceous, light-speckled owing to abundance of bwceram1ts fragments and comminuted fossil
debris. No marked change fI1: microfauna.
Bottom (1) 1 foot. Shale, light-gray, hard, dense, calcareous, ." microfossiliferous.
Core 86. Recovery 8 ft. Top 2 feet. Material like bottom of core 85 at 3045-3055 ft. and lenses of smooth, dark-gray, flaky shale containing many irregular-shaped, gray, phosphatic nodules.
Bottom 6 feet. Shale, greenish-gray, flaky, micaceous, containing crushed fragments of fossil (?) material and some fragments of fish scales. Microfauna consists of 'several species of Giimbc~ lina, Globigerina cretacea (small variety), specimens of Globorotalites wrnbilicatus, a few specimens of Globotruncana creta~ea, and specimens of Planulina eaalefordensis,
Core 87. Recovery 10 ft. Shale,' gray, flaky, calcareous, similarto cor e 86; contains small fragments of fish scales and an irregular-shaped area in which large amounts ' of crushed chalky material seem to be composed -of small, broken fragments of fossils. .
Third 2 feet. Shale, dark-gray, flaky, slightly micaceous, calcareous. The speckled appearance of the shale is due to many rather evenly distributed small chalky .specimens of Foraminifera and fragments of Inoc eraanus, An An01nalina sp. and two species of Gumbelina are the dominant specimens of Foraminifera, and specimens of Eo1tvigerina cf. E. austiniana are also present.

18
D epth (feet)
3075-3085 3085-3096 3090-3100 3095-3105
3105-3115 3115-3125
3126-3135

GEORGIA , GEOLOGICAL SURVEY BULLETIN 74
Description
Core 88. Recovery 5 ft. Like core 87 at 3065-3075 ft.
Core 89. Recovery 7 ft. No change.
Fragments of Citharina texana var. were first observed in this sample of cuttings, but the highest occurrence in ' the well may have been above this depth.
Core 90. Recovery 10 ft. Top 5 feet. Shale, gray, flaky, microfossiliferous, like that described for the third 2' feet of core 87 at 3065-3075 ft. Core 90 contains fragments of Inoceramu8 and other macrofossils. Foraminiferal fauna is like core 87, but specimens of Globiqerina cretacea var, are mu ch more' common, and some specimens of Glohotruncana are present. Bottom 5 ft. Like the top 5 ft. but specimens of Foraminifera are less abundant and some specimens of Citha1'ina texana var, are present.
Core 91. Recovery 10 ft. Like core 90 at 3095-3105 ft. Fragments of Inoceramus and other macrofossils are present; microfauna is like core 90.
o Core 92. Recovery 10 ft. Like core 91 at 3105-3115 ft. with the addition of tubular inclusions of 'pyrite. Inoceramus fragm ents are common. Microfauna is like core 91 but specimens are somewhat less abundant; specimens of Citharina texana var. are common,
Core 93. Recovery 7 ft. Like core 92 at 3115-3125 ft, Specimens of Dorothia alexanderi are present.

Atkinson Formation. Upper Member.

3135-3145 3145-3155

Core 94. Recovery 10 ft. Top of deeper-water marine facies of upper member of Atkinson Formation.

Top 91,-2 feet. Clay, dark brownish-gray, flaky, highly sandy and micaceous, somewhat carbonaceous and pyritic; contains many fragments of Osireo: sp. The sand grains are fine, even, and angular.

Bottom 1h foot. Sandstone, soft, somewhat argillaceous, glauconitic, micaceous; the grains are fine, even angular, clear quartz.

' 0 Core 95. Recovery 10 ft.

<

Top 5 feet. Sandstone like bottom of core 94 at 3J135-3145 ft., .

containing some thin lenses of brownish-gray, flaky, micaceous,

carbonaceous, somewhat glauconitic clay. Fragments of Ostrea

sp, are common.

Bottom 5 feet. Like top 5 feet, but only slightly glauconitic.

LOGS OF SELECTED WELLS IN THE C OASTAL PLAIN OF G EORGIA

19

Dept h (feet)
3155-3165 .
3165-3175 3175-3185 3185-319 5 3195-3205
3205-3215 3215-3225 3225-3235
3235-3245

Description
Core 96. Recovery 9 f t. Top 7 f eet. Clay, light-gray, highly sandy (fine-grained sand), highly-micaceous, gla uconiti c, calcareous. . Bottom 2 feet. Clay, greeni sh-gray, irregularly sandy (v ery f ine grained sa nd ), micaceous, gla uconitic, ca r bonaceous, calc areou s. The clay contains numerous reddish-bro wn, small, irregular-shaped nodules of sid erite, and some fragments of fish scales. A few spe cim ens of Globig erina creta eea in the washed sample may not be indig enous.
Cor e 97. Recovery 9 ft. Clay, g reenish-gr ay, sof t , somewh at sandy (fine-grained sand ) , hi ghly mi cac eous, (biotite and muscovite ), cal careous, sligh tly carbona ceous. Th e ' clay contains some 'small, grayish-brown, irregular-sha ped nodules of side rite.
Core 98. Re covery 10 f t . Clay, greenish-gray, flaky, mi caceous, cal careous, containing irregular, hi ghly sandy (f ine-graine d ' sand ), glauconit ic areas. The clay contains sm all gra y and light-brown, irregular-shaped nodul es of si derite.
Cor e 99. Re covery 1 f t. Sha le, olive-gray, flaky, somewhat micaceous , slig htl y carbonaceous, calcare ous.
Core 100. Recovery 10 ft. Shale, like core 99 at 3185-3195 ft. bu t irregularly sandy (f inegrained s a nd ), and more hi ghly mica ceous. The shale contains some f ragments of fi sh bone s, f ish scales, an d nodul es of siderite. The fauna is composed of a few I noceramus prism s and sp ecimens of Planulina ca plefordeneie, Giimbelina sp., Valvu lineria infrequens var., Globiqerino. cr eta cea, and Ha e tut erinella moremani Cushman.
Core 101. Recov ery 7 ft. Like cor e 100 at 3195-3205 ft.
Cor e 102. Recovery 10 ft. Cla y, olive-g ray, sandy (v ery fi ne grained sand) , mica ceous; contains fragm ents of f ossil biva lves," fis h bon es and teeth, phosphatic nodules, a little glauconite a nd a f ew spe cimens of F oramin ifera like-core 100 at 3195-3205 ft.
Core 103. Recovery 7 f t .
Shale, greenish-gray, flaky, somew ha t micaceous, containing irregular areas and thin lenses which are highly . sa ndy (fin egraine d sa nd) and somewh at glauconiti c. The fauna is composed of sm all scattered fra gments of fi sh bone s and sca les, and a few specime ns of For aminif era lik e core 100 at 3195-3205 f t .
'Core 104. Recovery 10 ft. Top 7 fe et. Marl, gray, thinly laminated , slig ht ly micaceous, containing irregul ar areas of very f ine graine d sand. Middle 5 feet. Lik e the t op 7 fee t. Contains abundant specimens

20
Depth (feet)
3245-3255 3255-3261 3261-3266
3266-3271
3271-3276

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

of Foraminifera; Planulina eealei or deneie, G.umbelina', moremani, Globioerina , eretacea var., and a very. few specimens of Globoirumcama. cf. G. area, AmmQbaculite~ sp. and Gaudryina cf. G. foeda,

Bottom 3 feet. Marl, greenish-gray icontains a species of Massilina characteristic of the Eagle Ford shale in Texas.

Core 105. Recovery 10 ft. Top 5 feet. Marl, gray, thinly laminated, micaceous; contains fish scales and specimens of Foraminifera.

Bottom 5 feet. Marl, gray, flaky, slightly micaceous;' contains fish scales and many specimens of Furaminifera.

Core 106. Recovery 5 it.

:,

Top' 3 feet. Shale, greenish-gray, irregularly sandy (moderately coarse grained sand) , somewhat glauconitic.

Bottom 2 feet. Shale, gray, smooth.fhinly laminated, containing fragments of macrofossils, and irregular light-gray silty and micaceous areas.

Core 107. Recovery 2 ft. Top of shallow-water marine facies of upper member of Atkinson Formation. The electric log shows the top of 3253 ft.

Top 1 foot. Sandstone, light-gray, hard, moderately coarse grained, clear quartz and a few peach-colored grains. Contains fragments of Ostrea sp., and some' sca tt er ed nodules of glau, conite.

Bottom 1 foot. Shale, gray, smooth, moderately soft, argilla-

ceous, moderately fine grained. sandstone, containing fragm ents

of carbonaceous material.

'

Core 108. Recovery 5 feet. Top 1 foot. Sandstone, greenish-gray, moderately hard, argilla ceous, micaceous, slightly glauconitic and sandy clay. Sand is very fine to moderately fine 'grained. Core contains fragments of macrofossils.

Second 1 foot. Clay, gray, highly micaceous, sandy (very fine grained sand), containing areas of smooth, ' blue-gray, marly, ,'" shale. A few shell fragm ents present in the core.

Bottom 3 feet. Clay, shaly, greenish-gray, highly micaceous, sandy (fine-grained sand), carbonaceous.

Core contains many fragments of fossil bivalves.

Core 109. Recovery 4 ft. Top. Like, bottom 3 feet of core 108 at 3266-3271 ft. but more coarsely sandy. The sand is gray, argillaceous, highly mica-

ceous. .

Bottom. Sandstone, light-gray, moderately soft, argillaceous; moderately fine' grained, micaceous; contains a few fragments of fossil bivalves and numerous fragments of carbonaceous material.

LOGS OF SELECTED 'WELLS IN THE COASTAL PLAIN OF GEORGIA

21

Depth (feet )

Description

3276-3286 , :w;Core'.110. Recovery 5 ft. .

',. ' ~; ...

Top. Shale, greenish-gray, thinly flaky, highly micaceous, slight-

ly carbonaceous.

.

Bottom. Like the t op 'pa r t but more highly carbonaceous, and .. cont aini ng shell fragments:

3286-3293

Core 111. Recovery 2 fe et.

Top 1 foot. Sandstone, light-gray, hard, dense, moderately fine

grained; cont ai n s numerous fragmen ts of GrYphea sp ., and small

nodules of black (phosphatic?) material: . . _

" ,.

! Bottom '1 foot. Alternating thin lens es of gray shale and very fine to 'm oder ately 'fine grained; glauconitic, micaceous, argillaceous sa n dst one. . Core cont ains' fragments of fo ssil bivalves.
3293-3298 ' Code i12. Recovery 2 ft.
" Sandstone, '.white, soft, micaceous , ' argillaceous: very fine to moderately fine grained.

3298-3308

Core 113. Recov ery % ft. Sandstone, light-gray, hard, dense, fine to moderately fin e grained ; cont ain s many fragments of fossil bivalves, fragments of ' carbonaceous material, and phosphatic nodules. .

3308-3318

Core 114. Rec overy 6 ft. Top 4 feet. Sandstone, .light-gray, .sof t , argillaceous, fine
c grained, highly micaceous, somewhat ca rbonaceous, slightly glauI ,conid c.

. " ....} . Bottom 2 feet. - Shale, greenish-gray, thinly' flaky, somewhat . 'm icaceou s, irregularly interbedded with moderately fine grained argillaceous sandstone. The shale contains lenses of light-gray, slightly' 'car bon aceou s siltstone in which siderite pellets are present.

3318-3328

Core 115. Recovery 8 ft. . Top 4 fe et. Shale, greenish-gray, micaceous, intergrading with light-gray, highly micaceous siltstone. , 'T he core con t ain s fragments of carbonaceous material, phosphatic material, and a few traces of macrofossils. .

2nd 2 feet. Sandstone, light-gray, moderately hard, moderately fine grained, argillaceous, highly glauconitic and micaceous.

Bottom 2 .f eet. Like the 2nd 2 feet but sandstone is somewhat

. coarser grained. .

: , i~ .

3328-3338 ' , Cor e 116. Recovery 5 ft. ..

~"

1 Top' 4 ft. Sandstone, light-gray; moderately' soft, moderately

fine grained, highly glauconitic "an d micaceous.
(
... I J~ Bottom 1 foot. Sandstone, light-gray, moderately soft, silty to

moderately coarse rgr a ined, ' cr oss-bedded, mi caceous, somewhat

(.
3338-3347

carbonaceous. Core 117: Recovery 5 ft.

Top 1 foot; Sandstone, Iight-gray, moderately hard, fine to

moderately fine grained, argillaceous, 'gla uconit ic, somewhat

22
D ep th ( f eet)
3347-3357 3357-33 67
3367-3377
3377-3387
3387-3397 3397-3407 3407-3413 3413-3423
3423-3433

GEORGIA GEOLOGICAL S URVEY BULLETIN 74 .

Description

micaceous; contains fragm ents of fossil bivalves and many fragments of . pho sphatic material. Bottom 4 f eet. Sandstone, moder ate ly soft, fine to moderately fine grained, glauconit ic, ar gillaceou s, somewhat mic aceous; contains many inclus ions of carbonaceous material.

Cor e 118. Recovery 5 ft. Sands tone , . light-gray, sof t , sil t y to moderately fine grained, gla uconitic. _.

Cor e 119. Recovery 10 ft. Top 1 f oot. Sa ndston e, light greenish-gray, like core 118 at 3347-3357 f eet ; contains many fragments of phosphatic material. 2nd 1 foot. Sandsto ne, light-gray , loosely consolida ted, very fine t o moderately coa r se grained, glauconitic, mi ca ceous.

Bottom 8 fe et. . Sandstone, loosely con solidated , silty to fine to coarse gr aine d, gla uconitic, mica ceous,

Core 120. Recovery 5 ft. Top 1 foot. Sandstone, loosely -consolidated, fine to coarsegrained, mica ceous.

Bottom 4 f eet. Sa ndstone, light-gray, silty to fine to moderately fin e grained, hi ghly mi cac eou s, slightly -glauconitic.

Core 121. Recovery 6 ft. Top 1 foot. Sa ndstone, light-gray, moderately soft, fine to moderately coarse gra ine d, somewhat carbonaceous.

2nd 1 f oot. Sandst one , soft, silty to fine to coa rse-gr ained, somewhat mic aceous, ca rbo naceous; cont ains nodules of lightbrown to yellowi sh, soft limonite.

Bottom 4 f eet. Silt st one , light-gray, moderately soft, micaceous.

Cor e 122. Recovery 8 ft. . Like bottom 4 fe et of core 121 at 3377-3387 ft.

Cor e 123. Recovery 4 ft.

Sandstone, light-gray, moderately soft , coar se-gr ained, argil-

lac eous, micaceous.



Cor e 124. Recovery If.! ft. Sandstone, light-gray, fine-grained, micaceous.

Core 125. Recovery 4 ft. c Top 1 foot. Sandstone, light-gray, hard, dens e, conglomeratic
(fine to coarse-grained sand) . Contains irregular-shaped inclusions of light gr eenish-gr ay and dark-gray clay; black, carbonaceous, highly pyritic clay; a f ew nodules' of limonite; and a trace of gla uconite .

Bottom 3 feet. Sandstone, light-gray, moderately soft, moderately fine grained, argillaceous.

Core 126. Recovery 4 ft. Sandsto ne, light- gray, sof t , poorly sorted, moderately ' fine t o moderately coarse grained, a r gillaceous, containing highly micaceous, glauconitic, a nd lign itic lenses.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

23

De p th (f ee t )
3433-3440 3440-3450 3450-34 60
3460-3470 3470-3480
'. 3480-3490 3490-3498 3498-3508
3508-3518 3518-3538

Description

Cor e 127. Recovery 7 ft. Sandstone, light-gray, silty to fine-grained, highly micaceous.

Cor e 128. Recovery 7 ft. Top 5 feet. Like core 127 at 3433-3440 ft. and contains glau-

conitic -streaks and fragments' of carbonaceous material.

Bottom 2 feet. Clay, greenish-gray, silty, so~ewhat micaceous.

Core 129. Recovery 3 ft.

Top 2 f eet. Sandstone, light-gray, soft; fine-grained, silty mi-

caceous. ' : 1.;

,~ . '

'

Bottom 1 fo ot . Sandstone, white, moderately hard, moderately fine grained, micaceous.
Core 130. Recovery ' 2 ft. Clay, gray and greenish-gray, moderately hard.. containing Irregular streaks of highly sandy (coarse-grained sand), somewhat micaceous carbonaceous clay.
Core 131. Recovery 9 ft. Sandstone, light-gray, soft, silty, mi caceous, slightly glauconitic. The sand is, mainly, very fine grained,but a few coarse grains are present.
Core 132. Recovery 10 ft. Sandstone, light-gray, soft, silty, high .micaceous, glauconitic, slightly carbonaceous.
Core 133. Recov ery 2 ft. Silt stone, light-gray, soft, highly micaceous, somewhat glau-
,.' ; conitic, somewhat ca rbonaceous.
Core 134. Recovery 3 ft. Top 1 foot. Sandstone, light-gray, hard dense, moderately coarse grained, very highly micaceous, glauconitic, and pyritic.
MiddleL foot. r Sandstone, greeni sh-gray, soft, silty, fine-grained, very highly micaceous and glauconitic, containing inclusions of carbonaceous material.
Bottom 1 foot. Sa ndst one, white, soft, fine-grained, silty ")mi-
,;
cac eous.
Core 135. Recovery 4 ft. Top 2 feet. Shale, g r eenish-gra y, unctuous, flaky. Bottom 2 fe et. Sandstone, white, moderately hard, fine-grained, silty, micaceous.
Cor e 136. Recovery 9 ft. . Top 5 feet. Sandstone, moderately hard, dense, fine to moderately, fine grained; argillaceous. vmicaceous, containing many small scattered fragments of soft yellowish-brown limonite ( 7)
Middle 1 foot. Clay, light greenish-gray, moderately hard, silty, micaceous.
Bottom 3 feet. Sandstone, greenish-gray, moderately hard, poor. ly sorted, fine to moderately coarse grained, argillaceous, mi-
caceous, containing inclusions of limonite (7).

24

GEORGIA G EOLOGICAL SURVEY BULLETIN 74

D epth (f eet)

Description

~ J . " .J. )

3538-3558 3558-3578

Core 138. Recovery 5 ft.

.',

' Top 1 foot. Siltstone, greenish-gray, dense, finely micaceous, containing:many fragments of carbonized plant remains. . .

Bottom 4 feet. Sandstone, light greenish-gray, soft, moderately fin e to coarse grained, silty; ' argillaceous.

Core 138. Recovery O.

'.

-~

3578-3598 Core 139. Recovery 5 ft.

..

.... - .; . Top' 2 feet. Sandstone. light-gray, moderatelyhard, dense, mod-

erately coarse-grained, slightly pYriti~. The sand grains are

clear quartz. ' j . :'
Middle, 1 foot. Siltstone, white, soft, micaceous.

.,>

.Bottom 2 f eet. Sandstone. j.light-gray, moderately hard, moderately coarse to coarse-grained, somewhat pyritic, containing worn fragments of a bivalve ' Ostrea (1) sp,

3598-3618

Core 140. Recovery 3 ft.

..

.~

'Top 1 foot. Sandstone, gray, hard, dense, coarse-grained, quartz-

itic, cont aining many irregular-shaped inclusions of greenish-

gray clay, glauconite and carbonaceous plant fragments.

2nd 1 foot. Clay, light greenish-gray, micaceous, highly sandy (fine-grained sand).

3d 4 inches. Sandstone, white, moderately hard, dense, mod-

rately fine-grained, glauconitic.

;, i.,

4th, 5 ' inches. Sandstone, greenish-gray, moderately coarse

grained, argillaceous, micaceous, containing' iriclusions of thinly

laminated green shale that seem to have been secondarily3'de1

posited in the sandstone.

t ..

5th 3 inches. Sandstone, light-gray, moderately hard, moderate-

" ' 1 , '.'; Iy fine to coarse-grained, mainly', clear quartz but cont a ining

peach-colored grains;

3618-3638

Core 141. Recovery 4 ft.

Top 1 foot. Sandstone, light-gray, hard, dense, moderately fine

grained, micaceous, clear quartz, containing a f ew pinkish

grains, dark-green nodules of ' glauconite, and ' highly pyritic

areas.

. . :. ~

2nd 1 foot. Like top 1 foot.

3d 1 foot. Sandstone, light-gray, hard, fine-grained, micaceous,

glauconitic.

-e

.., v .' . .. , . "

4th 1 foot. Clay, 'green ish-gray, slightly sandy, micaceous and somewhat carbonaceous.

3638-3658

Core 142. , Recovery 3 ft.

Top 1 foot. Sandstone, moderately hard, ' moderately coarse

. grained, micaceous, glauconitic" containing fragments of ca r-

bonaceous matertal, a few phosphatic .nodules and greenish-gray

inclusions ' ( pr obably ' secondary),

. :''-;J

-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

25

Dep th (feet)
3658-3678 3678-3698
3698-3718 3700-3720

Description
Middle 1 foot. Silt, gray, somewhat carbonaceous, containing irregular areas that are sandy, micaceous and slightly glauco.n it ic, '
Bottom 1 f oot. Sandstone, light-gray, hard, dense, moderately coarse-grained, micaceous, glauconitic.
Core 143. Recovery 8 ft. Top 1 foot. Sandstone, hard, moderately coarse-grained, calcareous, glauconitic, composed mainly of clear quartz grains and few pink or peach-colored grains. 2nd 1 foot. Shale, greenish-gray, thinly flaky, silty to sandy, containing a few sma ll carbonaceous fragments. 3d 2 feet. Sandstone, light-gray, hard, moderately coarse grained, micaceous, glauconitic, containing -numerous inclusions Of carbonized plant fragm ents. 4th 2 feet. Clay, greenish-gray, silty, micaceous, containing lenses of dark-greenish-gray thinly laminated shale. . ' 5th 2 fe et. Sandstone, light-gray, hard, dense, moderately fine grained, micaceous, glauconitic.
Core 144. Recovery 8 ft. Top 3 fe et. Shale, greenish-gray, flaky, micaceous, containing communinuted carbonaceous fragments, '
2nd 1 fo ot. Con glomerate, composed of dense, moderately fine grained, glauconitic sandston~ containing secondary nodular inclusions' 'of green and dark brownish-gray clay, limonite nodul es, many worn and broken sh ell fragments, and fragm ents of carbonaceous material. Another part of the core is soft, coarsegrained, micaceous sandstone.
3d 3 feet. Siltstone , light-gray, glauconitic, micaceous, and lenses of dark greenish-gray, unctuous shale.
4th 1 f oot . Sandstone, light-gray, hard, dense, conglomeratic, glauconitic; contains worn sh ell-fragments, fragments of pyritized 'lig nit e, and nodular fragm ents of greenish-gray clay and of limonite. Another part of the core is den se, glauconitic, micaceous sandstone 'con t ain ing abundant small scattered frag: ments of limonite. '-0
Core 145. Recovery 7 -ft. Top 3 feet . Sandstone, light-gray, dense, very highly micaceous (muscovite and biotite), glauconitic.
Bottom 4 feet. Shale, greenish-gray to dark green, smoothtextured, slightly micaceous and carbonaceous, non-calcareous. The bottom foot is irregularly highly sandy (fine-grained sand) and micaceous:
Clay, brownish-gray, micaceous and fragments of light-gray and brownish-gray sandstone j shell fragments present.

26
Depth (feet )
3720-37 30
37303 750 3750-3760
3760-3770
3770-3790 3790-3800 3800-3810 3810-3820
3820-3830 3830-3840 3840-3850
3850-3860 3860-3870

G E ORGIA G EOL OGICAL S URVEY ' B ULLETIN 74

Description

Atkinson Formation. Lower Member.

Shale, greenish-gray, and many fragments of white, moderately fine grained glauconitic, micaceous sandstone] numerous shell fragments and a few carbonaceous fragments. .

Top of t he lower member of the Atk inson Formation (marine fa cies ) is at 3723 ft. on the elect ric log of the well.

Like sample at 3720-3730 ft.

Like sample at 3730-3750 ft; fragments of lignite are common, and a f ew, probably ind igenous spec imens of ostracodes are present.

Shale, gr ay an d g reenis h-gr ay , an d man y fragm ents of irregularly sandy, som ewhat glauconitic, highly macrofos siliferous lim estone, which al so contain sp ecim ens of ostracodes like those in sample at 3750-3760 ft. Th e sample cont a ins f r agment s of sandstone and fr agments of lignite.

No change.

Shale, olive-gray, flaky, and fragments of fossiliferous limestone.

Like sample at 3790-3800 f t ; fragm ents of f ossil biv alves; limestone fr agments more abundant. .

Sh al e, olive-gray, fragments of Ostr ea('l) sp ., and several types'

of san dstone. Sample contains sp ecimens .of Ammobaculites

agr estis and Ammotiltm braunsteini.

.

Shale, gr eeni sh-gray, flaky, somewhat micaceous.

Shale, gray, cont ai ning shell fragments.

Shale, g reeni sh-g r ay, fl aky, 50 percent; and 50 percent moderately coarse grained quartz sandstone containing grains of pink feldspar.

Lik e samp le a t 3840-3850 ft., but sandstone is less than 50 percent.

Shale, greenish-gray, flaky, a little sa ndst one , and numerous fragments of white bentonite.

Comanche Series. Und iff erenti at ed

3870-3880

Shale, flaky, and coa r se-g rai ne d sandstone like sample at 3860-

3870 ft. Sample al so contains f ragments of sandy (fine-grained

sand) bentoni te, f ir st observed in sample at 3860-3870 f t. , numero us f ragments of bro wnish and purpli sh-redmicace~us cla y ;

siderit e pellets (poss ibly cav ing from higher levels) ; fragments

of pink-stained, nodular limestone.

,i

3880-3890

Shale, gray an d greeni sh-gray, flaky, and many fragments of brick-red , purplish- r ed , red and gray mottled, and mustard and

f

gray mot tled, mi caceous, sa ndy shale ; light greenish-br own

sid erite nodules ; pink-stained limestone nodules ; a little coarse-

grained, unconsolidated sand.

3890-3900

Like sample a t 3880-3890 ft., but no limestone nodules.

,

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

27

f

~. :

Depth (f ee t )

Description

3900-3910

Sand, unconsolidated, coarse-grained; quartz, and scattered grains

"

of f eldsp ar, abou t 75 jJercen t; gray, thinly "flaky shale, and

r

3910-3920

red and multicolored shale about 25 percent of sample. Sand, coarse-grained, and shale like sample at 3900-391(i ft., sam-

,,r
;

ple contains many grains of pink and yellow feldspar, and a f ew grains of greeni sh-yello w quartz ( 1) .

3920-3930

Like sample at 3910-3920 ft., but shale fragments are more abun-

dant.

3930-3940

No change.

3940-3950

Like sample at 3930-3940 ft., but fragm ents of red shale, red and mustard mottled shale, and purple shale are very abundant.

3950-3960 ' Sand, unc onsolidated, pinkish-gray, coa rse-gra ined, quartz, and

many red-stained grains. Sample contains fragments of red,

purple and mottled shale.

.

3960-4060 ' No change.

4060-4070
4070-4080 4080-4090

Mudstone, gray, r ed, purple, a nd mottled ; unconsolidated sand like that described in sample at 3950-3960 ft. Grains of feld spar ar e comm on , and fragments of sh ale are abundant.
Clay, red, and fine t o very coarse grained quartz sand; a little feldspar.
Sand, fin e to very coarse grained; a little red feldspar.

4090-4095 4095-4100 4097-4102

Sand, like sample at 4080-4090 ft ; a little red shale; abundant' cavings of gray shale.
Clay sha le, bright r ed, 50 percent of sample ; cavings of gray shale 50 percent.
Cor e 146. Recovery O.

4100-4110

Clay, gray, one-third of sample ; clay sha le, one-third of sample; sand, one-third of sample.

4110-4120

Clay shale, red 75 percent; sand 25 percent.

4120-4130 L ..

Sand, fine to very coarse grained, subangular, r ed-stained quartz; staining probably from red clay matrix. Yell ow grains of quartz, and grains of f eldspar are present,

4130-41 40

Sand, like sample at 4120-4130 ft.

4140-4150

Sand, yellow-tinted grains, and bright yellow clay that is probably the matrix in whi ch the sand occurs ; a few varicolored pebbl es of igneous (1) ro cks; rounded p ebbles of red and yell ow f eldspar ; rounded pebbles of yellow quartz.

4150-4160

Sand, moderately coa r se grained, quartz; grains of feldspar and , a little red clay. ,

4160-4170

Sand, fine to very coarse grained, quartz; a little feldspar; a few pebbles of ign eous (1 ) rocks; a few small fragm ents of red clay.

4164-4167

Cor e 147. Recov ery 3 f t. Top. Clay; brownish-red, silty, micaceous.

1,-
'"

28
Depth (feet)
4170 -4180 4180-4190 4190-4200
4.200-4210 ,4210-4220

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Bottom. Like top sample, and irregularly streaked with light bluish-gray, silty to sandy (fine-grained sand), argillaceous clay.
Clay, red, 75 percent; sand, like sample at 4160-4170 25 percen t. 'N o change.
Sand, 50 percent; clay 50 percent. Sand is in part, like sample at 4160-4170 ft.; and in part, fraginents of fine-grained , evengrained, soft sandsto ne containing grains of red feldspar, and hard yellow clay.
Sandstone, fine to very coarse grained, compo sed of yellow and red-stained grains, a nd a f ew grains of f eldspar ; al so mediumgrained sandstone having small amou.nt o.. f ma.trix.
Sand, yellow and white, mostly coarse-grained, quartz and a little feldspar. .

Pre-Cretaceous

4220-4280

Igneous rock.

4279-42821f.l . Core 148. Recovery 3 ft.

Igneous rock.

4280-4296 T.D. No samples.

BACON COUNTY

Operator ; City of Alma Well 1 Location: City of Alma, Ga.

GGS: No. 58 Elevation: 195 ft. (approx.) Total depth: 626 ft. '
Completed: .May 20; 1938 .

Summary of Stratigraphy

Tertiary

Depth Thic kness (feet) " (feet)
" ,.

Pliocene to Recent -~------------------ ~_~~ ~ ~ ~ Surface

50

No samples

~___

50

14

Miocene 'undiffer entiat ed Ol. igocene
upper, , Suwannee Limestone
.. Eocene ... . .
upper, Ocala Limestone

'.

~~________ 64 '"

386

450

50

to upper member 500 total 126
. depth-

Lithologic and paleontologic description of cut-

tings and cores. Samples are' cuttings unle ss

otherwise stated.

\,

r
1
!
\
i
!

-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

29

Depth (feet)
0- 10 10- 40 40- 50 50- 64

Description
Pliocene Series to Recent Series
Sand, quartz, dark, reddish-brown, coarse-grained argillaceous. Clay, red, sandy. 'W a sh ed residue, large; composed of fine-grained,
angular, clear quartz sand, red-stained by the clay matrix. ' Sand, quartz, clear, coarse-grained, subangular; etched. No samples.

64- 118 118
118- 140
140- 150 150- 160
160- 170 170- 180 180- 190 ' 190- 200 200- 210 210- 220 220- 230 230- 240

Miocene Series undifferentiated

Clay, greenish-gray, sandy. Washed residue, large; composed of' fine-grained, angular, clear quartz sand, and several fragments of carbonaceous material.

Clay, greenish-gray, sandy. Washed residue, large; composed of moderately coarse grained, subangular, moderately even grained, clear quartz sand, and a few fragments of the clay matrix. '

Chalk, white, sandy, soft. Washed residue, large; composed, chiefly, of nodules of hard sandy chalk, some of which contain worn fragments of macroscopic fossils (Ostrea (?) sp.); about 10 percent of washed residue is clear, uneven-grained, quartz ' sand.

Clay, greenish-tan, sandy. Washed residue, ' moderately small; composed of fragments of clay and about 50 percent clear, angular, uneven-grained quartz sand.

Clay, light-tan, sandy. Washed residue, small; composed of clear

quartz sand, a few nodules .of 'hard limestone as in sample at

118-140 ft., and a few fragments of greenish-gray carbonaceous

clay.

'

Clay, tan, sandy. Washed residue, moderately large; composed of very uneven grained, clear. quartz ' sand, and about 10 percent fragments of hard clay.

"Clay, tan, somewhat sandy. Washed residue, small; composed of

fragments of hard clay, and about 50 percent very uneven grain-

ed clear quartz sand.

.

Clay, greenish-tan, sandy. Washed residue, moderately large; composed of nodular fragm ents of hard calcareous clay, and about 50 percent very uneven grained clear quartz sand.

Clay, light-brown, sandy. Washed residue, moderately large; composed of very uneven grained, angular, clear quartz sand.

Sand, quartz, clear, angular, un even-grained, and about 25 percent light-brown chert; a few fragments of white chalky limestone.

Sand, .quartz, clear, uneven-grained; a few fragments of ' white chalky limestone, as in the sample at 200-210 ft., and a few fragments of grayish-green, sandy clay shale.

Limestone, cream, soft , chalky, irregularly sandy, and about 25 percent uneven-grained quartz sand; a small amount of light-brown chert.

.Limest one, white, chalky, sandy, and greenish-gray, shaly, sandy clay. Washed residue, moderately large; composed of fragments

30
Depth (feet)
240- 260 260- 270
270- 280 . 280- 290
290- 300 300- 310 310- 320 320- 340
340- 350 350-' 360 360- 370
. 370- 380 , 380- 400
400- 410
410- 430

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

of hard limestone, and nodular fragm ents of calcareous clay; about 25 percent of the washed residue is uneven-grained, clear
quartz sand.

Clay, greenish-tan, Washed residue, sm all ; composed of small fragments of clay, and about 50 percent very un even grained clear quartz sand; a few small, black, phosphatic p ebbles.

Chalk, soft, sandy. Washed re sidue, moderately large; compo sed

of about 75 percent nodular fragments of hard sandy chalk con-

taining inclusions of shells (ostracodes r) : about 25 percent fin e,

angular, clear quartz sand, and a few small, black, phosphatic

~~

.

Like sample at 260-270 feet, but nodular fragments of limestone

constitute about: 25 percent of the washed residue, and sand con-

stitutes about 75 percent.

.

Sand, fine, uneven-grained, and a f ew nodules of hard sandy chalk.

Clay, tan, sandy (fine-grained sand). -W a shed residue, very sma ll ; composed of fine-grained, angular, clear quartz sand, and a f ew resistant fragments of light greenish-gray unctuous clay.

Clay, greenish-tan, sandy. Washed residue, small; composed of fine-grained, angular, clear (white) quartz sand.

Clay, greenish-gray, sandy (fine-grained sand). Washed residue, small; composed of fine-grained sand, and about 10 percent small, tough fragments of clay.

Bit sample. Clay, gray, sandy. Washed r esidue, small; composed of moderately coarse grained, clear quartz sand, and a few fragments of light-green clay.

Clay, greenish-gray, somewhat sandy. Washed residue, very small; composed of sand like sample at 320-340 ft., and about 10 percent fragments of hard clay.

Clay, greenish-gray, sandy. Washed residue is small, and similar to the sample at 340-350 ft.

Clay, sandy, and chalk. Washed residue, large; composed of fragm ents of hard sandy, chalky limestone, arid about 25 percent uneven-grained, clear quartz sand. Some fragments of limestone show traces of embedded worn and broken fossil shells.

Like sample at 360-370 ft. ; sand composes about 75 percent of the sample.

Limestone, white, nodular'; is about 50 percent of the sample, and coarse, uneven-grained quartz sand is about 50 percent. The limestone shows traces of worn and fragm ented fossil sh ells.

Limestone, light-gray and light-tan, hard, nodular, sandy, containing traces of fragmented and very much worn fos sil shells. About 25 percent of the sample is composed of clear, angular, finegrained quartz sand.

Limestone, white, sandy, nodular, cont a inin g a few sma ll , black, phosphatic pebbles, and many worn fragments of fossil shells, among which are Barnea sp. , Ostre sp., large echinoid spines, and crab claws. About 50 percent of the sample is composed of fine-grained, angular, clear quartz sand, and many small, black, phosphatic pebbles.

AI

L OGS OF S ELE CTE D WELLS IN THE CO AST AL PLAIN OF GEORGIA

31

Depth (feet)
430- 450

Description
Like sa mp le at 410~430 f t ., but showing an in cr ea se in sand content.

460- 470
470- 490 490- 500

Oligoc ene Ser ies

Upper Oligocene

Suwannee Limestone.

Lime sto ne, white, hard , nodular. Some f r agments of the limestone are por ous and oolitic, and m any f r agment s contain worn and

broken fossil shells. Megaf ossil s a r e, chiely , () st r ea sp., Pect en sp.,

and E chinoids. Microfoss ils are, chiefly , mold s of .a small , sharply

con ical fo r m of Cosk in olino. eooke i, poorl y-p r es erved sp ecimens

of A r chaie sp. and R otalia cf. R . 7nex icana, and a f ew speci-

mens of Gy psina sp ., E lphidiu7n cf. E . chapmani, Eponid es sp.,

and Quinqu eloculina sp p.

'

.

Limestone, white, hard, f ossili f erous , containing m any speci men s of: Coskinolina cookei (typical f or m ) V alvulammina sp , (C us hman and McGlame ry ) Quinq u eloculina cf. Q. lustra Quinq u elocu lina cf. Q. glabrata T ex tu laria cf. T. 8ubhauen-ii

Valvulina sp, (Cushman and McGla mer y) E chinoid fr agment s

No change.

Sim ilar t o sam ples at 450-470 ft., but the fo ssil ma terial is less well preserved.

500- 510
510- 520 520- 530 530- 540 540- 550

Eocene Series

Upp er Eocene. Ocala Limestone. U ppe r Member,

. Limeston e, cream, hard, hi ghly f ossiliferou s. The dominant macro-

f ossils are f ragments of Bryozoa , Ostrea sp., a n d P ect en sp.

Microfossils are, chi efly, speci me ns of Operculin a cf, O. [loriden-

sis, L ep idocy clina ocalana, Asterocyclina, georgiana, .Sp hae r o-

gypsina glo bula.

.

N o sample.

Limestone, cream, coquinoid, composed, mainly, of ca lcit ised bryo-, zoan fragm ents , many specimens of Op er culina sp., and a few
s pecimens of L epidocyclin a s p.

Limestone, wh it e, h ard, ' coqu inoid , composed of f ragments of

. Bryozoa , Ostr ea sp ., Pect en sp., and man y specimens of species . of Fora mi n ifera as in sa mp le at 500-510 f t.

Like sa m ple at 530-540 ft. , cont a in ing many sp ecim ens of Foraminifera. The most abundant species are :

L ep idocy clina oealana

Oper cu lina [ loridensie H et er ostegina ocalana A st e1'ocy clin a g eO'rgian a Ci bicid es lobatu lu e var,

Spha er ogypsina globula. Epm ides bu dens is

'-

32

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

Epvnides iacksonensis Eponides n. sp. Guttulina irregularis

550- 560 .

Siplwnina iacksonensis Nonion advenum var.
Like sample at 530-540 ft. The most abundant species are: _Operculina !loridensis, Asterocyclina ge01gmna, and H eterostegina ocalana. R obulus limbostw var. is fairly common, and other

species are as listed in sample at 540-550 ft.

560- 570 " Like sample at 5 50~560 ft.

570- 580

Like sample at 550-560 ft. Specimens of L epidocyclina cf. L. cookei

are common.

580- 590

No sample.

- 590- 600 Like sample at 570-580 ft.

600- 626 T.D. Like sample at 570-580 ft.

BROOKS COUNTY

Operator: D. E. Hughes Landowner: E. M. Rogers, Sr., Welll B
Location: Land District 12, Land Lot 454 2830 ft. south and- 1570 ft. west of northeast corner of Land Lot 454.

GGS. No. 184
Elevation: 136ft. (derrick floor)
-Total depth: 3850 ft. Completed: Apr. 12, 1949

Summary of Stratigraphy

Tertiary

Paleocene

in beds containing Tamesi fauna;

~

1st sample at 2200 ft. --- -------~-. -.__

Depth (feet)
?

Th icknesa (feet)
?

Cretaceous

Gulf

_Beds of Navarro ( ?) age or

Taylor ( ?) age __ _ _ ____ _ __________ 2230

100

Beds of Taylor age (definite) ____________________ 2330

220

Beds of Austin age_______________________________________________________ 2550

540

Atkinson Formation, upper member----,------ --- 3090

300

do

lower member______- - -- --- 3390

230

Comanche undifferentiated ________ _ _ _____.__ 3620

230

. .

to total depth

Lithologic and paleontologic description of cut-

tings - and cores. Samples are cuttings .unless

otherwise stated.

'

,;-
.
~i
\.

. s.

\'

\ LOGS OF $ELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

33

\

Depth\

Description

(feet) .:.\

0-2200 Samples not studied.

Tertiary

. J; . s ,

..'

In Paleocene. .S.e..r.i.es

2200-2210

Shale, gray, marly, and fine to medium-grained sand, 50 percent

of sample; specimens of species. of Foraminifera indicative of

the beds of Paleocene age containing the Tainesi fauna, 50 per~

cent of sample. '





2210-2220

Sample not studied.

2220-2230

Like sample at 2200-2210 ft. and some large nodules of glauconite. .

2230-2240 2240-2250
2250-2330.

Cretaceous
Gulf Series
Beds of Navarro(?) age or Beds of Taylor(?) age.
:Like sample at 2200-2210 ft., but contains 'a few specimens of
-f ..
Globotruncana sp. ~arking the top of the Cretaceous.
a Shale, gray, marly, .and few fragments of glauconite about 50
percent of sample; fine to moderately coarse grained sand (pos sibly caving) about 50 percent of sample. Specimens of Globotruncana sp. and other Cretaceous Foraminifera present. Samples not studied.

Beds of Taylor :age .(definite)

2330-2340 ~

Shale, gray, marly. Fauna consists 'of many specimens of Fora-

minifera. including the typical Taylor .species Bolivinoides deco-

. rata. arid Bolivina itncrassata..

'

2340-2350

Marl, like sample at 2330-2340 ft., a little light-gray chalky marl, and specimens of StensiJciina americana: and Gl<>borotalites c~ icus.

2350-2550 -- Samples not described, but are composed, mainly, of mediumgrained sand and gray, soft, chalky marl and ..shade.

2550-2560
2560-2570 2570-2610 2610-2620
2620-2640

Beds of Austin age (electric log correlation)
Shale, gray, several types, a little chalky marl, and a few fragments of white, hard unfossilif.'~r~us ( ?) ch!llk, about 50 percent of sample. Sand is about 50 percent of sample. The foraminiferal fauna contains specimens of typical Taylor species. "
Marl, a little white hard chalk, fragments of Inoceramus, and the usual cavings of sa~d.
Samples not studied. Similar, in general, to sample at 2560-2570 ft., but contains many
Inoceramus fragTrtents and a few- chips of gray marly shale irregularly streaked With soft white chalk. Samples not studied.

34
Depth (feet)
2640-2650
2650-2660 2660-2670 2670-2680
2680-2740 2740-2750
2750-2760 2.760-2770 2770-2800 .
2800-2810
2810-2870 2870-2880 2880-2910 2910-2920
2920-3011 3011-3021

GEORGIA GEOLOGICAL .SURVEY BULLETIN 74
Description

I JI

Sand, 50 percent; several types of gray shale and a few fragments of chalk 50 percent. Material being drilled is possibly a soft white chalk containing many Inoceramus fragments and a nondiagnostic microfauna.
Like sample at 2640-2650 ft and a few specimens of Planulina
austiniana.
Sample not studied.
Like sample at 2640-2650 ft., and a few specimens of Kyphopyxa christne-~-i and Pseudogaudryinella capitosa var. (early Taylor or late Austin age).
Samples not studied.
Sample is mainly sand (caving?), fragments of gray shale, and foraminiferal specimens from various higher levels. A few fragments and nodules of white chalk probably indicate the material being drilled at this depth. Many nodules of pyrite are present, and also a few specimens of Foraminifera and. Ostracoda that are indicative of the early Taylor or late Austin age of the beds; Inoceramus fragments are fairly common.
Sample not s~died.
Mainly cavings of sand, gray marl, and specimens of Foraminifera.
Samples are about 75 percent medium-grained, angular sand and 25 percent Inoce-1a:nw.s fragments and specimens of Foraminifera.
Shale, gray, marly, a little sand, a few Inoceramus fragments, and a few specimens of Foraminifera that are not narrowly restricted. Also observed were a few specimens of Cythere simplicatc that is common in the beds of late Austin age although 'present in the beds of early Taylor age.
Like the sample at.2800-2810 ft.
Shale, gray, showing the typical speckled appearance of the lower part of the beds of Austin age.
Like the sample at 2870-2880 ft.
Shale, gray, marly, a little sand, and a few highly speckled fragments of shale. Specimens of Foraminifera are mainly Globigerina sp. and Gumbclina sp.; specimens of Globorotalia umbilicata (common in the lower part of the beds of Austin age in southern Georgia) are common. Fragments of Ostrea sp. are also present.
Samples not studied.
Core 2. Recovery 10 ft.
Top. Sandstone, light-gray, soft, fine-grained, even-grained, argillaceous, micaceous slightly glauconitic.
Middle. Sandstone, gray, fine-grained, argillaceous, micaceous, glauconitic, calcareous; fragments of Ostrea sp. present.
Bottom. Like middle part of core.

,..

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

35

Depth (feet)
3021-3040 3040-3050
3050-3090

Description
A sample of cuttings from this depth shows gray, ba1d, sandy nodules and many fragments of Ostrea sp., sug~esting a beach or near-shore depositional environment. Samples not studied. Sand and sandstone, like sample at 3011-3021 ft.; many fragments of white, hard, highly' sandy (fine-grained _sand)' somewhat glauconitic chalk; many . fragments of Ost1ea sp ., microfauna nondiagnostic. Samples not studied.

3090-3100 3100-3110 3110-3120 3120-3130 3130-3380
3380-3390
3390-3400 3400-3410

Atkinson Formation. Upper Member.

Shale, sandy and mariy fragments of Ostrea sp .; fragmen_ts of

white, fine to medium-grained, calcareous sandstone, containing

fragments of Ostrea sp., phosphatic bone fragments, and a trace

of glauconite.



Shale, grayish-green, flaky; abundant fragments of sandstone, like sample at 3090-3100 ft., containing glauconitic and phosphatic material, and many fragments of shells.

Sample not studied.

Sandstone, shell fragments, and cavings from higher levels; a little grayish-green flaky shale.

Samples in this interval are composed of fragments of sandstone

like the samples below 3090 ft.; cavings of shale from higher

levels; fragments of grayish-green shale; ~ragments of shells

of macrofossils; and a few nondiagnostic specimens of ~ora

minifera that are probably caving. The white-speckled appear-

ance of some fragments of the grayish-green shale is due to the

high content of comminuted tests of microfossils. A few frag-

ments of lignite are usually present in the samples. The quantity

of sandstone fragments decreases progressively with depth, and

the samples in the lower part of . the interval are composed

mainly, of grayish-green sl!ale, -fine~grained sand and a dew

cavings from _higher levels.

' .

Shale, green,- sandy (fine-grained sand), and a mixture of material caving from higher levels. Fragments of light greenish-gray, very finely granular limestone containing broken shells of macrofossils are probably from the strata penetrated near this depth. Fragments of the green shale contain a f ew specimens of Planulina eaglefmdensis.

Atkinson Formation. Lower Member.
Like the sample at 3380-3390 ft.; a few fragments of green, flaky, wa~y, highly micaceous shale, and a little greenish-gray fo~sili ferous limestone.
Shale, grayish-green, and sand; a little green, micaceous shale.

:
36
Depth (feet)
3410-3430 3430-3440 3440-3460 3460-3470
3470-3480 3480-3490
3490-3500
3500-3543 3543-3556
3556-3560 3560-3570 3570-3620

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Samples not studied.

Shale, grayish-green.

Samples not studied: Shale, grayish-green, containing 'a few specimens of A'mmctium
m:aunsteini (an arenaceous species characteristic of the lower member of the Atkinson Formation). '

Shale, grayish-green, containing specimens of Ammobaculoides

plummerae.



Shale, some fragments of which are microfossiliferous; a few fragments of cream pyritic limestone containing broken shells of macrofossils.

Shale, dark greenish-gray, containing a few qwarf specimens of Foraminifera, and a few specimens of arenaceous species characteristic of the lower member of the Atkinson Formation.

No change.

Core 3. Recovery 10 ft. Top. Sandstone, light-gray, soft, medium-grained, highly glauconitic, somewhat-- micaceous.

Middle. Like the top sample, but slightly finer grained.

Bottom. Sandstone, soft, medium t0 coarse-grained; loosely cemented.

No sample.

Shale, greenish-gray, and a little sandstone and unconsolidated sand.

No change.

Comanche Series undifferentiated

3620-3630

Shale, like the sampl.e at 3560-3570 ft., and a little unconsolidated

sand containing a few coarse .grains; also, dull grayish-brown,

waxy, somewhat carbonaceous and sandy (fine-grained sand)

shale containing nodules of siderite.



3630-3640

Like the sample at 3620-3.630, but without the coarse grains of

sand and showing an increase in the grayish-brown shale.

3640-3660

No change.

3660-3670

Sand, unconsolidated, coarse to very coarse, quartz, containing a

few pink-tinted and yellow-tinted grains, a little feldspar, and a

little colorless mica.

3670-3750

No change..

3750-3760

Sand, like the sample at 3660-3670 ft., and a few fragments of

dark-red, waxy, finely micaceous shale.

3760-3850 T.D. Sand, mainly coarse-grained quartz, containing some feldspar. At 3840-3845 ft. the samples show a few fragments of purplishred, silty shale.

... --4?4

....

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

37

CALHOUN COUNTY

Operator: Sowega Minerals Explora- GGS. No 192

tion Co., Inc.

Landowner: J. W. West Well #1

Elevation: 345 ft.

Location: Land District 4, Land Lot Total depth : 5265 ft.

328; 200 ft. north of south line and Completed: Jan. 13, 1950

200 ft. east of west line of Land .Lot_

328.

.

Summary of Stratigraphy

Tertiary

D epth (feet)

Samples not studied Cretaceous

Gulf

Beds of Navarro age______________ ____~~---------- I 560 1

Beds of Taylor age____,~----.----- ---------- . 970

~~ds Of Austin age~-~-------------------~------~--- 1420 Atkinson Formation; upper member________________________ 2100

-

do

lower member_ _______ _______ 2650

Comanche undifferentiated ---------------~- 2920

Thickness (feet)
410 450 680 550 270 930?

Triassic (? ) ,

UpperTriassic (?). Newark .(?) Group

c)astic .rocks ------------.,----------------------- 3850 ?

1340?

diabase -~-------------------~-~--------------------------------- 5190

75

. .

.. .

' . .

, to total depth

Lithologic and paleontologic description ~ of cut-.

tings and cores. Samples are cuttings unless

otherwise- stated.



Dept!{ (feet)
(,o. 0- 770 .

Description
Samples not studied by E. R. Applii\.

560- 600

-r

\ Cretacegus

Gulf Series

Beds of Navarro age
"S~nd: fine to coarse-grained, angular grains. May represent basal Clayton Formation."1

1 Herrick, S .M . 1961, Ga. Geol. Survey B u ll. 70, p . 57.

38

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

600- 770

"Marl: gray, silty, micaceous, glauconitic, fossiliferous (macroshells, ostracodes, and Foraminifera); xxx, Anomalina pseudopapillosa at 680-690."2 This fossil is classified by E. R. Applin as Navarro age.

.770- 780

Description of samples .by E. R. Applin begins at this depth. Sand, fine to coarse-grained, quartz; fragments of white limestone
and a little glauconite, probably caving from higher levels; fragments of light-gray, sandy, (fine-grained sand), chalky clay, probably the material being drilled at this depth. Specimens of A nomalina pseudopapillosa present.

780- 790

Like sample at 770-780 ft., and a few specimens of Globigerina

.;.;:

cretacea.

790- 800

Sand, fine-grained, angular grains; a little coarse-grained sand; a little glauconite; and fragments of white limestone, probably all caving from higher levels. Many fragments of light-gray, highly sandy (fine-grained sand), calcareous, somewhat micaceous clay, that is probably the material bei.ng drilled at this depth. Sample contains a few small fragments of Inoceramus and other fossil bivalves; specimens of several species of ostracodes; and specimens of species of Foraminifera that are typical of the upper part of the beds of Navarro age: Anomalina. pseudopapillooa (fairly common), Globotruncana cretacea (small specimens), Robulus navarroensis, and Gaudryinella pseudoserrata. 1

800- 810

Sample not studied.

820- 860

Like sample at 790-800 ft.; a few phosphatic nodules at 820-830 ft.

860- 870

Clay, gray, highly sandy (fine-grained sand); micaceous, like sample at 790-800 ft. Sample contains a trace of glauconite, a few phosphatic nodules, and a few nodules of pyrite. Specimens of Foraminifera are like those in sample at 790-800 ft., and in addition, many specimens of Anomalina pinouis, a few specimens of Cibicides harperi and several other rotalid forms; .Globotruncana cret<tcea is slightly more common.

870- 900

No change.

900- 920

Like sample at 860-870 ft., but fine to coarse-grained sand is abundant. No change in fauna.

920- 940

Clay, light-gray, highly sandy, calcareous, micaceous, glauconitic, or argillaceous san.dstone. Sample contains a few phosphatic nodules, a few fragments of Inoceramus and shells of other fossil bivalves; microfauna is unchanged.

940- 970 .

Like sample at 920-940 ft.; glauconite is apout 10 to 20 percent of the samples.

2Herrick, S. M., 1961, Ga. Geo). Survey, Bull. 70, p. 57.

,. . . .
''
,.
-i''

LoGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

39

Depth (feet)

Description

Beds of Taylor Age

970- 980 980-1010 1010-1020
1020-1070
1070-1080 1080-1100 1100-1200 r2oo-1210
1210-1330 1330-1340 1340-1420

Sand, fine to coarse-grained quartz; glauconite is about 10 percent of the sample. Sample contains sandy marl and a microfauna similar to that in the beds of Navarro age with the addition of specimens of Anom.alina sholtzensis.

No change.

Marl, gray, sandy, highly glauconitic. Nodules of dark-green glauconite are about 50 percent of the sample; sand is composed of fine to coarse, angular grains of quartz, with medium grains stlongly dominant. Sample contains many specimens of Planulina durnblei, Anornalina sholt;wnsis, Bolivina iiwrassata, Gyroidina globosa, and other species of Foraminifera.

Marl, gray, sandy, like sample at 1010-1020 ft., and much fine to coarse-grained sand washing from the marl; phosphatic nodules, and nodules of pyrite are also present; about 50 percent of the sample is composed of dark-green, irregularly rounded nodules of glauconite. The sample contains fragments of Inoc eramus and shells of other fossil bivalves. The foraminiferal fauna is like that in the sample at 1010-1020 ft., and several species of Globotruncana are common.

Like the samples at 1020-1070 ft., but glauconite is about 25 per. cent of the sample.

Sand, gray, argillaceous, glauconitic. Glauconite is about 50 per. cent of the sample, and the sand is mainly clear, angular, medium grains of quartz. Phosphatic nodules, nodules of pyrite, and fragments of Inocerarnus and othe1 macrofossil shells are present. The foraminiferal fauna is like the sample at 1020-1070 feet.

Sand, fine to very coarse, quartz; coarse grains common; glauconite is about 10 to 25 percent of the samples. Samples contain fragments of sandy clay, pyrite nodules, shell fragments, and specimens of Foraminifera like those in the samples of the beds of Taylor age already described.

Sand, mainly medium to coarse-grained, that seems to wash from a gray, soft marly clay matrix. The sample contains about 25 percent glauconite, a few phosphatic nodules, nodules of pyrite, fragments of Inoce-~am.tts and other shells. Specimens of Foraminifera include species that are characteristic of the lower part of the beds of the Taylor age: Pseudogaudryinella capitosa, Kyphopyxa clwistneri, Planulina durnblei, Globor.otalites conicus, and many specimens of several species of Globotruncana and Globigerina.

No change.

\ .

Like the sample at 1200-1210 ft., but the marly clay is darker

brownish-gray.

No change.

40
D epth (feet)
1420-1480 1480-1510
1510-1570
1570-1600 1600-1630
1630-1840
1840-1870
1870-1900 1900-1930 . 1930-1960 1960-1990
1990-2100

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Beds of Austiri age
Shale, brownish-clay, calcareous.
Like the samples at 1420-1480 ft., and in addition, lenses of very fine-grained sandstone. The microfauna contains a . few specimens of PseudoclfLvulina moorevillensis, and many specimens of PseudogfLudryinel/,a, cwpitosa var. serrulatfL.
Like the samples at 1480-1510 ft. . The material being drilled .seems to be brownish-gray, soft clay shale and interbedded lenses of very fine grained sandstone. This fine-grained sandstone is about 75 percent of the samples. Medium-grained sand and glauconite in the samples is possibly caving. Shale is progressively more dominant with depth. The microfauna is like that in the sample 1480-1510 ft.
Like the.saniples at 1510-1570 ft., and in addition, a few fragments of Citharina texfLna.
Shale, gray, soft, flaky, micaceous; a little fine-grained, argillaceous, calcareous sandstone, and a few phosphatic nodules.
Medium-grained sand and glauconite is possibly caving. No marked change in fauna; a few fragments of OstrefL sp., Inoceramus, and CithtzrinfL texan,a.. Like the sample at 1600-1630 ft., and many specimens of Valvulineria infrequens, many small Gumb elinae, a few specimens of P/,a,nulina austinianfL and CithtzrinfL texana. The samples contain a few specimens of arenaceous Foraminifera that may be caving from higher levels. Shale, gray, micaceous; about 10 percent fine-grained sand, and 5 percent glauconite; a few nodules. of pyrite and phosphatic nodules. The sample seems to contain less sand than those immediately above. The fauna is composed of specimens of Foraminifera like those at 1630-1840 ft., and fragments of OstrefL sp. and Inoceramus.
Shale, gray, a little fine-grained sand, and a few fragments of fine-grained, chalky, micaceous sandstone. No marked change in fauna.
No samples. Like the samples at 1870-1900 ft., fragments of OstrefL sp. and
Inoceramus are somewhat more abundant.
Like the samples at 1870-1900 ft., but the soft gray shale and finegrained sand are each about 50 percent of the sample; a little glauconite present: No change in shell fragments and microfauna.
Like the samples at 1960-1990 ft., with the addition of a few fragments of light-gray, very finely granular limestone. Specimens of Valvulineria infrequens are fairly common in the microfauna.

LoGs OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

41

~r"t..~~

Description

Atkinson Formation. Upper Member.

2100-2140

Lithology and fauna like the samples at 1990-2100 ft., with the
addition of many fragments of white, fne to medium-grained, glauco~itic; micaceous, somewhat phos.phatic sandstone.

2140-2170

Like the sample. at 2100-2140 ft., . and also fragments of light greenish-gniy flaky shale, a little carbonaceous material, a few coarse grains of sand, and a few large phosphatic nodules. ;The samples contain fragments of heavy-shelled Ostrea-like bivalves, specimens of Planulina eaglefordensts, an Eagle Ford type of Valvulineria, a small arenaceous form, and other specimen~? of Fo~~minifera that are caving from higher levels.

2170-22oo

.This sample seems to mark a change from the deeper-water marine facies of the upper Atkinson above, to the ;shallow-water marine
fades, below. Sand, fine to coarse-grained, qti~rtz, in whi~h coarse grains are
common, and a few pink grains are present. The sample contains a few fragments of lignite; phosphatic nodules, nodules of pyrite, shell fragments, and. a few siderite _spherules.

2200-2300

Sand, coarse-gr'ained, quartz, contain'fng a few pink grains, a few
large phosphatic .nodules, and a. few pyritized fragments of
carbonaceous material.

2300-2330
' f ~ .
2330-2360

Like the samples at 2200-2300 . ft.; .also a. fragment of ,Yellow,

, unctuous, sa~~;Y clay and a ~ew side~ite_ spherules.

. .

Sand, moderately coarse-grained, clear,_quar.tz; no colored shale

or siderite.



2360-2390 .
2390-2~0

Sand like the sample at 2330-2360 _ft., and a few fragments of red and grayish-green mottled micacElous shale.
Sand like the saD.lpl~ at 2330-2360 ft.'; no . shale.

2420-2450

Sand and a few fragments of red and grayish-green mottled shale.

2450-2635 . No change.

2635-2650

Sand, medium to coarse-grained, and a few siderite spherules.

2650-2690' 2690-2720 2720-2750 2750-2780

Atkinson Formation. Lower Member

Sand, like sample at 2635-2650 ft., a few fragments of Ostr~a sp., a little dark-gray ,. flaky shale, and a little grayish-green shale.
Like the sample at 2650-2690 ft., but sho~ing an increase in the .
'fragments (}f dark-gray flaky shale. A few small specimens
of arenaceous species ocf Foraminifera are questionably. indi-
genous.

Lithology and microfauna like the sample at 2690-2720 ft., al-

though fragments of soft,' gray, marly shale and specimens of

Foraminjfera .from the beds of Austin age occur as cavings in

this samp_le.



Sand; fine to coarse-grained, fragments of dark-gray and greenish-gray shale, and cavings from higher levels.

42
Depth (feet)
2791
2780-2810
2810-2840
2840-2920 2920-2960
2960-2990 2990-3020 3020-3200 3200-3260 3260-3290 3290-3320 3320-3380 3380-3410 '
34103440 3440-3500 3500-3530 3530-3560

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Core? Sand fine to very coarse-grained, fragments of carbonaceous material, a few nodules of pyrite and many fragments of darkgray flaky shale. The microfauna contains specimens of A-rnmobaculites be1gqttisti and A . agrestis, that are typical of the lower member of the Atkinson Formation.
Sand, fine to coarse-grained, many nodules of .PYrite, fragments of pyritized carbonaceous material, a few phosphatic nodules,
and fragments of heavy-shelled Ostrea-like bivalves.
Sand, fine to very coarse-grained, with coarse grains common; many nodules of pyrite; a little pyritized lignite; a few shell fragments; fragments of several types of clay and shale similar to those observed in samples at higher levels; including fragments of re.d and green mottled shale. The shale fragments are probably .caving.
No change.

Comanche Series undifferentiated

Sand, like sample at 2810-2840 ft., but containing many yellowtinted grains, a little feldspar, and a few fragments of mustardcolored waxy clay, or ochre mudstone, that is slightly gray and red mottled.

.Mainly coarse-grained quartz sand and a little feldspar. . Like the sample at 2960-2990 ft., and many yellow and red coated
and tinted grains, and a little amber and white feldspar. No change.

Sand, like sample at 2960-2990 ft., but medium to moderately coarse grains dominant.

Sand, like the sample at 3200-3260 ft., and a few fragmentS of

purplish-red and gray mottled finely micaceous shale.

Sand like the sample at 3200-3260 ft. This sample contains no

shale.

'

Sand, fine to coarse-grained, containing a few yellow and a few pink-tinted grains, and many grains of feldspar.

Sand, like the sample at 3320-3380 ft.; also .fragments of bright red shale, and dull-red and greenish-gray mottled, highly micaceous shale.
Sand, like the sample at 3320-3380 ft., and a little red shale.

Like the sample at 3320-3380 ft., and a few fragments of dark purplish-red, micaceous shale.

Sand, like the sample at 3320-3380 ft.; and a f ew fragments of red

and dull-green mottled shale.



Sand, and a few fragments of dull-red and yellowish-green mottled

micaceous shale. The ratio of sand to shale is less than in the

immediately preceding samples, and some red shale is probably

being drilled.



LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

43

D ep t h ( f ee t )
3560-3620 3620-3800 3800-3830
.3830-3850

De8cription
Sand, but no red shale. Sand, and a little dull-red and yellowish-green shale. Sand, a little red and mottled shale, and many cavings of clay
from the beds of the Gulf Series. Like the sample at 3800-3830 ft., and a few large pebble-sized
nodules of quartz and of feldspar.

3850-3890
3890-3920 3920-3950 3950-4010 4010-4040 4040-4070 4070-4100 4100-4130 4130-4160 4160-4220
4220-4310 4310-4370
4370-4400 4400-4430 4430-4460
4460-4490 4490-4580

Triassic (?)
.,
Upper Triassic (?) Series
Newark(?) Group
Sand, fine to ve1y coarse-grained, many small pebbles of quartz and feldspar, and a few pebbles of basalt; a few fragments of red shale.
Like the sample at 3850-3890 ft., pebbles are less abundant. Sand, fine to very coarse-grained, a few pebbles, and a few frag-
ments of dull-red and green mottled shale. No change.
Sand, fine to coarse-grained, and cavings. Mainly cavings, and a little fine to very coarse grained sand. Sand, fine to coarse-grained, .quartz; a little feldspar and a few
pebbles.
Mainly cavings, and some fine to coarse-grained sand. Like the sample at 4100-4130 ft., and a few fragments of red and
mottled shale.
Sand, fine to coarse-grained, a few fragments of dull-red and greenish-yellow mottled shale, and abunda;nt cavings from the beds of the Gulf Series.
Sand, white, fine to coarse-grained, quartz; coarse grains common; a very few yellow and pink grains; a little feldspar.
Sand, fine to coarse-grained, quartz, but coarse grains are less common than in the samples at 4220-4310 ft. Sample contains a few pebbles, a few fragments of sandy limonite, and many cavings.
Sand, fine to coarse-grained, quartz, and a few pebbles. Sand, like the sample at 4370-4400 ft., and cavings; each about 50
percent of sample.
Sand, fine to very coarse-grained; a few pebbles and a few fragments of sandy limonite. The sample is small, and before washing, was probably mainly cavings of sandy clay from the beds of the Gulf Series.
No sample.
Sand, fine to very coarse-grained; a few quartz pebbles and a few of sandy Jimonite; many cavings..

44

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

4580-4610 4610-4640

Like the samples at 4490-4580 ft., and a little red mottled shale. Sand, white, fine to coarse-grained, quartz; a few pebble~.

4640-4850

Like the sample at 4610-4640 ft.; a few fragments of :red shale.

4850-4880

Sand, moderately coarse grained; quartz.

4880-5040

Sand, fine to moderately coarse grained, quartz; medium grains common.

5040-5050

Sand, fine to very coarse grained; about 75 percent of sample is cavings from higher levels.

5050-5060

Sand, medium-grained, qua1tz.

5060-5090

Sand, fine to coarse-grained quartz; abundant cavings.

5090-5100

Sand, fine to coarse-grained; a little feldspar.

5100-5170 5170-5180

Mainly cavings from beds of the Gulf Series; a little fine to very
coarse grained sand.
Sand, fine to very coarse grained; a little feldspar i a few pink-
. stained nodules of sandy limestone.

5180-5190

Cavings from the beds of the Gulf Series and a little fine to coarsegrained sand.

5190-5200

Sand, fine to coarse-grained; abundant cavings from beds of the Gulf Series; many fragments of diabase, in part altered or weathered ( ?) .

5200-5260

Diabase. The ratio of _diabase to other materials in the cuttings increases progressively with depth.

5263-5265 T.:p. Core. Diabase..

i : ...

CAM~~N COUNTY

..

..

Landowner: Kraft Corporation

GGS. No. 54

Location: St. Mary's Ga.

Elevation: 13 ft.

(drilled by Layne-Atlantic Co.)

Total depth: 1060

. Completed-: . ?

Fifty-one samples of cuttings were exarrtiried but not described

in detail.r

- .:

Summary of Stratigraphy ,, Tertiary

Depth (!eet)

Thickness (feet)

Pliocene or Pleistocene

0

70

.,

Miocene

lower and middle, Hawthorn Formation -----~-------- 70

420

No samples -------------------------------------~---------------------.:_________ 490

70

'The depth to the top of each stratigraphic unit is. based on ,paleontologic and lithologie data obtained from the microscopic study of the samples.

. ...... . .

...:;

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

45

Depth (feet)

Thickness (feet)

Eocene

in upper, Ocala Limestone, upper member~------- 560

300

lower member_________:_____ 860

170

to upper middle, A von Park Limestone_____________________ 1030 total 30

depth

CAMDEN COUNTY

Operator: The California Company

GGS. No. 153

Landowner: J. A. Buie, Well 1

Elevation: 65 ft. (derrick

...

Location: 4 miles west and 2 miles

floor) Total depth : 4955 ft.

north of Tarboro, Ga.

Completed: Mar. 26, 1948

Latitude 31 03' 01" North

Longitude 81 o 52' 48" West

Lithologic and paleontologic description of side-wall cores.

Depth (feet)
1550
2700 2965 3065 3430
3700 3830

Description
Chalk, white, slightly gray-spotted, porous, highly micro-fossiliferous; fossils are fragmented and calcitized. Fauna contains specimens of Camerina sp. and numerous specimens of Asterigerina texana. Age: early middle Eocene(?)
Dolomite, white, nodular, coarsely crystalline, unfossiliferous. Age: not determined.
Chalk, white, dolomitic, and grayish-green clay shale; no determinable fossils.
. Age: not determined. . Dolomite, white, somewhat chalky, unfossiliferous, and fragments
of nodules of bluish-green glauconite. , .
Age: not determined. Marl, gray, containing fragments of lnoceramms and specimens of
Marginulina inconstantia, Pseudogaudryinella capitosa, Planulina, dumblei. Age: beds of early(?) Taylor age. Marl, gray, and a few green and brown nodules; contains fragments of lnocerantus and specimens of Planulina austiniana. Age: beds of Austin age. Shale, gray, flaky, marly. Fauna contains specimens of Globotruncana (an undescribed Austin form), Citha1-ina texana, Globigerina sp., Gumbelina sp., Gaudryina .sp. (an early Austin form), and ostracodes. Age: beds of early Austin age.

46
Depth (feet)
3840 3905
3948 4015 4075 4125
4290
4385 4392 4555 4690

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Marl, brownish-gray, light-speckled, and unidentified green nodules. Age: beds of Austin age.
Marl, gray, containing fragments of specimens of a thin-shelled species of Inoceramus, crushed specimens of Globige1-ina sp. and Citharin.a texan.a (common), and specimens of Ga~uiryina austin.ian.a and Planulina austiniana. Age: beds of Austin age.
Marl, dark gray, light-speckled, containing specimens of Giimbelina sp. and Globigerina sp. Age: beds of Austin age.
Marl, gray, hard, containing specimens of Globigerina sp., and a few specimens of Giimbelina sp. and Globotnmcana sp. Age: not determined.
Like side-wall core at 4015 ft. Marl, gray, containing a few fragments of fish bones and speci-
mens of Globig erina sp., Plan.ttlina eaglefordens~s (common), and Valvulin.eria inj?equens. Age: upper membe1 of Atkinson Formation. Shale, grayish-green, flaky, micaceous, containing many irregularshaped siderite nodules. The fauna is composed of a few fish scales and fragments of fish bones, a few shell fragments and specimens of Planulin.a eaglefordensis which may have caved. Age: upper member of Atkinson Formation (?) Shale, -dark-gray, hard micaceous. Age: lower member of Atkinson Formation ( ?) . Shale, -green, somewhat sandy in irregular a1eas, micaceous; contains a few moderately coarse grains and many green grains. Age: lower member of Atkinson Formation (?). Sand, moderately coarse, many green grains and a littl!! pink feldspar. Age: Comanche ( ?) . Igneous rock ( ?) Age : not determined.

CHARLTON COUNTY*

Owner Operator: State of Georgia, State Prison Camp (Folkston) Well 1

:75 GGS. No. 185
Elevation: ft.

*Publication of this data is authorized by the Sun Oil Company, for whom the report was prepared on a commercial basis.

r

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

47

Location: About 1 mi. south of Folk- Total depth: 554 ft. ston, Ga., and 3 mi. north of bend in Completed: January 1941. St. Marys River at Twp. 4N., Rge.
23E., Nassau County, Fla.

Summary of Stratigraphy

Depth (feet)

Thicknes s (fe et)

Tertiary

In Miocene undifferentiated _______________:___________________________ 90

326

(1st sample)

Oligocene absent No samples ----------------------- - ----- - ---- 416 Eocene

. 14

to upper, Ocala Limestone, upper member.~----'---------~--- 430 total 124
depth

Lithoiogic and paleontologic description of cuttings and cores. Samples are cuttings unless otherwise stated.

Depth (fee t)
0- 90

No samples.

Description

90- 100 115- 125 118- 128
128- 138 138- 149
149- 158 158- 168 168- 182 184- 194 194- 215

Tertiary
In Miocene _Series, undifferentiated
Limestone, gray, sandy, nodular, porous; a few nodules contain fragments of macrofossils.
Clay, light-tan, highly sandy, containing many black phosphatic nodules, and a few worn fragments of a fossil bivalve.
Clay, gray, waxy, slightly _carbonaceous, irregularly sandy, containing small fragments of fragile chalky shells, and a few poorly-preserved, chalky molds of specimens of Foraminifera; Rotalia beccarii common.
No samples. Clay, greenish-gray, highly sandy. The sand is clear quartz and
very uneven grained. The clay contains many large, black, phos"r phatic nodules, and many worn and fragmented shells of fossil bivalves. No samples. Like sample at 138-149 ft., but shell f~agments are rare. Like sample at 158-168 ft. Like sample at 168-182 ft., but the sand is finer grained. No change.

48

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
215- 225 225- 248 248- 258 258- ' 267
267- 277 278- 286 286- 307 307- 317
317- 327 327- 357 357- 367 367- 386 . 386- 396 396- 406
406- 416
416- 430

Description

No samples.

Sand, quartz, clear, uneven-graiped (very fine to-coarse), containing many black to brownish-black phosphatic nodules.

Sand, quartz, clear, coarse-grained, containing many moderately

large, black, phosphatic nodules.



Clay, light-brown, gritty, highly sandy, phosphatic, containing a few calcareous nodules, and a few shell fragments that are possibly caving from higher levels.

Clay, greenish-gray, phosphatic, highly, sandy (very uneven grained clear quartz sand)' containing a few calcareous nodules.

Clay, grayish-tan, somewhat phosphatic, highly sandy (moderately fine, moderately even grained, clear quartz sand) . .

Clay, tan, somewhat calcareous, somewhat phosphatic, highly sandy (very uneven grained sand).

Sand, quartz, clear, moderately fine grained, moderately even

grained (a few coarse grains), containing a few phosphatic

n~u~L

'

No samples.

Like sample at 307-317 ft.

Like sample at 307-317 ft.; sand is chiefly coarse-grained.

No change.

Like the preceding samples, but sand is chiefly fine-grained.

Clay, brown, gritty, calcareous, somewhat phosphatic, highly sandy; imd black, carbonaceous clay. Nodules of the brown calcerous clay contain a f ew small fossil bivalves (Miocene forms) .

Sand, quartz, clear, tan; argillace-ous, slightly calcareous, finegrained, moderately even grained, containing a few phosphatic nodules.

.No samples.

Eocene Series

445- 5'1.7 . 517- 526
626- 540

. Upper Eocene. Ocala Limestone. Upper Member.

Sand, quartz, clear, angular, moderately . fine grained, moderately

even grained, and about 10 percent small fragm ents of chalky

limestone. A fragment of Operculina sp., and a bryozoan frag-

ment occur in the limestone.



No samples.

Limestone, white chalky, containing many fragments of Operculina floridensis, many bryozoan fragments, and a few specimens of smaller Foraminifera common in the Ocala Limestone.

. Limestone, chalky, fossiliferous, like sample at 517-526 ft., and
about 50 percent fine-grained clear quartz sand that is probably
caving from higher levels. The sample contains. specimens of a species of Bryozoa ~haracteristic of the Ocala Limestone, and the microfauna is like that in the preceding sample.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

49

Depth (feet)

Description

542- 547 Limestone and . a little sand like sample at 526-540 ft.

547- 554 T .D. No change.

. CLINCH COUNTY
'

Operator: Sun Oil Cotripany

GGS. No. 144

Landowner: W. J. Barlow well 1

Elevation: 177 ft. (derrick

floor)

Location: Land District 12, Land Lot Total depth: 3848 ft.

373, 1478 ft. north and 1754 ft. east Completed: March 5, 1947

of southwest corner of Land Lot

373.

Summary of Stratigraphy

Tertiary

Depth (feet)

Thickness (feet)

Eocene

.

.

In middle, undifferentiated at 2100 ft. __________c________ ?

lower, clastic beds of Wilc<;>x( ?) age_ _______________ 2260

Salt Mountain Limestone___:_____~----- 2320
Pal~c~~e, beds~ containing .Tamesi faun~---~---~---.--- 2420

?
60 100
435

.J bJ L

Cretaceous

Gulf"

~ ~, r

Beds of Taylor age_________ ___________ -~~----------_:______ 2855

200

Beds of Austin age_~--------------~--------------:____:__~------------- 3055

305

Atkinson Formation, upper member_________________ 3360

248

lower member..:.....______________..-.. _ 3608

181

Comanche undifferentiated _______ _.-~---------~:__:_____ 3789

45

.. ." ~ :

Ordovician1

~ .

~

Lower Ordovician(?) quartzitic sandstone----------~- 3834 total 14

.~

depth

Lithologic and paleontologic description of cut-

tings and cores. Samples are cuttings unless

otherwise stated.





1Bridge, Josiah, and Berdan, J . M., 1951 , U.S. 'Geol~ical Survey open file report, p _ 6, 6, and

map.

.



~

,;-,;.''

50
Depth
(feet)
0-2100
2100-2120
2120-2130
2130-2140 2140-2150
2150-2160 2160-2170 2170-2180 2180-2200 2200-2210
2210-2220
2220-2230 2230-2240 2240-2260
2260-2280
2280-2300
2300-2310

GEORGlA GEOLOGICAL SURVEY BULLETIN 74

Description
Samples not studied.

Eocene Series In middle Eocene, undifferentiated

Limestone, white, irregularly sandy (fine-grained sand) ; glauconitic, and a few fragments of light-tan chert. Sample contains a few small specimens of nondiagnostic species of Foraminifera.

Like sample at 2100-2120 ft., and in addition;many fragments of light grayish-cream, highly glauconitic, sandy (fine-grained
sand) limestone. Like the sample at 2120-2130 ft., but few fragme~ts of dark ghiu-
conitic limestone.

Limestone, white, somewhat glauconitic, and fragments of light grayish-tan chert. A few specimens of several species of Foraminifera, including a specimen of Asterigerina sp.

Limestone and chert like the samples at 2100-2150 ft., but some fragments of limestone are highly glauconitic.

Like sample at 2150-2160 ft., and many fragments of white, chalky, dense, cherty limestone; chert abundant.

Limestone, glauconitic, many fragments of chert, and a little wh'ite ash.

Limestone and chert, like sample at 2170-2180 ft.

'

Limestone, slightly glauconitic, fr.agmental, porous, composed of a mass of small flagments 'of chert-cemented calcite that al;e probably derived from molds of altered fossil material.

Limestone, like the sample at 2200-2210 ft., containing many inclu-

sions of calcite; many moderately large irregular-shaped nogules

of calcite, and a little chert.

-,.

Limestone, light-cream, fragmental, slightly - glauconitic; much light-tan chert.

Like the sample at 2220-2230 ft., but some fragments of limestone are highly glauconitic.

Limestone, fragmental, and a little chert, like the sample at 2230-2240 ft. A section of Disr:ocyclina sp. in the sample at 2240-2250 ft. Lower Eocene. Clastic beds of Wilcox(?) age.

Shale, light-green, micaceous; a few fragments of limestone and a little chert like that described in the samples of the middle Eocene beds.

Like the samples at 2260-2280 ft;, and many specimens of small Foraminifera; Globig erina sp., 01bulina sp., and Discorbis sp. are common.

Shale, like the samples at 2260-2300 ft., and many fragments of light greenish-gray, highly glauconitic, irregularly sandy, porous limestone, streaked with thin veins of chalcedony. Limestone

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

51

Depth (feet)
2310-2320

Description
contains sections and small specimens of A sterocyclina sp. and a few bryozoan fragments. Shale, light-green, highly glauconitic, irregularly sandy, containing phosphatic nodules and nodules of glauconitic limestone. A few nodules contain fragments of Discocyclina sp.

2320-2340 2340-2350 2350-2380 2380-2390 2390-242_0
2420-2440
2440-2460 2460-2480 2480-2490
2;4,90-2540 2540-2550

Lower Eocene. Salt Mountain Limestone.
Limestone, white, fragmental, somewhat glauconitic, that seems to be composed of worn, chalky, calcitic molds and fragments of fossils. A few specimens of Discocyclina w eaveri are present, and AsteTig erina sp. is common .
Like sample at 2320-2340 ft., and many fragments of light grayishbrown, micaceous, fossiliferous chert.
Limestone,. fragmental, somewhat glauconitic, composed of tests and altered fragments of macrofossils and microfossils; among the latter is Discocyclina weaveri.
Limestone, finely fragmental, "somewhat sandy and glauconitic. Like the sample at 2380-2390 ft., but the sand content "of the lime-
stone is between 50 and 75 percent; fine-grained, eyenly distributed glauconite is about 25 percent. The sample at 2410-2420 ft. contains a little fine-grained, calcareous, glauconitic sandstone.
Paleocene Series
Beds containing Tamesi fauna
Clay, soft, which, when washed, leaves a moderately large residue of fine-grained, angular clear quartz sand arid a few fragments of calcareous sandstone like samp~e at 2410-2420 ft. Sample contains a few phosphatic nodules. Fairly common specimens of Foraminifera are: DaTbyella? sp., Lenticulina degolyeri, Nodosaria latejugata, and Globigerina sp.
Like sample at 2420-2440, and a few specimens of other small Foraminifera.
.Clay, sandy; washed residue composed of sand and a few phosphatic nodules like sample at 2420-2440 ft., fragments of calcerous, glauconitic sandstone, and specimens of small Foraminifera.
Like samples at 2460-2480 ft. Microfauna contains specimens of Nodosaria latejugata, Lenticulina degolyeri, and Darbyella? sp. like sample at 2420-2440 ft.; many specimens of Globigerina triloculinoides, and Cibicides cf. C. praecu?'SO?'ius; Globorotalia acuta, G. velascoensis, and Eponides lotus are common.
No change. Moderately large washed residue composed of sand like sample at
2420-2440 ft., fragments of light-green, micaceous clay shale,

52
Depth (feet)
2550-2610 2610-2620 . 2620-2630 2828
2630-2860
2860-2880
2880-2890 2890-2900 2900-2940 2940-2950

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
and many fragments of light-gray, highly sandy (fine-grained sand), finely glauconitic limestone that is possibly nodular in
en,the clay shale, Specimens of Da1byella? sp., L enticulina. degoly~ and Nodosaria latejugata very common; Globigerina sp., G. triloculinoides, and other small Foraminifera, like sample at 2480-2490, are also present. No change. Like samples at 2540-2610 ft.; also abundant fragments of white, hard, dense, slightly glauconitic limestone; and several fragments of light-gray, fragmental, porous, slightly glauconitic limestone. Sample seems to be a mixture of materials described from higher levels. Sidewall core 64. Recovery 1 in . . Clay, bluish-gray, slightly micaceous, somewhat glauconitic, highly calcareous, containing much comminuted microfossil material. Glauconite occurs as small bluish-green nodules. Microfossils are common, but are usually chalky, very small, and poorly preserved. The fauna, which is Paleocene in age, contains specimens of Cibicides _sp ., Anomalina. sp ., and Globigeriita, trilo~ ettlinoides.
Cutting samples not studied.
Cretaceous
Gulf Series
Beds of Taylor age
The top of the bed~ of Taylor age is placed at 2855 ft. on the basis of electric log correlation supported by the data from samples. Chalk, white, and cavings of light-green shaly clay. Fragments of
Inoceram-us wash from the chalk, and Inoceramus fragments and prisms are abundant in the sample. Specimens of Foraminifera and Ostracoda are common. Dominant" species of Foramini.fera are Dorotkia canula, Planulina. cedarkeysensis, and .Planulina dumblei.
Like the samples at 2860-2880 ft,; numerous specimens of Arenob1dimina. americana., and a few ~pecimens of Kyphopy:r;a christneri.
Material and fauna like the samples of chalk in the beds of Taylor age at 2860-2890 ft.
Like the sample at 2890-2900 ft., but cavings of light-green clay shale are very abundant.
Chalk, white, and Inoceramu s fragments about 50 percent of washed sample; cavings of light-green clay shale about 50 percent of washed sample. Foraminiferal fauna contains species listed in samples at 28602880 ft. and 2880-2890 ft.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

53

Depth (feet)
2950-2960
2960-3000 3000-3010 3010-3060 3060-3070
3070-3080 3080-3090 '
3090-3120 3120-3130

Description
Chalk, white, soft. The small washed residue of this sample is composed mainly, of Inoceramus prisms and fragments, and many specimens of Foraminifera. Globointncana sp., Globigerina cretacea, and Gumbelina -sp. are the most common species; Kyphopyxa christneri, Pseud&gaudryinella capitosa, Robulus spp., and Marginulina spp. are also common. A few specimens of Globorotalites umbilicatus, Eouvigerina americana, Heterostomella austiniana, and Planulina austinia.na are present. On the basis of the microfauna, the age of the containing beds is classified as early Taylor or late Austin.
No change.
Limestone, light-gray, chalky, and nodules of pyrite. The small washed residue contains fragments of Inoceramus and Ostrealike bivalves, and a foraminiferal fauna similar 'to that in the sample at 2950-2960 ft.
No change.
Beds of Austin age
The top of 'the beds of Austin age is placed at 3055 ft. on the .basis of electric log correlation supported by the data from samples.
. Limestone, white, hard, chalky, containing much comminuted, calcitized fossil debris. Fragments of the limestone show masses of Olig.ostegina that are common in the beds of Austin age. Fragments of Inoceramus and shells of other fossil bivalves are common. The microfossil material is usually poorly preserved, and no species having a narrowly. restricted vertical range were identified.
Limestone, like the sample at 3060-3070 ft., and a little gray marl. .The sample contains many fragments of Inoceramus and shells of other fossil bivalves; the microfossil material is like that in the sample at 3060-3070 ft.
Marl, gray; many fragments of In,ocerri.mus; a few fragments of moderately hard, white, limestone, like 'the sample at 3060-3070 ft.; abundant nodules of pyrite.- The foraminiferal fauna is composed, largely, of specimens of Globigerina cf. G. cretacea, and Gumbelina cf. G. moremani; specimens of Valvulineria sp. and Planulina austiniana are common; .a few specimens of Globotruncana sp. and Dorothia. cf. D. alexanderi (often common in the lower part of the beds of Austin age) are present. Specimens of ostracodes and a few specimens of arenaceous species of Foraminifera also occur in the sample.
No change.
Shale, gray, marly, and harder than in the sample at 3080-3090 ft. The microfauna is composed almost entirely of specimens of Globigerina sp. and Giimbelina reussi, and a few specimens of Planulina cf. P eaglcfordeWJis and Globotruncana sp.
Like the .sample at 3120-3130 ft.

54
Depth
(feet)
3160-3170
3170-3180 3180-3210 3190
3210-3270 3233
3233
3262
3270-3310 3303

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Like sample at 3120-3130 ft. The microfossil specimens are larger and more abundant than in the sample at 3120-3130 ft., but Globigerina spp. and Gii.mbelina spp. are still strongly dominant in the fauna; Globot1-uncana spp. are somewhat more common; fragments of Citharina texana are very common. C. texana is

common near the base of the Mooreville chalk of Austin age at the outcrop in Alabama, and one of the species of Globotruncana is also common in the lower part of the Austin chalk.

Like the sample at 3160-3170 ft.; Citharina texana is much less abundant.

Material and fauna like the preceding samples of the beds of Austin age are mixed with cavings from much higher levels.

Side wall core 65. Recovery 1-3/4 in. Shale, greenish-gray, flaky, marly, slightly micaceous, containing Inoceramus fragments, a few fragments of fish bones, and abundant specimens of Globigerina cf. G. C1etacea, Gumbelina reussi, Globotruncana spp. (including an undescribed form characteristic of the beds of Austin age), and Anomalina sp. (small).

Shale, gray, marly, and fauna like the sidewall core 65 at 3190 ft.

Side wall core 66. Recovery 1-1/4 in.

Marl, light bluish-gray, chalky, containing abundant fragments of Inoceramu s and shells of other fossil bivalves, and many specimens of Foraminifera like those in sidewall core 65 at 3190 ft. Also, specimens of N eobulimina canadensis, Palmula suturalis, Palmula pilulata, and Valvulineria infrequens. Specimens of

ostracodes are common: Cythere cornu ta var. and Cytherella sp.

Sidewall core 67. Recovery 1 in. Shale, gray, marly; Inoce1amus prisms and fragments are com-

mon. T)le microfauna is composed of specimens of several species of ostracodes, and specimens of Globigerina sp., Globotruncana marginata. KyphO'fYYxa ch?-istne?i, Gumb elina r eussi, Valvuli-

neria infrequens (Austin var.), Nodosat'ia sp. (fragments), Planu lina austiniana, Robulus ?nunsteri, and Marginulina inconstantia?.

Sidewall core 68. Recovery 1h in. Chalk, light-gray, marly, typically Austin in character; contains specimens of Oligostegina, Inoceramus fragments and ostracodes, and abundant specimens of Foraminifera: Globigerina sp., Gi.imbelina teussi, Globotruncana spp. fairly common, and a few specimens of a small Anomali?ta sp.

Shale, gray, marly, and abundant fragments of dark brownish gray

somewhat light-speckled and light-streaked shale.



Sidewall core 69. Recovery 1 in. Marl, gray, streaked and speckled with white_ chalk, highly microfossiliferous. The fauna is composed, mainly, of specimens of Globigerina sp., Gumb elina reussi, Globot1-uncana area, Planu-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

55

Depth (feet)
3310-3320 3316 3320-3330 3324
3330-3350 3335
3350-3360

Description
lina t exana, and Pleur.ostomella watersi.
No samples.
Sidewall core 70. Recovery 1/4 in. Chalk, white, marly; fauna like sidewall core 69 at 3303 ft.
No samples.
Sidewall core 71. Recovery 1 in. Shale, greenish-gray, marly, sandy (fine-grained sand), glauconitic, micaceous, containing phosphatic nodules. The fauna is composed of fragments of fish bones, Inoc eramus, and other fossil bivalves, specimens of several species of .ostracodes, and specimens of Foraminifera: Globigerina spp. Gumbelina reussi, Gumbelina m oremani, Glob otruncana a1ca var., Planulina texana, Palmu la pilu lata, Marginu lina austiniana.
Shale, gray, and .some speckled shale; no change in fauna. Sidewall core 72. Recovery 1'4 in.
Shale, gray, marly, highly microfossiliferous. The fauna is composed of fragments of Inoceramus and fish bones, specimens of ostracodes, and specimens of .Foraminifera; Globigerina sp., Globotruncana mca, var., Globorotalia C'ushmani? , Guembelina reussi, Gumb clina moremani, Maiginu lina au stiniana, Planu lina t exana ?.
Material and fauna like samples at 3330-3350 feet; also many fragments of white, moderately coarse grained, clear quartz sandstone, containing many phosphatic nodules, nodules of pyri,te, and worn fragments of fossil bivalves.

3360-3366 3366-3367 3367-3372
3372-3382

Atkinson Formation. Upper Member.
Core 6. Recovery 8 in. Sandstone, white, dense, calcareous, quartz; contains phosphatic nodules and fragments of Ostrea-lik e bivalves.
Core 7. Recovery 5 in. Sandstone, grayish-white, moderately fine gra~ned, calcareous, quartz, containing mica, glauconite; fragments of lignite and fossil bivalves.
Core 8. Recovery 5 ft. Top lh ft. Sandstone, light-gray, hard, d~nse, micaceous, somewhat fossiliferous, containing fragments of fossil bivalves.
Middle 2 ft. Sandstone, light greenish-gray, soft, fine-grained, argillaceous, micaceous, containing small, black, phosphatic nodules, and thin lenses of gl'ay and greenish-gray flaky shale.
Bottom 2% ft. Sandstone, soft, like middle 2 ft., but the sand grains are slightly coarser. The sandstone contains inegular thin lenses of gray and greenish-gray; somewhat sandy and micaceous shale.
Core 9. Recovery 10 ft. Top 4 ft. Siltstone and sandstone, greenish-gray, soft, fine-

56
Depth (feet)
3382-3392.
3392-3401 3401-3411
3411-3421

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

grained, .argillaceous, micaceous, glauconitic, pyritic, containing

a few lenses of greenish-gray, flaky, sandy (fine-grained sand),

micaceous shale.



Middle 3 ft. Shale, grayish-green, thinly laminated, and white, highly micaceous siltstone, containing a few fragments of carbonaceous material and a few nodules of pyrite. Parts of the core are predominantly shale that is micaceous, irregularly silty, and somewhat carbonaceous.

Bottom 3 ft. Sandstone containing lenses of shale. The sandstone is white, dense, fine to moderately fine grained, angular, clear quartz, containing many phosphatic nodules and a few shell fragments. The shale is greenish-gray to green, usually micaceous and somewhat carbonaceous.

Core 10. Recovery 7 ft.

.

Top 5 ft. Shale, grayish-green, irregularly silty, micaceous,

somewhat carbonaceous, containing lenses of light-gray mica-

ceous, containing lenses of light-gray micaceous siltstone, and

specimens of a small Globigerina sp., Gumbelina moremani,

Gumbelina reussi, and Planulina eaglef(rrdensis. A few thin

lenses of hard sandstone occur in the shale.

Bottom 2 ft. Sandstone, light greenish-gray, fine-grained, micaceous, argillaceous, slightly glauconitic; contains carbonaceous material and fossil bivalves.

Core 11. Recovery 4% ft. Top. Shale, light-gray, slightly micaceous, containing a few lenses of soft, fine-grained, micaceous sandstone.

Middle. Sandstone, white, dense, hard, somewhat glauconitic, containing a few phosphatic nodules and many fragments of

fossil bivalves.

Bottom 1% ft. Shale, grayish-green, and moderately fine-grained quartz sandstone containing phosphatic nodules.

Core 12. Recovery 7 ft. Top 1% ft. Shale, greenish-gray, and a little white, dense, moderately fine-grained sandstone containing many worn and broken fragments of Ostrea sp., bryozoan fragments, and phosphatic

nodules.

Middle 2% ft. Shale, light grayish-green, irregularly silty, micacaceous, containing irregularly distributed soft, micaceous, slightly glauconitic siltstone.

Bottom 3 ft. Shale, light greenish-gray, silty, micaceous, carbonaceous, containing many phosphatic nodules, a little glauconite, many small fragments of Os.trea sp., and a few specimens of

Ostracodes.

Core 13. Recovery 2% ft. Sandstone, light greenish-gray, soft, argillaceous, micaceous, glauconitic, containing a few shell fragments and phosphatic nodules.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

57

Depth (feet)
3421-3430
3430-3440
3440-345.0. 3450-3460
3460-3470 3470-3480
3480-3488
3488-3498

Description

Core 14. Recovery 4ft. Top 2 ft. sandstone, light greenish-gray, argillaceous, highly micaceous and glauconitic; contains phosphatic nodules and fragments of fossil bivalves.

Bottom 2 ft. shale, grayish-green, somewhat micaceous, containing scattered grains of sand, fish bones, and a trace of glauconite.

Core 15. Recovery 8 ft. Top 5 ft. Sandstone, argillaceous, fine to moderately fine grained, micaceous, glauconitic; contains fragments and molds of fossil bivalves, and some fragments of phosphatlze.d bones.

Bottom 3 ft. Sandstone, light-green, soft, argillaceous glauconitic; contains a few shell fragments and small phosphatic fragments.

Core 16. Recovery 7 ft.

No change.

Core 17. Recovery 9 ft;

Top. Sand, like core 16 at 3430-3440 ft., containing thin, irregu-

lar lenses and splotches of grayish-green shale. The material is

slightly glauconitic, phosphatic, and fossiliferous (fragments of

Ostrea sp.).



Middle. Like the top part of the core, but more glauconitic. Bottom. Like the middle part of. the core.

Core 18. Recovery 2 ft. .

-No change.

..,

Core 19. Recovery 1lh ft. .Top. Sandstone, white, hard, and green, soft, sandy clay. The sandstone. is dense, fine to moderately fine grained, calcareous, and contains abundant fragments of white, chalky, shell fragments and_many nodules .of .glauconite and phosphatic material. _T~e green clay is highly sandy and contains a few shell fragments.

BottOm. Sandstone, lightgray, dense, containing shell fragments and nodules of both glauconite and phosphatic material.

Core 20. Recovery 3 ft.

Top. Sandstone, greenish-gray, glauconitic, phosphatic, like core 19 at 3470-3480 ft., and lenses of thinly flaky green shale. The . sandstone contains shell fragments.

Bottom. Shale, grayish-green, flaky, intei'laminated with lightgray,"soft, very fine grained, argillaceous, micaceous, phosphatic, glauconitic sandstone.

Core 21. Recovery % ft. .

Sandstone, light greenish-gray, very fine grained, in part dense, and in part argillaceous; contains mica, shell fragments, phosphatic nodul~s,- and many irregular-shaped, gray nodules of calcitic limestone.

58

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

3498-3508

Core 22. Recovery 4lh ft. Top. Sandstone, light grayish-green, shaly, micaceous, and lenses of dark g1ayish-green, thinly flaky shale; contains a fe>v shell fragments, phosphatic nodules, and a little glauconite.

Middle. Shale, green, micaceous.

Bottom. Shale, like middle part of core, irregulax:ly streaked with micaceous, pyritic, slightly carbonaceous siltstone; contains a few specimens of Ostracodes.

3508-3518

Core 23. Recovery 7 1.6 ft. Top. Shale, like the middle and bottom parts of core 22 at 3498-3508 ft., containing many sandy areas. Fauna consists of a few fragmentary fish bones and a few small specimens of Globigerina cf. G. cretacea.

Middle. Sandstone, light greenish-gray, moderately soft, micaceous, somewhat phosphatic, and containing brown carbonaceous fragments; a few lenses of flaky green shale in the sandstone.

Bottom. Shale, green, irregularly sandy (fine-grained sand), micaceous, carbonaceous.

3518-3528

Core 24. Recovery 7 ft.

Top 3 ft. Shale, like bottom part of core 23 at 3508-3518 ft.

..,..
.. ~

Part of this section of core 24 is sandy, (coarse-grained sand),

and contains many phosphatic nodules, nodules of pyrite, and

fra-gments of Ost1ea sp.

Middle 3 ft. Sandstone, light greenish-gray, soft, argillaceous, micaceous, glauconitic, pyritic, and a few thin, irregular lenses of green shale.

Bottom 1 ft. Sandstone, light greenish-gray, fine-grained, argil-
laceous, micaceous; contains a few fragments of carbonaceous
material, phosphatic nodules and Ostrea sp.

3528-3538

Core 25. Recovery 7 ft. Top. Sandstone, fine to moderately fine grained, slightly glauconitic, phosphatic, and pyritic, irregularly interbedded with green, micaceous, somewhat carbonaceous shale that occurs in lenses of variable thickness.

Middle. Like top of this core.

Bottom. Sandstone, white, hard to moderately hard, fine to moderately coarse grained, containing a few phosphatic nodules, a few nodules of glauconite, and chalky fragments of fossil bivalves.

3538-3548

Core 26. Recovery 3 ft. 8 in.

Top 30 in. Sandstone, light greenish-gray, soft, glauconitic,

micaceous, somewhat carbonaceous, containing a few inclusions

and thin lenses of shale.

Middle. 6 in. Sandstone, soft, argillaceous, somewhat glau~onitic,

micaceous, and carbonaceous, irregularly interlaminated with

shale and siltstone.

,.

LOGS OF SELECTED WELLS IN .THE COASTAL PLAIN OF GEORGIA

59

Depth (feet)
3548-3558
3558-3560 3560-3570
": 3570-3578 3578-3588

Description

Bottom 8 in. Sandstone, light greenish-gray, argillaceous, mica~
ceous, containing many fragments of lignite, a little phosphatic
material, and a few fragments of glauco~ite-coated shells.

Core 27. Recovery 6lh ft.
Top lh ft. Sandstone like bottom of core 26 at 3538-3548 ft., and
irregular thin lenses of shale.

2nd 1 ft. Sandstone, light-gray, moderately hard, argillaceous, containing many shell fragments and black, phosphatic nodules, a little glauconite and mica, and a few thin irregular lenses of green shale. 3d 1 ft. Like the second foot, but containing a few rather large fragments of lignite. 4th 1ft. Sandstone, light greenish-gray, soft, micaceous, contaiii'ing a .few shell fragments and thin lenses of shale. 5th 1% ft. Sandstone, light greenish-gray; soft, argillaceous micaceous, containing a few shell fragments, phosphatic nodules and a little carbonaceous material. 6th 1% ft. No sample?

Core 28. Recovery 2.! ft. Top. Sandstone, light-gray, moderately hard, argillaceous, containing irregular laminae of. green shale. The sandstone is micaceous, slightly glauconitic and carbonaceous, and contains a little magnetite and a few shell fragments.

Bottom. . Like the top part of the core, but softer and contains phosphatic material.

Core 29. Recovery 7 ft.

!

Top 2 ft. Shale, greenish-gray, micaceous, silty, containing

. abundant fragments of Ostrea ap.; small fragments of carbo-

; naceous material are fairly common.

Bottom 5 ft. Sa.ndstone, grayish-green, fine-grained, micaceous,

irregularly streaked with shale laminae, and containing many. fragments of Ostrea sp. and a few phosphatic nodules.

Core 30. Recovery 4% ft.
a Top. Sandstone, light greenish-gray, soft, argillaceous, glauco-
nitic, micaceous, containing fewshell fragments and thin lenses of grayish-green flaky shale.

Bottom. Sandstone similar to the top part of the core, containing small carbonaceous fragments and irregular thin streaks of
shale~

Core 31. Recovery 6% ft. ') Top 2 ft. Like the bottom of core 30 at 3570-3578 ft., but frag-
ments of lignite and small fragments of carbonaceous material are abundant.

Bottom 4lh ft. Sandstone, light-gray, moderately hard, calcareous, micaceous, containing . abundant fragments ef Ostrea sp., many small phosphatic fragments, and a little glauconite and carbonaceous material.

6Q

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

3588.3598
;"-,

. (
' ;..:

. . ~.
,; .

Core 32. Recovery 5.! ft. Top 1.! ft. Sandstone, lig~t greenish-gray, shaly and highly sandy clay shale. Parts of the core are white, hard, nodular, sandy (very fine grained sand) limestone, in which shell frag. ments and small phosphatic nodules are common.
Middle 3 ft. Sandstone, light greenish-gray, hard, and a few irregular lenses of green, micaceous silt. Thfi! sandstone is glauconitic and contains many fragments ,of fossil bivalves and gastropods, and a few fragments of lignite.

Bottom 1 ft. Sandstone like middle part of core, and lenses of grayish-green, micaceous shale that is usually silty and in places highly carbonaceous.

3598-3608

Core 33. Recovery 5% ft.

,.

Top 2ft. Shale, grayish-green flaky, containing lenses composed .

( . .~. ' .; ' '1 .

of mica and moderately small fragments of lignite.

Mid<ne 2 ft. Sandstone, light-gray, moderately soft, fine-grained,

micaceous, argillaceous, containing fragffients of Ostrea sp., and

a few very thin lenses of shale.
Bottom 1lh ft. Sandstone, iight-gr.ay,~ very fine grained, mi-
' . caceous and somewhat glauconitic. This 'part of the core is very

dense and hard in places, and contains abundant small fragments

of fossil shells.

I . : ,j:i:"'

Atkinson Formation. Lo~~r M~rttber .~ '

3608-3615

~

. r.

'T .

Core 34. Recovery 5lh ft.

I .

.i'

Top. Sandstone; like bottom part of core 33 at 3598-3608 ft.;

contains moderately large areas of white sandy (fine-grained

sand) limestone containing shell fragments. This part of the

core seemed to be conglomeratic when first exposed.

Bottom. Shale, grayish~green', sandy, slightly. glauconitic, con~

,taining abundant worn and broken fragments . of shells, and many specimens of Valvuli-neria i-nfrequ.e-ns.:: (Eagle Ford va~

riety), a few spedmens of arenac~ous species of Foraminifera,

and a few ostracodes.

.

3615-3625
.":1 -

Core 35. Recovery 4 ft. Top. Shale, greenish-gray, sandy, micaceous, containing many fragments .of macrofossils, a trace of glauconite, a few large, calcareous nodules, and specimens of Va~vttlineria infrequens.

. Bottom. Lilte the top part of the core; and containing a ew

" '

;! .,..

~... . ;fragments \of carbonaceous material. No change in microfauna. . In this p~rt .of .the core a lens of light green, hard, sandy lime-

stone contains abundant fragments of fossil bivalves, a few frag-

.; .,: '.. .. me.nt~ ?flignite,. a trace of glauconite, and a little mica.
3625-"3629 , ,H Core 36. Recovery 4 ft.

. . . . Top. Shale,_grayish-green, . flaky, ,.somewhat micaceous, and a

few fragments of lime1!tone like that hi the bottom part of core

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

61

Depth (feet)

Description

35 at 3615c3625 ft. The shale contains highly micaceous and carbonaceous partings, many specimens of .. Globigerjp,a sp., Giimbelina sp., and Planulina sp., and a few specimens of small
, arenaceous species of Foraminifera.

3629-3639 .
'

Core 37. Recovery 4 ft.

.;

Top. Shale, gray, flaky, micaceous, . somewhat carbonaceous; contains a foraminiferal fauna in which"'speci~ens of arenaceous

species are strongly predo-minant: Ammqbaculoides plummera.e

(common), Ammobaculites adv_enus (p!esent),.

: : .:

Middle. Like the top part of the core; a few fragments of

macrofossils present.

' .. ' .



I



~~

I '

:



Bottom. Shale ~ike the top part of the core con~aining fragments

of carbonaceous material (common), a few fragments of macro-

3639~3649

fossils, and a few fish scales.

'

. .

Core 38. R ecovery 10 feet.

.

.. . Top. Shale, greenish-gray, mi~aceous, slightly silty; contains

: ,, specimens and fragments of fragile, thin-shelled macrofossils,

.i . young specimeris of Ammobaculites advenus, and a few speci-

~- ..

mens of osb.acodes.

.

Middle. No change. Bottom. No change.

j'
,

3649-3659

Core 39. Recovery 9 ft.

. -"J

~ t~ Top. Shale, gray, micaceous, containing irregularly distributed

silty areas, and very. thin shelled _macrofossils.

Middle. No change.

''Bottom. No change.

C~re 40. Recovery 10 ft.

, ~- .,,,

Top 8 ft. Shale; greeziish-gray, contai'nlng fragments and molds

of thin-shelled bivalves, fragments of fish bones and comatu-

. lids; common species of Forarriinifera are: A mmobaculites ad-

venus, Amntobaculites agrestis, Ammoba'culoides plummerae,

A mmobaculites junceus, Trochdmmina wickendeni, Globigerina
sp., Planulina ea.glefwdensis var.; a few specimens of Giimbe-

. ' li?ia sp; ::

:-;

"'



.Bottom 2 ft. Shale, gray, containing ma'ny irregularly silty to

finely sandy, micaceous, 'slightly. glau"conitic streaks, and small''

scattered fragments of'lignlte~~ The fauna is like that in the top

part of this core.- '

,, 3669-3679; Core 4f.. Recovery 9.! ft~

,

Like core 40 at 3659-366~ :fti

3679-3689
.. ~-

Core 42. Recovery 9 ft.

.

_

,., Top. Shale; greenisll~gray, containing . many thin irregular

streaks and lenses that are silty, mi~aceous, pyritic, and slightly

' glauconitic.

Middle. Shale, gray, thinly flaky, micaceous, containing many _J>ma.JI particies of carbona~eous material.

62

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

3689-3699 .

Bottom. Like the middle part of this core:-

Core 43. Recovery 10 ft.

.. ,

Top. Shale, greenish-gray, containing fragments of casts and molds of small thin-shelled bivalves, and a few thin, silty; micaceous and somewhat carbonaceous streaks and lenses.

Bottom. Like the top part of this core, but niore silty, micaceous, and carbonaceous.

3699-3709 '~ .

Core 44. Recovery 10 ft.
at 'Top 2 ft. Like the bottom part of core 43 3689-3699 ft.; con-
a tains few fish bones and fish teeth, a f~w specimens of Ostra-
codes, and many specimens of Fo1aminifera . The common spe-
cies of Foraminifera are: Ammobaculites comprima.tus and Globigerina sp.

2nd 2 ft. Like the top 2 ft. of this core.

3d 3 ft. Shale like the preceding parts .of this core, and many

<

' ~

thin, highly sandy (very fine-grained sand) micaceous lenses.

Bottom 3 ft. Shale like the precedi]\g parts of this core, contain-

ing specimens of Ammoba.ciilites comprimciti'c.S and a few speci-

mens of Ammotium brat,nsteini.

3709-3719

Core 45. Recovery 10 ft. Top 3 ft. Shale, gray, thinly bedded, somewhat carJ>onaceous, sandy (fine-grained sand), micaceou.s. Contains many shell fragments, and specimens of Foraminifera and Ostracoda. Dominant species of Foraminifera are: A mmoba.culites advenus, Ammoba.culites ag1estis, Ammoba.culoides. plumme?a.e, Reophax sp., . Placopsilina sp., Pseudoclavulina. sp., . Polyphragma. sp., Citharina kochii, Anomalina 'plummeme, Frondicula.ria. cf. F. inversa, Globige1-ina sp.; .Dentalina sp., Quinqueloculina lirel. langula, Triloimlina sp. Common species of ostracodes are: Cythereis burlesonimsis, Cythere concentrica, Cythe?eloides obliquiruga.ta., Cytherella sp., Cyth e1ide<i graysonensis.

Middle 4 ft. No change. Bottom 3 .ft. No ~hange.

This core is the type locality of the :fauna usually called the

~."! ~ 't,_: r . . . -.; ~- ~ s} "Barlow fauna" .2

3719c3729 . Core 46. Recovery 10 ft.

.;,. :

. Top 2 ft. Thinly interbedded gl'ay, micaceous shale and gray,

highly micaceous, somewhat carbonaceous siltstone.

2nd 2ft. Shale, gray sandy (moderately coarse sand), micaceous,

and argillaceous limestone containing a .small quantity of mod-

erately coarse, scattered sand grains.

. . ., 3d 3 ft. Shale, gray, containing lenses of silty, micaceous shale

1 ;;-.: :

and Je:rises of siltstone, fragments of thin-sh"elled fossil bivalves,

t-, :

and specimens of Trochammina 1ain:Wateri, Ammobaculites ail-

>Applin, E. R., 1956, U.S. Geological Sur vey, Professional Paper 264-I, p. 1S7-197, pis. 48, 49.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

63

Depth (feet)

Description

(.. ..

venus, Globigerina sp:, and Cytheridea graysonensis. Bottom 3 ft. Shale, gray, containing small particles of carbonaceous material, and thin lenses of light-gray, very fine grained, micaceous, pyritic, slightly gla~conitic sandstone.

3729-3739

Core 47. Recovery 9 ft. Top 2 ft. Shale, gray, flaky, micaceous:
2nd 2 ft. Shale, gray, flaky, containing thin, .sHty, micaceous, slightly.glauconitic lenses. 3d 2 ft. Sandstone, gray, argillaceous, m.icaceous, gl.auc,o~itic1 somewhat phosphatic. Sand grains are poorly sorted, fine to very coarse (pebble-size).

3739-37.49

Bottom 3 ft. Like the preceding part of thi_s core.

. .- ~ .r. , : '

Core 48. Recovery 10 ft.

Top 3ft. Sandstone, light greenish-gray, argillaceous, micaceous,

glauconitic sandstone, like the lower pa1t of core 47 at 3729-3739

ft., and a few thin lenses of highly micaceous, flaky shale.

2nd 3 ft. Sandstone like the preceding part of this core; also a little soft, argillaceous, glauconitic, slightly micaceous sandstone. 3d 3 ft. Sandstone, light greenish-gray, soft, fine to moderately fine-grained, argillaceous, glauconitic,. slightly micaceous.

~.

Bottom I ft. Shale, gray, thinly flaky, micaceous, containing

thin irregular, sandy (very fine-grained sand), glauconitic, mi-

caceous streaks and lenses.

' ,.'

Core 49. Recovery 8 ft. .., Top. Like the bottom part of core 48 at 3739-3749 ft.

Middle. Siltstone; irregularly and thinly laminated, soft, micaceous, argillaceous, and gray, flaky, somewhat glauconitic shale. . Bottom. Shale, gray, silty, micaceous, glauconitic, and fine to coarse-g1ained, glauconitic, phosphatic, argillaceous sandstone.

3759-3769

Core 50. Recovery 9 ft. Top. Shale, gray, thinly flaky, containing a .few rather evenly distributed, small fragments of lignite, and thin lenses of soft, ' very fine grained, glauconitic sand. ., Middle. Shale, greenish-gray, highly sandy (fine to coar~;~e grained sand), micaceous. Coarse to moderately coarse, we1I-rounded sand grains, are cominon.
Bottom. Like ~he middle part of this core.

3769-3779

Core 51. Recovery 4 ft.
Top. Sandstone, light-gray, soft, fine to coarse-grained, argillaceous, glauconitic, so~ewhat micaceous; moderately fine grains are common.

Bottom. Sandstone, light greenish-gray, soft, mostly fine-grained, argillaceous, micaceous, glauconitic.

3779-3788

Core 52. Recovery 3 ft. Top. Like the bottom part of core .51 at 3769-3779 ft. The sand-

64

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

-~.

~! I '

stone is mainly fine-grained, but coarse grains are fairly common.
Bottom. Shaie, light bluish-green and reddish-brown mottled, . highly micaceous, unctuous. .

(:ornanche Series; undifferentiated

.3'788~3793~ '

The top of the Comanche Series is placed at 3789 ft. on the basis of electric log correlation in connection with the data from samples.
Core 53. Recovery 4 ft. '1: Shale, mottled light-green, yellowish-brown, light purplish-gray,
micaceous, unctuous.

3793-3803

Core 54. Recovery 9 ft. Shale, mottled, dull brownish-red, green, mustard, bluish-gray, and lavender, somewhat.micaceous, unctuous.

3803-3812 '

Core 55. Recovery 9 ft. .. Top 3 ft. Clay, mottled, light-yellowish-green and purple, highly sandy, unctuous. The sand grains are fine to very coarse, rounded to subrounded, and etched; many grains show an orange tint.

Middle 3 ft. Clay, mottled, light-g.reen, -purple, and yellow,

unctuous, slightly sandy. Nodules <if limonite are fairly common.

,.

Bottom 3 .ft, Clay, mottled, light bluish-green and reddish to

.: ~ yellowish-brown, unctuous. ,

3812-3819
..

Core 56. Recovery 7 ft. .
Top. Clay, gray, purplish-gray, and.yellow,.sandy, unctuous. The sand is fin~-grained; evenly distributed. in. the clay, and constitutes about 10 percent of the sample. .. 2nd part. Clay, dark grayi~h-p~rple, waxy, containing bands of .red, yellow, and white-streaked sand. The sand is composed of
fine to very coarse, rounded quartz grains, and a little feldspar.
3d part. Sandstone, white, bentonitic, fine to moderately coarse
grained, micaceous; the fine-grained sand predominates.

. ,. Bottom. Sandstone, mottled, light-green; grayish-purple, and mustard, bentonitic, fine to moderately coa'rse grained, micaceous; the sand grains are etched.

Core 57. Recovery 7 ft.

Top. Sandstone, mottled, gray, light purplish-gray, and yellow,

bentonitic, micaceous. The sand grains are fine to very coarse,

etched quartz, and a little feldspar; many grains are tinted

yellow and pink.

, ~ - "'

Bottom. Sandstone, very light green, fine to very coarse grained,

." 1 J. bentonitic.; the sand grains are etched, and a few are tinted

yellow and pink.

' ''

3829-3831 t

Core 58. Recovery 1 ft. Top. Sandstone, mottled, . light-green, light purplish-red, and mustard, argillaceous and a little sandy clay in which the sand grains are poorly sorted, fine .td ~oarse, ~ounded, etched, and

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

65

Depth (feet)
3831-3835

D~ription

irregularly distributed; many grains are tinted pink and yellow. Bottom. Clay, mottled and streaked, white, yellowish-brown, and mustard, waxy, sandy. Thesand grains .are poorly sorted, unevenly distributed and etched~, One large fragment of . quartzite (pebble?) is present.

Core 59. Recovery 4 ft. j

Top. Quartzite pebble ( ?) or boulder ( ?) , mottled tan, brown,

and pale red.

'

'

. t

Middle, Clay, mottled red and mustard; highly sandy.

Bottom. Sandstone, hard, ferruginous.

Ordovician(_?) 3

Lower Ordovician(?) Series

3835-3835'4" Core 60. No recovery.

. 3835'4"-3835., Core 61. Recovery 2 in.

\v,hite quartzite.

'

3839

Fragments of .white, hard, fine-grained sandstone and caVings.

3840

Fragments of ~hit~ - and-pink, hard, moderately dense: fip~~grained

sandstone and cavings.

3841

Fragments of white, dense, fine-grained sandstone; a few.. fra,gments seem to be quartzitic. Many cavings.

3846%-3846~ Core 62. No recovery. 3846~-3847 Core 63. No recovery.

3847

Fragments of white and pink, dense to moderately dense finegrained sandstone and quartzite ( ?) . t

\
\

-

.~

. '. ~ .

:,
CLINCH COUNTY

Operator: .Luke Grace Drilling Co. Landowner: Lem Griffis well 1

. GGS. No. 338 \ ~ .

Ele' vation: 176 ~t.\ (dez:rick

floor)

I -

~cation: Land District 13, Land Lot Total depth : 4588 ft.

36 ; center o_f Land Lot 36

Completed' Jan.\1,953

~-~

~~ 6,- ~nd 1Bridge, Josiah, and Berdan, J. M., 1961, U .S. Geological Survey open-file report, p.

map. According to Applin , P . L.; .1951. U.S. Geological Survey Circular 91, p. 28 the oldest

formation penetrated ih the Barlow well is classified as teLower Cretaceous ( ? ) /'

~

\ ,__

.1.4 . ,.,.,..--.- ~

66

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Summary of Stratigraphy

Depth (feet)

Thickness (feet)

. ~'

Tert~y

Not studied

Cretaceous

Gulf- 1

Lawson Limestone upper member ( ?) ----------- ----- 2790



(1st sample)

Beds of Taylor age___________ __ ___ _ _ _ ___._ ___ 2900?

Beds of Austin Age (no samples 3100-3620 ft.) ______ ?

Atkinson Formation upper member -------- ---------- 3620? lqwer member(?) ________ 3800?

110?
? ? 180? 43?

Pre-Cretaceous

Igneous rocks------------------------~--------_ 3843 to 745 total depth
Lith_ologic ~nd paleontologic description of cutting samples.

.. ' \'' " ; D epth
(feet)

Description

0-2790

Samples not studied.

,. :;

, . ' . .

Cretaceous .,.

+'.

Gu1f Se'ries

2790-2800

Lawson Limestone. Upper Member(?). / Dolomite, light-tan, moderately coarsely crystalline, somewhat
porous; contains a few blebs of gypsum. The lithology suggests
/ that the sample is from the upper member of the Lawson Lime-
/ stone.

2800-2810

Like the sample at 2790-2800 ft. The dolomite contains . a few

. ; 281o~~9oI o~

1\

blebs of gypsum. No samples.

,. .. .,(.( ,

.:

Beds of Taylor age.

2900-291() . .!
/ ' '
}
I

Limestone, white, hard, chalky, containing irregularly distributed gray areas. Much finely fragmented calcitic mate1ial is embedded in the limestone, and is probably derived from broken molds and fragm ents of molds of small specimens of Foraminifera, and from fragments and prisms of l nocerwmus. The foraminiferal f auna, which suggests the upp~rmost part of the beds of Taylor age, is composed of specimens of Anomalina cosdcni, Stensioina americana, Globorotalites conicus, Bolivinoides deco-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

67

Depth (feet)
2910-2950 2950-2960 2960-3000 3000-3010 3010-3020 3020-3030 3030-3040
3040-3050 3050-3060
3060-3070
3070-3080 3080-3090
3090-3100
3100-3620

Description

rata, Robulus sp., Globotruncana marginata, Bolivina incrassata, Bulirninella carseyae, Anonialina sholtzensis, Planulina cedark eyscnsis. The sample gives no indication that the lower member of the Lawson Limestone was penetrated in .this well.

Samples not studied.

Chalk, white, soft. Washed residue is small, but contains a fauna similar to the sample at 2900-2910 ft.

Samples not studied.

Chalk, white, soft. Washed residue is small and is composed of a few nodules of hard chalk, a few small rounded nodules of pyrite, and fragments of In()Ce'ramus and other fossil bivalves.

Like sample at 3000-3010 ft.; also fragments of echinoid spines and a few specimens of Anomalina sp.

Chalk, white. Washed residue is small and composed of a few

fragments of hard chalk, a few fragments of Inocera.mus, and

echinoid spines.



Chalk, white. Washed residue is moderately large, and is.composed of large fragments of indurated chalk in which are embedded fragments of Ino-ceramus, echinoid spines, specimens and calcite casts of specimens of Foraminifera: and small crystals of pyrite. No narrowly re~tricted species of Foraminifera were indentified.

' Like the sample at 3030-3040 ft., but the chalk contains few embedded microfossils and fragments ..

Chalk, white, soft, and a moderately large residue of cuttings of dolomite, fragments of Inoceramus and other fossil bivalves, and specimens of nondiagnosticspecies of Foraminifera. The sample may be largely cavings.

Chalk, white, soft. Washed re!;lidue is moderately large and composed of fragments of hard chalk, in which are embedded the finely fragmented debris of small fossils; many fragments of Inoceramus and other fossil bivalves; a few n-odules of pyrite.

Chalk, white, soft. Washed residue is small and like the sample at 3060-3070 ft. .

Chalk, soft, white. Washed residue is small and composed mainly of fragments of light-tan dolomite (probably caving), a few fragments of hard chalk, Inoceramus fragments, and sparse specimens of Foraminifera.

Dolomite, chalk-coated. Washed residue is large and composed of light-tan and light-brown, moderately finely crystalline, irregularly porous dolomite; nodules of hard chalk, and of pyrite; Inoceramus prisms; a few specimens of Foraminifera. The dolomite is probably caving. The sample contains nothing to suggest that the drill has penetrated a stratigraphic unit older than the beds of Taylor age.

No samples.

68
Depth (feet)
3620-3800

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
DeScription
Atkinson Formation. Upper Member?. (electric log correlation)
No samples.

Atkinson Formation. Lower Member(?).

3800-3807

3810

3821

1..

3820-3830 3830-3840
3840-3850

Sand, poorly sorted, fine to moderately coarse-grained, clear quartz. The sample contains small, colorless dolomite rhombs, irregularshaped nodules of bright-green glauconite, a few phosphatic nodules, nodules of crystalline pyrite, and a few fragments of thin white shells of brackish-water ( ?) bivalves. The sand is almost exactly like-the sand penetrated in the lower member of the Atkinson Formatil;m in .other nearby wells. A few cavings of the typical speckled shale of the lower part, of the beds of
. Austin age is believed to indicate that the miit was penetrated in the part of the geologic section from which no samples were received.
Simdstone like the sample at 3800-3807. in its. general ch~racter,
but more highly glauconitic; the sand g~ains are fairly well sorted and mostly of medium sized. ...

Sand, coarse-grained, clear quartz; _the.average grain-size is about

1 to i.5. mm. The sample contains a little glauconite, a few shell

fragments, phosphatic ~odules,_ a.nd nodules of light gray-ish-.

brown, dense very finely crystalline, slightly' glauconitic dolo-

mite.

"

Like the sample at 3821, _and some 'pebble-size grains of sand.

Sand like the samples belo-.,v 3800 ft.; also many. dark-gray, worn,

sand-encrusted fragments of. Ostrea sp. and a little glauconitic

, imd phosphatic material. '



Conglomerate ( ?) composed, chiefly, of hard, angular fragments of

., . light bluish-green, light brownish __-red, and mustard-colored

weathered (?) igneous rock; also many fragments of dark -brown-

ish-red, and mottled red, green and- mustard-colored clay shale

that may be the matrix containing pebbles and fragments of

igneous rock.

-~

Pre-Cretaceous
3843-4588 T.D. Igneous rocks. The top of the igneous rock at 3843 ft. is based on the correlation of the electric log of the well.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

69

CLINCH COUNTY

Operator: H. L. Hunt Landowner: Alice Musgrove well 1
Location: Land District 12, Land Lot 198; Northwest corner of southwest quarter of Land Lot 198-

GGS. No. 481 Elevation: 147 ft. (derrick floor)
Total depth: 4088 ft. Completed: Jan. 18, 1944.
,,..._ ~

Summary of Stratigraphy

.. . ~ J ;

Tertiary

..

Depth (feet)

Thickness (feet)

Oligocene

.

upper, Suwanee Limestone-------~----------------390

80

Eocene ~

' upper, :Ocala Limestone, upper member___"___________ 470

150

.,,.

lower member___________________ 620

110

middle, upper middle, Avon Park Limestone__ _____ 730

210

lower middle, Lake City Limestone~_:__ ____ _ :__ ! 940

520

]ower, Oldsnrar .Limestone_____. ----~-~-------------- 1460

?

Paleocene . ''

,~

in beds containing Tamesi fauna at 2370 ft. ________ ?

?

.;

Cretaceous

Gulf .

. '

Law~on Limestone, upper member ( ?) __________________ 2820

40

Beds of -Taylor age___________:_~_______ _ ____.:_::_____ 2860

220

Beds of- Austin age______ _____. --~---- _.._ ___ _ 3080

310

At}dnson Formation,. upper member_________. _______ 3390

225

lower member_________:____________ 3615

210

Comanche .iindifferentiated ------------- ------------------- 3825

128

Ordovician

Lower Ordovician1 qitartzitic sandstone and

dark shale -----~----------~-~------------------------------------- 3953 to 135

' '

total depth

Lithologic and paleontologic description of cut-

tings and cores. Samples are cuttings unless

otherwise stated.

1

Depth (feet)
0 to 2370

Description
Samples were. studied microscopically but were not described. The ' different stratigraphie units of Oligocene and. Eocene age were

' 'Bridge, J osiah , and Berdan, J . M., 19~l .U. s .,Geological Sur;,ey open-file re~ort, p. 5 and map.

70
Depth (feet)

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
.Description
determined on the basis of characteristic species of Foraminifera . that were identified in the samples, and the approximate depth . to the.top of each unit is shown in the summary of stratigraphy.

In Paleocene Series

Beds containing Tamesi fauna

2370-2400

Limestone, gray, hard; marly, slightly glauconitic; a few fragments of the limestone are sandy. The sample contains a little light grayish-tan chert.

2400-2410

Chalk, cream, slightly glauconitic. The sample contains abundant

specimens of very small, poorly preserved, non-diagnostic Fora-

minifera; Asterig erina sp. common.



2410-2420

Sample not described.

2420-2450

Limestone, light-gray and light-cream, hard, chalky. The sample contains a little chert, and specimens of small Foraminifera like
the sample at 2400-2410 ft.

2450-2460

Sample not described.

2460-2470

Limestone, gray and cream; chalky,nodular, slightly glauconitic;

many specimens of small Foraminifera like sample at 2400-2410

ft.

~

2470-2480

Sample not described.

2480-2490

Limestone, cream, nodular, somewhat glauconitic. The sample con- tains a little chert. The limestone bas a sandy appearance because it contains a large amount of very finely fragmental calcitic material. The microfauna is composed of specimens of small Foraminifera like the sample at 2400-2410 ft.

2490-2550

No change.

2550-2560

Limestone, like sample at 2480-2490 ft., but more calcitic. White chert in the sample has a spicular appearance; ;the microfauna is unchanged.

2560-2680

No change.

2680-2690

Like sample at 2550-2560 ft., but the limestone is softer, contains fine-grained sand and large worn fragments of calcite; the microfauna is unchanged.

2690-2770

No change.

2770-2780

Sandstone, greenish-gray, very fine grained, glauconitic, contain-
ing much calcitic material. The sample .contains gray, sandy, marly clay; specimens of N.odosa1ia affinis a~id a few other foraminiferal species.

2780-2800 2800-2810

Samples not described. Chalk, white, sandy; and gray, very fine grained, somewhat gl~u
conitic sandstone. The sample contains a little gray chert and non-diagnostic specimens of small Foraminifera.

2810-2820

Limestone, light-cream, chalky, glauconitic; light grayish-tan chert

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

71

Depth (feet)

Description
common. The sample contains specimens of small Foraminifera, specimens of Globorotalia velascoensis, and other species characteristic of the beds of Paleocene age that contain a Tamesi fauna.

Cr e t a c e o u s

Gulf Series

Lawson Limestone. Upper Member ( ?)

2820-2830
2830-2840 2840-2850
n: 2850-2860
. '

Limestone, white, like sample at 2810-2820 ft., a little glauconite, and a little light-gray spicular chert; many fragments of lightbrown dolomite that possibly marks the top of the upper member

of the Lawson Limestone (Navarro age) .

Dolomite, light-cream, finely granular, is the dominant material in this sample.

Limestone, white, containing scattered small grains of dark-green glauconite. The limestone is more chalky than that in the overlying beds of Paleocene age. Indigenous specimens of Foramini fera are not abundant but specimens of Globot?-uncana area are

present.

Like sample at 2840-2860 ft., but the limestone is only slightly

glauconitic.



Beds of Taylor. age

2860-2870

Like sample at 2850-2860 ft.; highest appearance of Inoc eramus
fragments, and a few specimens of Globorotalites conicus and Stensi~ina americana.

2870-2880

Sample riot studied.

2880-2890

In oceramus fragments are abundant.

2890-2970

Samples not studied.

2970-2980 Clay, gray and greenish-gray; soft, marly, begins to show in the

:.~:.
~T

samples and increases in amount in the samples below this depth.

A little sand is present but may be caVing.

2880-2990
2990-3060 3060~3070

Like the sample at 2970-2980 ft.; fine to moderately fine-grained
sand is about 2p percent of the sample.

Samples not studied. '" ..

Marl, ,gray.

~

3o7o-36so

Sample not studied.

l~ "
3080-3090 .

Beds of Austin age
The top of tQe beds of Austin age is placed at 3080 ft. on the basis of electric log correlation supported .by the data from samples.
Limestone, cream, and a few _fragm ents of light-gray marl. The .material being drilled seems to be gray and greenish-gray marl containing streaks of limestone. Inoc eramus fragments are

72

GEORGIA. GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description



abundant; fine to 'coarse-grained sand is ' about 50 percent of

the sample.

309"0-3100 ,.,..,;! Marl; about 75 percent of the sample; fragments of glauconitic limestone are about 25 percent of the sample. Inoceramus fragments are common, and a few shell fragments are present in

I
~ '

3110-3120

sandy fragments of the marl. Marl. Highest occurr~nce of specimens of Citharina texana indi-

I ..

cates the Austin age of the beds.

3120-3240 .3240-3250

. Samples not studied. j" _
. Marl~ dark-gray, slightly speckled; highest occurrence of this

type of lithology.

3250-3300

Samples not studied.

33003310

Shale, greenish, and brownish-gray thinly flaky shale. Specimens of Globotruncana sp.,- Globigerina . sp:, . and Gumbelina sp. . are

"': ..
3310-3380

. common; specimens of Planulina .austiniana indicate the Austin

age of the beds.



Samples not studied.

, ;.;, .

3380-3390

Shale, dark, flaky, speckled, .and fragments of .dark-brown, thinly

flaky, speckled, greasy-looking shale.

..

.

. .

Atkinson Formation. Upper M~~ber. .

3390-3400

Shale, like sample at 3380-3390 ft., and fragments of white, soft,

fine-grained, glauconitic sandstone; most of the sand grains are

,:

angular.,,

{~ ;:

3400-3410

Sample not studied.

3410-3420

Sand and sandstone like sample at 3390-3400 ft., and several types of gray and greenish-gray thinly flaky _clay,shale; a little green,

3420-3477

smooth-textured, noncalcareous shale; a few fr.;.gt}tents of fish

bones.

.. ~.

;_, .;

Samples not studied.

3477 ' l . - Sidewall core.
.. ,_. . '" ~ Sand_, white, fine-g;rain~d, anguiar.

3477-3620 ' . Samples not studied.

3615

Atkinson Forma.tion. Lower 1\'Iember.

Top of lower member of Atkinson For~<ation . i.s plac~d on the .

.basis of electric log correlation in conri e~tion' .with the data from

sa.mples.

. .

~ . .

3620-3630 3630-3640 3640-3S5o'.

Shale, green and gray, several types; sand; shell fragments.
Sample not studied.
Shale; g~een; flaky; m'a~y specimens of <;alcareous species of Fora-
. ' niin1fera that are characteristi'c of the upper member of the - AtkinSon Formation; some or air of which are probably 'caving;.
several specimens of arenaceous species of ' Foraminifera that are indigenous to the ,lower Atkinson.:

LOGS .OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

73

Depth (feet)
3650-3680 3680-3700 3700-3710
3710-3720
3720-3736 3736
3736-3840

Description
Samples not studied. Like sample at 3640-3650 ft. Shale, like sample at 3640-3650 ft. ; fragments of light-gray, hard,
dense, fine-grained, micaceous, glauconitic sandstone begin to show in the samples. Shale, like sample at 3700-3710 ft., and many fragments of white, . loosely consolidated, fine-grained sandstone containing a few shell fragments and fish teeth. Samples not studied. Sidewall core. Sandstone, white, loosely consolidated, fine-grai:iu:!d,- glauconitic. Samples not studied.

3825
3840-3850
3850-3870 3870-38802

Comanche Series undifferentiated

Top of Comanche Series is placed on basis of electric log correlation in connection with the data from samples. '

Sand, unconsolidated, containing greenish-yellow and pink grains, coarse-grained, and a little feldspar.

Samples not studied.

1

Sand like sample at 3840-3850 ft., and y~Ilow, green, and J!1.Ulti-

colored, hard, very finely ~icaceous shale. . .

.

CLINCH COUNTY

.~: . :1:tr_

-~ r; .

Operator: .,Wiley P...Ballard, Jr. . .
Landowner:' 'l'imber Products Co.'

, GGS. No. 496 ~. Elevation: 214 ft. (derrick

WelfiA .

' ' .floor)

.,. :

. .; . .I

--r .. .

Location: Land District -7, Land Lot . . To'tal depth: 4232 ft .

. 306 ;,2050 ft. east and 1760 .ft. south .1. Complet~d: Feb. 8, 1956

.,,of :n,orthwest corner of Land Lot . . ,J

' 306. - .

.

. o..:-;:

Summary of Stratigraph~

.) ., ~ -

~ ...

I .

Depth (feet)

Thieknees (feet)

. '=."

0 ..

'!ertiary

Eocene ~--"--~~-----------"----~--------------------------c---------------"---- -

1528

upper, Ocala Limestone, upper member_ ______________ 492

188

..

(1st sample)

lower member- ----.,...---'--.- . 680 260

miqdle, .undifferentiated -----------------------.---------------------- 940? 740

lower, beds of Wilcox age______:____.:__:_______________ 1680

340

'Samples below 8880 ft: not studied: .

74- :~

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Paleocene

Depth
(feet)

Beds of Midway age----------------------------------e------------------- 2020

/
Thicknesa (feet)
540

Cretaceous

Gulf

Beds of Navarro age______________________________________________________ 2560

320

Beds of Taylor age_________________________________________________"______ 2880

140

Beds of A ustin age________________________________________________________ 3020

340

Atkinson Formation, upper member____________________________ 3360

430

lower member---------------------------- 3790

220

Comanche undifferentiated ---------------------------------------------- 4010

145

Pre-Cretaceous
Igneous rocks-------------------------------------------------------~--------- 4155 to 77 total depth
Lithologic and paleontologic description of cutting samples.

Depth (feet)
0- 492
492- 522
522- 610 610- 620 620- 660 660- 680

Descripthm

No samples.

Tertiary
Eocene Series.

Upper Eocene. Ocala Limestone. Upper Member.

Coquina, chalky, nodular; comp;;ed of wo~n and broken chalky

specimens of Foraminifera. Dominant species are Operculina

ocalanus and several varieties of Lepidocydina ocalana. Other

determinable fossils are Asterocyclina cf. A. asterisca, Sphaero-

gypsina globula, Hete1ostegina ocalana, and a few specimens of

smaller Foraminifera.. Fragments of bryozoans and fossil bi-

valves are also present.

........

Coquina, like preceding sample but more chalky and more firmly consolidated. Samples contain worn fragments of large specimens of Lepidocyclina and Operculina, and some rounded quartz ._ grains. Samples at 572-582 feet and 600-610 feet contain specimens of Pseudophmgmina flintensis.

Coquina, like preceding samples, but "mud conditioner" composes about one-half of washed concentrate.

Coquina, composed mainly of worn and broken fragments of Lepidocyclina, Operculina, Camerina? and a few other .genera of larger Foraminifera; also hard chalky nodules composed of comminuted fossil debris.

Dolomite ( ?) , light-brown, slightly chalky, highly calcitic, mod-

erately porous; seems to be an altered coquina.

:

_;

;_

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

75

Depth (feet)

Description
Upper Eocene. Ocala Limestone. Lower Member.

~80- 700

Coquina, 50 percent of sample, composed of hard, chalky, worn, and finely comminuted -fossil debris; 25 percent, grayish-brown, finely granular, calcitic dolomite.

700- 720
720- 730

Coquina, composed of worn and broken, moderately finely comminuted fossil debris; ~orne small nodular fragments of finely granular grayish-brown dolomite. The chalky and dolomitic materials contain traces of pyrite ( ?) . Samples contain poorly preserved specimens of Amphistegina pinar'ensis cosdeni, Fabiania cubensis , Rotalia cushmani, Gyroidina cf. G. nassauensis, calcareous algae and a few echinoid -fragments. -
Coquina, composedo:f chalky, worn, rolled, and broken molds of fossils. The chalky material shows traces of glauconite(?) and pyrite. Fauna is similar to that in the preceding sample with the addition of a few small specimens of Lepidocyclina sp.

730- 740 -

Coquina, moderately hard, chalky, finely comminuted, containing a trace of glauconite. Fossil material abundant, but badly worn and mostly undeterminable. Amphistegina pinarensis is the dominant foraminifer; miliolids and a few other species of small Foraminifera are present. Sample contains a little dolomite.

740- 760

No samples.

760- 770 .; .

Coquina, worn and finely _broken as in preceding sample. Sample contains many fragments of finely granular light-tan dolomite, but little determinable fossil material;

770- .810

No samples.

810- 820

Like sample at 760-770.

820-- 840

Coquina, dolomitic, chalky, containing glauconitic areas; dolomite composes about 50 percent of the cqquina and is unevenly dis-
- tributed. Fossils composing coquina are mainly several varieties . of L epidocyclina ocalana. Echinoid fragments are also present.

840- 890

;~ Chalk, white, dolomitic, calcitic, somewhat glauconitic; contains specimens of L epidocyclina, and traces of an originally high, but now much altered fossil content. Sample at 880-890 contains much caved material.

- 890- 940

Dolomite, light-cream, porous, slightly chalky, calcitic; probably recrystallized coquina.

940- 970
970- 980 980-1000

.Middle Eocene. Undifferentiated.
Dolomite, light-tan, finely granular, porous, chalky, calcitic, con-
. taining worn chalky .molds Of Foraminifera, Amphistegina 'sp., Operculinoides, and others.
Chalk, light-cream, moderately. hard, dolomitic, containing specimens of Amphistegina sp. and Lepidocyclina sp.
Limestone, white, hard, nodular, porous, chalky, slightly dolomitic. Limestone is composed chiefly of well-sorted, worn, finely broken

/

76

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Dept h ( feet)

Description

molds of small Foraminifera and other fossil debris. Seemingly indigenous specimens are Amphistegina cf. A. naasauensis and . Operculinoides(?) sp. Sample at 990-lOOO ft. contains a small amount of fine-grained, subangula_t, quartz S!ind.

1000-1040 1040-1050

No sample~.
Similar to material described at ~80-1000, but less well consol-
idated; contains a few fragm ents of dark grayish-brown, finely granular dolomite, .similar to tha~ described at 700-720 ft. -

1050-1090

Lin:testone, light-cream, moderately hard,' chalky, calcitic, dolomitic,

coquinoid. Limestone composed of fine to coarse, worn frag.ments of molds of Op ~rculinoides, L epidocyclind, Operculi?ia,

Camerina, bryozoan fragments and undeterminable microfossil

and macrofossil debris. . .

-~

.

1090-1160
.. . 1160-1190

Lithologically similar to the preceding sample, but contains many specimens of L epidocycli'nf!- (Pliolepidi;,a) r . douvillei Lisson,

an? L. cedarkeysensis; also b,ryozoan :::.ild echinoid fragyp.ents.

Limestone, coquinoid, chalky, calcitic, composed. of coarse .to fine,

worn fossil debris, not usually determinablE;, .but includes L epi-

doC1JClina sp., Amphistegina sp., bryozoan, .echinoid and bivalve

fra~ents. A trace of glauconite present on some of the fossil

fragments:

.



1190-1220 1220-1240

No samples. . .



. .

,: I

/ fo ... ~. ~1 ~ ,

; {, .'

Sand, fine to.medium-grained, subangular, clear quartz; fragments

.. of grayish~white, very..finely granul~r, slightly porous dolomite; ~

and fragroents of white, moderately. hard, irregularly sandy,

glauconitic coquina composed of worn and broken molds of

microfossils and macrofossils. Note. The two samples, 1220-1280

and 1230-1240, seem to' be out -of place and were possibly fuis-

numbered.

1240-1280
. . -~ . .:
..

Coquina, white, moderately hard, calcitic, chalky, composed of .worn . fragments of microfossils .and .macrofossils and a small amount of irregularly distributed glauconite. The fossil material -is usually undeterminable, but fragments of .Lepidocyclina sp., bryozoans a~d echinoids were recognized.

1280-1310 Coquina, composed of worn and usually broken cream limestone .

m_olds of fossils, among which are specimens. of Amphi?t.egina

naasauensis, Epistomaria semintarginata, .Discorbis in ornatus,

Eponides gunteri, LeJYidocyclina (Pr>lylepidina) antillea, and

many spe.cimens of smaller Foraminifera and ostracode!>.

1310-1325 No samples.

i325-1370

Limestone, light-cream, porous, chalky, probably a water-worn,

altered ' coquina shoWing only traces of fossil. molds. About 50

percent of sample is grayish-brown moderately finely crystalline

dolomite, and a little light-gray chert. A trace of selenite is

present in some of the chips of' dolomite. Fragments. of Astero-

cyclina asterisca (an upper Eocene form) in sample at 1350-1360

ft. is probably caving.



LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

77

Depth (feet)

Description

1370-1'410 ..>

Limestone, white moderately hard, chalky, shoWing traces of fossil
structure and ornamentation. Some limestone fragments are glauconi~ic. Washed concentrate contains .worn fragments of larger: Foraminifera, and a few."fragments: of dolomite and chert.

1410-1440 -. .

. Limestone, white>to light-creani, moderately hard, porous, chalky, containing . abundant fragments of specimens of Pseudophragmina (P1oporocyclina) teres, Lepidocyclina (Polylepidina) antillea, Amph;istegina lopeztrig.oi, an~ many bryozoan fragments ..

1440-1460

Limestone, cr~am,..moderately h!ird, porous, coquinoid, somewhat

glauconiticand dolomitic, containing abundant broken and worn

. specime~s of a number of species and genera of Bryozoa.

1460-1500 :,) Limestone, cream, chalky, glauconitic, dolomitic, containing many

. ., bryozoan fragments, fragments of fossil bivalves .and other.fossi1

. i , debris. The glauconite is dark green, .and .occurs as smal(irreguiar i~clusions in depressions in the lim~stone and as partial

filling for some of the fossils.



1500-1520. Limestone, ~hite coquinoid, chalky, doi~miti_c, glau~onitic, con~~iri

' il{g abundant sp~'Cimens of Operculinoides gra;,;elii Cole, bryozoan

frag~~nts,' ;and other undeterminable 'fossil. debris.

l520-1570 J' .No samples. . .

. . : ~

1570-16'40

Coquina, 50. percent of.. sample; composed of worn and fragmental

which limestone molds of small specimens of Foraminifera and

a other fossils; 50 percent. of sample is fine-grained qu~rtzitic
..... sand containing few phoSphate nodules and fragments of dolo-

oi white limestone tnolds of small. speci:mens Foraminifera and

J.

a fragruental fossil material.



1640-1~7Q.

Sand, fine _tp medium~grained, subangular, clear quartz, containing

a few black phosphatic nodules, is about 90 percent of sample.

Fragmental fossil material is abqut 1P perc~nt of sample. In
-"' . '.:I .the sample~ at l650-1670, the sand filtd the .fossil molds each

3 t; (

compose aboilt"!5~ percent of "tp.e-' ~uttings.

.

.

1670~1680

Limestone, 'white, kdder~tely hard, c6quinoid, containing abundant

, specimens of a, stron.gly beaded tumid .Camerina? sp., and of

. Discocyclina (Aster_dcyclina) monticellensis Cole and Ponton.

"~ ~:Other fragmimtal fossil 'm~terial is .pres~nt but unidentifiable.

.... ' ...

I

I~

......

, :..

~

''

., , Lower Eocene. Beds :of. Wilcox age,

1680-1690 Lithestone,i chalky; dolomiti~~ glauconitic, containing a trace of
-~ ,." fragme~tai f~ssil material and light-gray .chert. Note . This material is similar to some iri higher samples and may be out of place. . Top of low~r Eocene is based, in part, on electric log characteristics of the Ballard well.

1690-1700
. '

Limestone, chalky, doiomitic, fossiliferous containing fragments of light-gray chert and. specimens of Asterocyclina monticellensis Cole and Ponton, (probably caving); Discocyclina weaveri (char-
< acteristic of .'the Salt Mountain Limestone), fragments of larg~

78
Depth (feet)
1700-1720 1720-1750 1750-1760 1760-1770 1770-1780 1780-1800 1800-1820 1820-1870
1870-1800
1880-1900 1900-1930
1930~_1980
1980-2020

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

echinoid spines, and other fossil material. Robulus cf. R. midw.ayensis occurred in one fragment of limestone.

Sand, very fine to coarse.

Sand, like preceding sample, and a:b.out 50 percent small fragments of fossil -mateiial composed of white chalky limestone. Small black phosphatic nodules occur at 1740-1750 feet.

No sample.

Sand, very fine to coarse-grained, subangular, clear quartz, and some nodular fragments of white, hard, glauconitic, sandy limestone composed of broken and fragmental molds of fossils.

Sand as in the preceding sample, about 80 percent; about 20 per-

cent white sandy limestone molds of fossil fragments. '

Like the preceding .sample with the addition of many fragments of limestone similar to that in sample at 1760-1770 feet.

No samples.

t

"Sand, fine to veiy coarse,. subangular, clear quartz; abundant gray

and some white fragments of Ostrea-iike bivalves that have

been finely broken and worn; small nodules composed of white . chalky limestone, fossil frag~ents, and glauconite. At 1,850-1860

feet, sample contains fragments of .several" species of Bryozoa

and some fragments of Camerina sp.

L

.

'

Sand, fine to ve1~y : coarse, clear quartz, containing large black

nodules of phosphate, constitutes most of sample. A smaller

part of sample is composed of fragments of a coquinoid lime-

stone, part of whichare gray, sandy and glauconitic, and part

are white, porous, glauconitic and fossiliferous. A few worn

specimens of Pseudophr"agmina (?) sp. are apparently indigeil()m5.

~o samples.

Sand, fine to very coarse, silbangular, clear quartz. Sample con- tains ~ few specimens. of Discocyclina weaveri and small fragment~ of other fossils like tho~e de~cribed from higher levels in

the lower Eocene.



"

Sand, like preceding s~mple; and abundant gray and white, sandy,

somewhat glauconitic fragments of Ostrea, other fossil bivalves,

and unidentified fossil materiaL

Sand, fine to very coarse, subangular, clear, quartz, containing a few phosph~tic nodules, and many fragments of white, glau~
.conitic, sandy, fossiliferous limestone; fragments of gr.ay and whit~, sandy, glauconitic, badly worn, fossil bivalves; pink-
stained, sandy, glauconitic, porous, fossiliferous limestone; and other fossil debris. So~e of the material is probably caving.

Paleocene Series

Beds of Midway Age

2020-2040

Lithology and fauna like the preceding sample, with the addition _

'

OF LOGS OF SELECTED WELLS IN THE COASTAL PLAIN

GEORGIA

79

Depth (feet)
2040-2060 2060-2070 2070-2090 2090-2120 2120-2130 2130-2150 2150-2i80 2180-2200
2200-2250
2250-2260
2260-2300 2300-2330 2330-2380

Description

of many fragments of fine-grained, highly glauconitic dolomite. A few fragments contain selenite inclusions and a few are chalky.
Some fragments of dolomite are sandy.

No samples.

Sand, fine to very coarse, subangular, clear quartz, about 50 percent of sample; about 50 percent white, glauconitic, sandy limestone that contains small fragments of Ostracodes aitd undeterminable fossils;

Limestone, white, moderately hard, sandy, glauconitic, and some-

what fossiliferous like the preceding sample. Sample contains

a little sand, and a few fragments of glauconitic sand cemented

with selenite.





Sand, fine to very coarse grained, about 50 percent of sample; 50 percent white, moderately hard, sandy and glauconitic limestone like the preceding sample. The limestone contains fragments of microfossils and macrofossils.

No sample.

Limestone, light-gray, highly sandy, glauconitic; sand is moderately fine gr'ain~d and contains a trace of mica.
Sa~d, fine to very coarse, and fragments of sandy limestone and wom fossils that are p-robably caving from higher levels.

Sand, fine to coarse-grained, with medium-sized grains common at 2180-2200 feet; many small fragments of light-gray, very finely sandy and glauconiti'c, chalky limestone. A few small poorly-preserved specimens of Foraminifera are possibly indigenous in the _sample. Coarse grains of sand are common at 2190-2200 feet.

Sand, fine to coarse-gtained, about 25 percent of sample; 75 percent gray, hard, finely sandy and glauconitic, calcareous clay, or argillaceous, calcare<ius sandstone. The clay contains scattered flakes of mica and small, poorly-preserved fragments of fos-
- sns. At 2210-2220 feet, a few fragments of Nodosaria aflinis wash from tlie clay.
Sand, fine ~o coarse, about 25 percent of sample; 75 percent gray, glauconitic, finely sandy, calcareous clay. The clay contains specimens. of Nodosaria a/finis, Robulus sp., Cibicides alleni, and Cytheropteron midwayensis.

Like the preceding sample with the addition of abundant fragments of light-brown, hard, highly glauconitic, coquinoid limestone composed mainly of finely com.minuted fossil debris in a dolomitic and chalky matrix.

Limestone, white, hard, chalky, irregularly porous and glauconitic, containing many traces of fragmentary fossil material; a few poorly. preserved free specimens of Anomalina sp., Cibicides(?) sp.; and others.
Limestone, white, hard, very fin~ly porous and glauconitic, show-

80
Depth (feet)
2380-2400
2400-2410. 2410-2430 2430-2480
2480-2510 2510-2530 2530-2540 2540-2560

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

D~cription

ing abundant traces .of an original very finely fragmental fossil content. This material is more firmly consolidated than in the higher samples. A few ;fragments of Nodosaria cf. N. a,ffini8 are in the sample at 2370-2380 ft.

Limestone, light-gray, argillaceous, chalky, very finely. porous,

containing irregularly distributed nodules of glauconite and of

phosphate. Poorly preserved specimens of smaller Foraminifera

are: Robulus midwa,yensi8, Nodosa1-ia affini8, Vaginulina longi-

forma, Cibicides _allen_i, Cibicides howelli, Cibicides vulgaris,

Chilostomelloides eocenica,, and many specimen's of the ostracode

Bairdia suborbiculata.

' -

Like the preceding sample, but containing many fragments of light gray, chalky, very finely sandy, somewhat micaceous lhnestone.

No samples.

Sand, fine to coarse-grained, and cavings of fossiliferous mater~al

and limestone. The sample at 2450-2460 feet contains specimens

os- of Robulus midwayensis, Robulus degolyeri, Nodosaria a/finis,
Adhaerentia midwroyensis, Ammobaculites paleoce"nica, and

tracodes as in sample ~t 2380-2400 f~et;

-

.

Limestone, clayey, very finely sandy, slightly glauconitic and micaceous, and a few large, irregular-shi:rped, dull, phosphatic
nodules. Some cavings from higher levels...

No samples. Like the sampl_e -at 2480-2_510 f':!~t.

No sample.

Cretaceous

..

Gulf Series

Beds of Navarro _,age ,_.

2560-2580 . Sand, fine to very fine, clear quartz, about 75 'percent of sample;

about 25 percent fragments of several' kinds of limestone from

slightly higher depths, and some phosphatic 'nodules. Nodular _

fragments of pyrite fairly common; a ; few phosphatic molds .and fragments of gastropods and cri'p-~orals ; a few specimens

' of Globotruncana area, Gyroidina cf.- G. globos-a, and Planulina'.

: '

spi8sicostata.

2580-2610 ,_,, Sand, fine to coar-se-grained, and small fragments of limestone
probably caving from higher ievels; a few fragments of soft, : gray, micaceous, silty- clay. The fauna is the same as that in the preceding sample, with the addition of I?seudotextularia plu-mmerae.

2610-2620 No sample.

2620-2630

Sand, very fine to coarse, clear quartz; very fine grains dominant. Sample also contains fragments of soft, gray, micaceous, very _silty clay, map.y pyrite nodules, and some specimens -of Fora,

r
['

. I

LOGS OF SELECTED WELLS . IN THE COASTAL PLAIN OF GEORGIA

81

Depth (feet)

Description

minifera characteristic of the .Navarro Group.

2630-2640 2640-2680 .

. No sample.

. Clay, gray, soft, .silt!y, about 50 percent ot.sample; 50 percent fine

to very fine grained ~iear quartz sand; a few pyrite nodules and

a few speCimens of Navarro microfossils.

'' ~ .,.

Clay, gray, soft, siity, micaceous; abo~t 50 percent of sample; 50

: percent fin~ to very fine .' grained sand; a few specimens of

Globotritncana sp.

..!



2710-2750
. 2750-2770
2770-2780 ].

No .sample's. Like sample at 2680-2710 feet. No sample.

2780-2790 . Like sample at 2680-2710 feet.

2790-2810

No samples.

2810-2830 Like sample at 2680-2710 feet.

2830-2840

No sample. .

2,840-2850 .Like sample at .2680-2710 feet . .

2850-2870, ., No. samples

2870-2880
.
2880-2890 2890-2900 2900-2910 2910-2920 ..~. 2920-3020 ...

Beds of 'Taylor age
Sand, fine to cQarse gr~ined, and gray shale, harder tl).~n in pre~ ceding samples; pyrite nodules fairly common; many fragments
of Inoceramus. Fauna includes several species of Globotruncana not seen . at higher levels and specimens of Globigerina, Haplophragrnoides . calcul1ts, Cithari:na wadei, .Bolivina incrassata, Globorotalit.es conicus, Cibicidcs . stephensoni, Planoglobulina glabrata, Kyphopyxa christneri, Loxostorna clavaturn, Grwdryina laevigata, sever~l species of ostracodes, and other fossils:
No sample. Like. sample at 2870-2880 feet, but contains no Inocera?nus fr~g-
ments. No s!}mple.
Like sample at 2870-2880 feet. No samples.
Beds .f!.f Austin age

(electric Jog correlation)

3020-3110 3110-3130
3130-3140

No samples.
Shale, gray, soft, and sand as in sample' at 2870-2880 feet. Sample contains specimens of Foraminifera and a few Ostracodes. The Ostracodes were first obser'ved in the sample at 2870-2880 feet. No Inoceramus fragments noted.
Clay, gray, moderately soft, micaceous; pyrite nodules, and Ino ceramus fragments; cavings of limestone and fossil fragments from highe~ levels. About 50 percent of sample is fine to

a2
Dept h (feet)
3140-3160 3160-3200
3200-3220
3220-3250
3250-3260 3260-3290 3290-3300 3300-3320 3320-3330 3330-3350
3350-3360
3360-3380

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
medium-grained quartz sand containing a few cylindrical nodules of pyrite. Specimens of Cretaceous Foraminifera in the sample are, chiefly, several species of Globotruncana, Cibicide.s stephens.oni, Citharina wadei, Bulintina sp., and others.
Clay, gray, micaceous about 50 pe1cent of sample; about 50 percent fine to coarse-grained sand; samples contains Inoceramus fragments and some specimens of Cretaceous Foraminifera. Pwnulina texana and Bolivina incrassata are fairly common. .
Samples are lithologically similar to the preceding sample, and contain many fragments of Inoceramus and nodules of pyl'ite. Specimens of Cretaceous Foraminifera are fairly common, and many of them are probably indigenous. Species of Globotruncana are most common; Robulus sp. is common; and several fragments of Kyphopyxa are present. Citharina texan.a occurs at 3180-3190 feet.
Shale, brownish-gray, marly. Shale is more indurated than in the preceding samples, and contains many Inoceramus fragments. The sample contains a small amount of sand, some pyrite nodules, and a few nondiagnostic specimens of Cretaceous Foraminifera.
Shale, brownish-gray, marly, containing numerous very small specimens of Giimb elinci; and Globigerina. These minute, cream specimens of Foraminifera do not seem to be crushed, but give the shale a _slightl;1 speckled appearance. Specimens of several species of Globotrunca:na are fairly common, and specimens of Globigerina cretacea, Citharina wadei, Robulus sp., and others are present.
No sample.
Like the sample at 3220-3250 feet.
No sample. Like the sample at 3220-3250 feet.
Like the preceding sample with the addition of a small amount of very fine grained quartz sand and a little fine-grained glauconite.
Shale, brownish-gray, thinly flaky, containing a few fragments of Inoce?amus and a few nodules of pyrite. About 20 pel'cent of sample is very fine grained sand and some very fine grained< glauconite. Fauna consists mainly of very small specimens of Globigerina and Giimbelina.
No sample.
Atkinson Formation. Upper Member
(electric log correlation).
The upper member of the Atkinson Formation in this :well is a shallow-water marine facies. , Shale, brownish-marl, marly, and cavings. At 3370-3380 feet, the sample is composed of 50 percent

t' [
[ ..
~.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

83

Depth (feet)
3380-3390 3390-3410 3410-3420
3420-3450
3450-3470
3470-3480 3480-3490 3490-3500 3500-3540
3540~3550

Description

shale and 50 percent fine to coarse-grained sub-angular, clear quartz sand.

No sample.

Shale, brownish-gray, flaky, and a little fine-grained, argillaceous, inicaceoU:s, glauconitic sandstone. Sample contains specimens of Cretaceous Foraminifera, many of which seem to be caving from higher levels.

Shale, brownish-gray flaky, containing pyrite nodules, Inoceramus fragments, and small specimens of long-ranging species of Cretaceous fossils (Foraminifera). Sample . contains small' irregular-shaped nodules of siderite similar to those usually pres-

ent in sandy" beds of the upper Atkinson in the southeastern region.

Shale, brownish-gray, flaky, and fragments of whi'te, irregularly glauconitic, weakly phosphatic, calcareous, medium-grained sand.stone, containing many fragments of Ostrea-Iike fossil bivalves. About two-thirds of the sample is composed of moderately coarse, subangular, clear quartz sand that washes from the sandstone. A few specimens of species of Cretaceous Foraminic fer a . and Ostracoda in the. sample . are probably caving from higher depths.

Sandstone, fine-grained, glauconitic, irregularly micaceous, fossiliferous; fragm ents of brownish-gray, flaky shale; and very fine to coarse-grained unconsolidated sand that composes about onethird of the sample. Fragments of Inoceramus, and specimens of Gumbelina, Globigerina, and a few other non-diagnostic Cre-

taceous microfossils are present. Much of the fossil material is

probably caving from higher levels, although fragments of

Ostrea-like bivalves are probably indigenous. Shell fragments

are common in the sandstone chips. T)1e quartz grains in the

sandstone seem to be finer than 'in the. preceding samples, and

the sandstone itself is less argillaceous and calcareous.

.-

Shale, like the. preceding sample; many fragments of white, dense, fine to inedhim-grained, calcareous, irregula~ly micaceous sand"
stone; some fine to coarse-grained unconsolidated sand; and
cavings of limestone and Inoceramus fragments.

No sample.

Like sarn''ple at 3470-3480; very few specimens of Foraminifera

and few shell fragments.

Shale, brownish-gray, flaky; a few fragments of sandstone, shells, phosphatized bones', and cavings from higher levels.

Shale, brownish-gray, flaky; is about two-thirds of the sample, and one-third is fine to medium-grained unconsolidated sand, and a few fragments of white, fine-grained, calcareous, glauconitic, irreg.ularly micaceous sandstone. Sample also contains a few sp~cimens of Foraminifera, lnocerannus fragments, and cavings of limestone from higher levels.

84

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

/

Depth (feet)

Description

3550-3560

Like the preceding sample, but contains more sand and sandstone and proportionally less shale; shell fragments are cpmmon in the sandstone.

3560-3.570

. Sand, fine to moderat~ly coarse, clear quartz; a small amount of ~hale; a few fragments of sandstone; l;avings of material and fossils from higher levels.

3570-3580

No sample.

3580-3590

Like sample at 3560-3570 feet.

.3590-3600 '
3600-3Eho

No .sample.
Sand, fine to very coarse grained; some fragments of shale and shells; a few ~pecimens of Foraminifera.

3610-3630

Like sample at 3600-3610 feet; a few pink grains in :the sand, and a few fragments of very, thick shelled bivalves.

3630-3640 3640-3660 .

No samples.
Like the sample at 3610-3630;.but contains iw pink grains of sand.
Sample: contains macrofossil shell fragments and many large nodules of pyrite.

3660-3690

No samples.

3690-3720

Shale, brownish-gray, about 75 percent of sample; 25 percent fine to medium-grained sand. Sample contains a few Inoceramus fragments, and a few fragments of other bivalves. l

3720-3730

No sample:

3730-3770 3770-3780
3780-3790

Shale, brown"ish-gray ;. about 2o to 50 percent of sample is very

fine to medium-grained clear quartz sand.



t

"\ '

Shale about 75 percent of sample, and 25 . percent very fine to

medium-grained quartz sand. The s~mple contains fragments

of several .types of glauconitic' sandstone, fragments of Ino-

1 .ceramus and other fossil bivalves, and a _few specimens of

Foraminifera. .

.





0

t.

Sh;1le like the preceding sample, about ~0 percent, and about 50 ,..

percent fine to medil,Im-grained sand. Fragments of white, glau-

conitic, calcareous sandstone contain s~all pieces of shells of

fossil bivalves.


,,

Atkinson Formation. Lower Member.

3790-3800 3800-3820 3820-3830 .

Like the preceding sample with the addition of a few fragments

of light bluish-gray, hard limestone containing irregular sandy

areas.-

,,

Shale, a few fragments of fine-grained glauconitic, irregularly

micaceous sandstone, and some unconsolidated S8lld; fragments

of phosphatized bone present, and nondiagnostic specimens of

Foraminifera.



Shale, like preceding samples, and many fragments of light-gray, hard, very finely sandy limestone containing shell fragments and mica in very sandy areas; a few fragments of phosphatized

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

8~

Depth
(feet)

Description

bone are present, and a few small ostracodes that are probably

~

indigenous.

3830-3850 Shale, like preceding sample; and fragments of . sandy limestone

containing embedded shell fragments.

3850-3890 3890-3900

Shale, like preceding sample, and many fragments of light-gray, hard, dense, irregularly silty to finely sandy limestone contain-
ing small worn fragments of heavy-shelled bivalves, Ostrea? sp. and others. Shale, gray, flaky; ~bundant fragments of light-gray, hard, sandy limestone; hard, calcareous, very~ fine grained, v:ery micaceous sandstone; large nodules ' of 'crystalline pyrite; phosphatic nodules; and small irregular-shaped siderite .nodules. Fauna consists of Inoceram1ts fragments, specimens 9f small nondiagnostic Cretaceous Foraminifera (mainly Gilmbelina, Globigerina., and Globotruncana), fragments of macrofossils (in the sandstone and sandy limestone), fish-scales, a few ostracodes, and a few specimens of the foraminiferal species Ammobaculites comprimatus that occurs in beds of Woodbine age.

No sample.

Sandstone, fine to very coarse-grained, quartz, containing abundant, large, nodular fragments of siderite; the coarse sand con-
'' tains -grains of white and of pinll: feldspar. Shale like that in preceding samples, fragments of limestone, and."many nodules of

pyrite are present.

.

.,.

'

Sandstone, coarse-grained, quartz; many grains ~re stained red.

Sample contains abundant, large, siderite nodules, fragments of

flaky shale, shell fragments, a:nd various other materials;' and

a few specimens of Foraminifera 'that have' caved from higher

levels.

'

3940-3970

No samples.

3970-3980

Sandstone, very coarse grained, quartz, containing many deep-. yellow and reddish-tinted.grains.

2980-4010

No samples.

,.

Comanche Series undifferentiated

4010-4020 : _ Sand and siderite nodules as in preceding sain.ples; many f~ag

. ~ :;

. .'ments of gray shale, a few fragments bf gray red-mottled sh~le,

- ( ,

' and SOIIJe very small fragments of red clay-shale.

- :r

4020-4060

No samples.

4060-4080

Sand, very coarse, containing many yellow-tinted grains; a few :.. fragments of red and light greenish-gray mottled shale.

4080-4150 4150-4160

No samples.
Sand, coarse to very coarse, quartz, containing many yellow and reddish-tinted grains, and .a small- amount of chert and feldspar. Sample contains many fragments of mottled red, gray, and sulfur-yellow micaceous mudstone.

86

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description Pre-Cretaceous

4155

Igneous rock (electric log correlation).

4160-4190

No samples.

4090-4210

Igneous rock.

4210-4232 T.D. No samples.

COFFEE COUNTY

Operator: Carpenter Oil Company
Landowner: Composite log of C. T. Thurman wells 1 and- 2 and J. H. Knight well P
Location: See footnote 1

GGS .. Nos. 468, 509 & 508
Elevation: 317 ft. (derrick floor. Thurman welll)
Total depth : 4130 ft. (Thurman well 1)
Completed: '1955-1956

Summary of Stratigraphy Tertiary

Depth (feet)

Thickness (feet)

Miocene2 undifferentiated -----~---------------------------------------- surface 360

middle, Hawthorn Formation --------------------------~-----__:_ 360

80

Oligocene undifferentiated ___________________:__ 440

620

Eocene

upper, Ocala limestone, upper member-------------------~-- 1060

200

middle ( ?) or upper ( ?) '---------------------------------------- 1260

100

lower and middle, undifferentiated_________________ : 1360

470

Paleocene

absent?

Cretaceous Gulf
Beds of Navarro______________________________ 1830 Beds of Taylor age__________:.:_________~----------~~------- 2260 Beds of Austin age_______________________________________________________: 3015 ( ?) . Tuscaloosa Formation_______________________________~ 3250
c"Omanche.(?) undifferentiated______________ ___________~_ 3750 ( ?)

430 755 235 5oo
360

Pre-Cretaceous

to total' depth

Granite3 __ __ __ _ ___ _.__ _____ ______ ______ _ _ _ ___ 4110

20

Lithologic and paleontologic description of cuttings and cores. Samples are cuttings unless otherwise stated.

Footnotes are on page 87 .
.. :

i'
LOGS OF SELECTED WELLS IN T HE COASTAL PLAI N OF GEORGlA

----.......
87

Depth (feet)

Description Tertiary

Miocene Series undifferentiated

::

l

Surface 10 Sand, quartz, fine to very coarse grained and pebbles of sandy

limonite.

<

10- 20

Sand; clear quartz, fine to coarse-g rained, angular to subangular,

pitted or rough-textured; a. few nodules of-limonite.

20~ 30

Sand, quartz, fine to very coarse grained, like sample at 10-20 ft.; a few nodules of limonite; and a few nodules of white sandy clay.

30- 40

Sand, fine to very coarse grained, like sample at 20-30 ft., and a
few pebbles of sandy limonite. The coarse grains of sand seem
to be derived from coarse-grained,. poorly-sorted, quartzitic sandstone that was eroded, worn, transpo~ted, and redeposited at its present site.

40- 50

Sand,. like sample at 30-40 ft. The sand is yellow-stained from the matrix of deep-yellow clay in which it seems to be embedded. The sample contains a .few nodules of limonite.

k

'This c ompos ite log is based on the microscopic study of the !i tllolo~ry and paleontology of the samples from three _closely-spaced wells drilled by t he Carpenter Oil' Company. The wells are:

Land Ow~'et: C. T . Thurman well 1 Location: Land Dist. 1. Land Lot
189 center of S.E. \4

GGS. No. 468 Elevation: 3 17 ft. (derrick floor) Total depth': 4130 ft .
Completed: Sept. 21, 1955

Landowner: Location.
Landowner: L ocation:

C. T . Thurman well 2 . Land Dist. 1. Land Lot 189, 450ft. N .W. of . center of S.E . \4 .
;
;r, H. Knight well 1 Land District 1, Land Lot 144 450ft. N.W. of c enter of SE \4

GGS. No, 509 Elevation: 299 ft. (ground) Total depth: 3556 ft. Completed: May 1, 1956
GGS No. 508 T otal depth: 4151 ft. Completed: May 12, 1956

.The .samples from a well drilled by the Carpenter Oil Company near the three wells mentioned

above were studied but are not us ed in connection with the preparation of this composite log.

. The well is :

'

L a n d o w n e r : L ocation :

W. D. Wall well 1
Land Dist. 1, Land Lot 86 660 ft. north of center .
of south line

GGS. No. 510 Elevation:
Total depth: 2734 ft. Completed: May 24,. 19 56

The lith ologic and paleontologic des cripti c;ms s hown on the com~os ite lot are based on samples from the qi~erent wells a t .the depths h er e stated:

Thur man well 1

samples from

.. surface to 100 ft .

Thurman well 2 Knig ht well 1

ddoo

100 to 3510 ft. 3510 to 4080 ft:

Thurman well .

do

40 80

to

41

30
.,

..f

t.

The decis ion to pre~are a compos ite log rather than an individu a l log of each well is based,

chiefly on the f ollowing con s iderations: a) no single well provides a complete and continuous

seq uence of samples; b) the quality of the samples from .the different wells is not uniform ,

and varies at different depths in a single well: c) t he electric logs that are a vailabel for each

of th ~ t~ree ~e~l~ aid in _the ~orrelation of t he samples.

.i<~ t

..

s: 'MacNeil, F. 1 947, Geolog ic map o f T er t iary and Quaternary formations of Georgia: U.S.

Geol. Survey, Oil and Ga s [nv., Prelim. Map 12. The outcropping rocks in Coffee County

are classified on the map as , chiefly, t he undifferentiated Duplin Marl and Hawthorn F orma-

tion "of t h e Miocene series.

,



;i .

3Rock -determination fs bY R. L. Griggs , U .S. Geolo gic..al Survey (wri tten comm unication t o P . L . Applin, 1 961) , on the basis of petrographic examination of selected fragments of cuttings from the sample at 4120-4180 ft. in the Thuriiian well 1.

88

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 ,

D epth ( f eet)
50- 60

Description
Sand, like sample at 40-50 ft-., but somewhat finer grained:

60- 70 70- 80

Sand, fine ,to coarse-grained, and a few pebbles of limonite; as in
the preceding samples.
Sane( clear quart~, fine to 'medium-grained, .su~dngular. . " -~

80- 90

Sand, fine to very coarse grained, and about 25 percent fragments

of light greenish-white, waxy, bentonitic(?) clay that is sparsely

. to highly sandy. The .sand in the clay is extremely. fine to

mediu~-gr~in_ed and poorly sorted.

.

.

90- ,100

'clay, like sample at 80-90 ft., and very coarse grains of sand that may be caving fropt higher levels.

' 100- 110

Sarid, quartz, white, fine to very fine grained, suhangular; a few coarse grains; a few nodular fragments of white sandy clay.

110- 120
120-. 130 130- 140 140- 150 150- 160
~60" 170 170- 180

Like sample at 100-110 ft.; and a few fragments . of white sandy,
tubular bodies with branching centers that seem to be casts of
worm-borings or sand-c~ated plant stems. The sandy bodies' oc: ' ., cur, also, in samples fro.m the Knight well 1 af 100-110 ft4; iri the
:ft:; Thutinan welll atl30-150 and in the Wall well 1 at 160-170
it.

L. ike.

sa.mple

at

1

1

0

~

1

, 2

0

ft

Like sample at 110-120 ft. The inner .part of the tubular ~oP.ies

is partially coated with a light-brown crystalline ~ubstance.

.'

'

Sand, like sample at 100-110 ft., and about 25 percent small frag-

ments of light greenish-yellow, soapy-textUred sandy clay that

seems to be the matrix containing the sand.

...

Like sample at ,140-150 ft; The sand and th~ fra~ents of. ciay

are each about 50 percent of the washed concentrate.

_.;

Another sample from the same dep.th is composed of fine-grained .

subangular sand; 'many small, l>lack, phosphatic nodules and a

few broken, polished, phosphatic nodules; a few broken and

worn fragments of white and gray limestone showing traces of

fos~ils.. This sample may be out of ,place.: .

'



Sand a~d clay, like the first sample described ~t 150-160 f~.

Like sampl~ - ~t 160-170 ft.; sand is about 75 percent of the s~mple ; .

an<L clay is 25 percent.

_, ..,..

180- 190

s "and, clear qua"rtz, well-sorted, fine-grained, angular to. sub.ai'l.gU-

lar; a few fragments of greenish-yellow clay; sparse flakes .of

... colorle\)S :mica.

"

. , . '

1!Hi- .'2oo .. .s~nd; :fine-g~ained and about 10 percent fiaky fragme~ts of light

yellowish-tan shaly clay~ Scattered fragments of the ciay con-

. ,.,.

tain specimens ~f d~atoins:. ,





. 200- 210

Sand, fine-grained, containing small particles of magnetite; ,about

5 percent of the sample is light greenish-yellow soapy-textured

clay.

.. ,

'

'

LOGS OF SELECTED WELLS IN , THE COASTAL PLAIN OF GEORGIA

89

Depth (feet)

Description

. 210-. 220 .

Sand, fine-grained, containing a trace of colorless mica and a trace

of magnetite; small fragments of greenish-yellow clay compose

about 20 percent of the sample.



220- 230

Sand, like sample at 210-220.-ft., ap.d about 1 percent fra~ents

of greenish-yellow clay.

..

230- 240 240- 250

Like sample at 220-230 ft.

Sand and a few fragments of clay, .like the sample at 220-230 ft.,

and in addition, many small, hard, rounded, nodular fragments

of greenish-yellow clay.



250- 260

Sand, mainly fine-grained, and a few medium ito coarse grains. The sample contains a few fragments and nodules of clay like
the sample at 240-250 ft.; a trace of mica; and a few black . phosphatic nodules.

260- 270

. Like sample at 250-260 ft., but showing an increase in the amount -of small, black to gray phosphatic p.odules.

270- 280

.Sand, clear quartz, fine to medium-grained. About 5 percent of _. the sample is composed of fragment's' of lignt-cream irregularly
sandy and silty clay, and a few hard nodules -of clay.

280- 290
: ,. _

Sand, mainly fine to medium-grained,- but containing many coarse .grains. About 5 percent of the sample-is composed of fnigmerits

of sandy clay like the sample at 270.-280 ft. A very few black

. . 290.- 300.

phosphati.c, . nodules a. re present. . ,)

Sand, clear quartz, fine-grained, angular; about 6 percent of. the

sample is corripo;ed 'Of small fragments of gr~enish-yellow ~lay.

.

.

.

. t

300-. 31,0 " .Sand, clear quartz, fine to medium-grained, about 50 percent; frag-

. ," . '

~en. ts

of

light

y. ello~ish-g~..ay

clay; .

a.b.9~.t .5-0

percent.

.

310, 320 ., Like' sample at 290-300 ft.

.l

., 320~' 330 Sa'nd, 'clear quartz,- fine-grained, subangular, aiid about 10 percent '; . small,' light-gray, tan, ' and' cream; 'roinid to irregular-shaped,

-''' .,-. phosphatic nodules.

1

. 330-1' 340 ' sand, clear : quartz; fine-grained, subangrtlar, many small phos-

. phatic nodules like sample at 320~330 ft.~ and a few fragments

, :.

of light-tim, sandy cl!1y (fine-grained ~and).



340- 350 ' Lik~ saritple at 3SO-S40 ft., and about ,5 percent small fragments

..light-tan sandY clay.



I

350- 360 , 360- 370
_t.
.. _,
370- 380

Like sample at 340-350 ft. ' ,,.

. M!,ocene Series. . Haw'thorn Formation.
.. ,._Sand, clea~ qua;tz, fine 'to c~arse-grained, subangular;. about 10 . , percent small, ~l~ck to gr~y phosphatic nodtiles; and a few fragments of white, sandy, phosphatic limeston~ containing debris

of. poo!ly~preserved and broken fossil shells. Among the. fo ssils

of are fragment'S of bivalves and specimens of Barnea sp: About 5
. percerit of the ~ample is composed fra~ents of clay that are

. ..

p

r

o.

b '

ab .

l

y

c. aving

from

h.

i

g

he
-

r

levels. .

.

.

Similar to sample at 360-370 ft., but about 20 _p_ercent of the sample

~ - -

90

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

is composed of phosphatic nodules, fragments of Barnea sp., and other shell debris.

380- 390

Like sample at 370-380 ft.

1 390- 400
f.'

Sand, clear quartz, fine to medium-grained, subangular; about 25 percent black to gray phosphatic nodules; and about 5 percent fragments of soft white limestone containing small fragments of shells and a few poorly-preserved calcite molds of specimens of small Foraminifera.

400- 410

Like sample at 390-400 ft., and in addition, a few fragments of light-gray, soft, flaky, bentonitic ( '?) shale.

410- 420 .

Sand, phosphatic, like the immediately preceding samples, and a

very little white fossiliferous limestone and light-gray, ben-

tonitic (?) shale.



420- 430

Sand, like sample at 410-420 ft., and about 25 percent light-gray bentonitic (?) shale that seems to be inegularly sandy (fine-' grained sand) ; phosphatic nodules are less abundant than .in the preceding samples. The sample contains debris of gray, worn and broken molds of fossil shells, and a few fragments of rather thick-shelled fossil bivalves.

430- 440

Like sample at 420-430 ft. A fragment of light-gray limestone

-~.

contains a mold of a broken specimen of Archaias sp.

._.

440- .450

Oligocene Series undifferentiated
sa'nd, fine "to medium-grained, containing .a few phosphatic ~odules,

_.,_:. . '
"

about 50 percent of sample; cream, argillaceous, moderately

hard limestone is about 50 percent. The cream limestone, which

Y'

is somewhat spotted with light..gr~y areas, contains traces of

fossil shells, among which are fragments of bivalves, Archaias

sp., and a mold of an ostracode. The sample contains . a few

fragments of cream, finely granular, dolomitic ( ?) limestone.

.r

450- 470

Limestone, cream, chalky, _about 75 percent of -sample; about 25

percent is sand and a few phosphatic nodules. The cuttings of

limestone contain broken shells of fossils, among which are frag-

ments of. bivavles, bryozoan fragments, small" ' fragments of

Archaias cf. A. compressus, fragments._and specimens of Miogyp-

sina antillea (Cushman) and M. guntC?-i Cole and a few speci-

mens of ostracodes.

i.

470- 480

Like sample at 450-470 ft.

480- 490

Clay, "light-cream, chalky, about 75 percent of sample; about 25 percent fine-grained, angular, clear quartz sand. Sample con' tains bryozoan fragments and traces of other fragmentary fossils. _

490- 500

Sand, clear quartz, fine-grained, angular; about 1 percent small
black phosphatic nodules; about 10 percent chalky clay like

,

sample at 480-490 ft.; a few shell fragments, bryozoan fragments,

and a phosphatic mold of a speCimen of Elphidiu,m leonensis

Applin and Jordan.

!'

f.

~-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

91

,~.~- :

~

Depth

(feet)

Description

.e.~
t. ~ .

500- 510 Mainly sand like sample at 490-500 ft.; a few phosphatic nodules

~ }:'

and a little chalky clay; a few specimens of Elphif!ium leonensis.

~::

510- 520

Sand, clear quartz, fine-grained, angular to subangular; about 5

t ~

percent chalky clay shale.; a few black phosphatic nodules; and a little fossil shell debris.

~

520- 530

No sample.

f .
t
.

530- 540 540- 550

Like sample at 510-520 ft. About 10 percent of the sample is composed of chalky clay shale; shell fragments are common.
No sample.

550- 560 .Like sample at 530-540 ft.

560- 570

Clay, shaly, calcareous, and fragments of white to light-gray, moderately hard, chalky to granular limestone, showing traces of bryozoan fragments in a few chips. Some limestone f~agme:nts seem to be dolomitic, and some are nodular and sandy (finegrained sand). The sample contains a few doloinite molds of immature bivalves.

570- 580

Limestone, irregularly cream and gray, irregularly highly .'sandy

(finely-grained sand)'.



580- 590 590- '600 '
600- 610

Sand, fine-grained, angular, 50 percent; small fragments of chalky

limestone, 50 percent.



Limestone, chalky, finely porous, spongy, 75 percent~ foraminiferal

specimens 25 percent. Specimens are, chiefly, Streblus mexi-

canus mecatepecensis (Nuttall); a few other species of Fora-

minifera common in the Oligocene are also present.

Like sample at 590~600 ft.

610":- ...620
620- 630

No change.
Like sample at 5907600 ft., but containing little recognizable fossil mate1ial.

630- 640

Like sample at 620-630 ft. specimens of Streblu s .are fairly common.

640- 650 . .

Limestone, cream, chalky, containing abundant specimens of Streb-

lus mexicanus mecatepecensis, and small tubular bodies of nearly

uniform size that are possibly of algal origin.

.

650c 660

Lilce sample 640-650 ft. The sample is composed, mainly, of specimens of Streblus, a .few of the small tubular bodies mentioned in the preceding sample, a few bryozoan fragments, and a few small fragments of L ePidocyclina (Eulepidina) undosa. Cush-
man . .Similar to sample 650-660 ft., but contains no fra~ments of L epi-
. docycliria.

670- 680

Limestone, cream, soft, containing abundant specimens of Streblus

me::cicanus mecatepecen~is, a few small tubular bodies, and a

few bryozoan fragments. A little light-brown very fine grained

dolomite also occurs in the sample.



. 680- 690

Limestone, light-cream; microfossiliferous, containing many .fragments of Str eblus, 50 percent ; light-brown, very finely, crystal-

1'ffl$fF 92 !

GEORGIA GEOLOGICAL SuRVEY BULLETIN 74

Depth (feet)

Description

690- 700
700- 710 .,,,
710- 720 720- -730

line and very highly porous dolomite, 50 percent.

Sand, clear quartz, fine-grained, angular, is about one-third of sample; dolomite, like the sample at 680-690 ft., is about one~ third of sample; cream, microfossiliferous limestone like sample at 670-680 ft., is about one-third of sample.

Like. sample at 690-700 ft., and in addition, a few fragments of . very light cream coquinoid limestone and a few fragmental specimens of Lepiodcyclina (Eulepidina) undosa and Operculina dia.

Sand, fine-grained, and dolomite like sample at 680-B90 ft :, ab{;ut 10 percent; cream, probably water-worn limestone like samples beginning at 590-600 ft., 50 percent. One small fragment of Operculina dia Cole and Ponton was observed in the sample.

Sand, fine to coarse-grained; about 5 percent small fragments of

cream limestone; a few fragments of light-cream coquinoid.lime-

. stone like sample at 700-710 ft.; and a few fragments of Oper-

"''culina sp.

... .

730- .740 740- 750 750- 760
760- 770 '170- 780

Sand, like sample at 720-730 ft., but course grains are relatively n\re; about 50 percent. small fragments of c.ream, porous limestone containing many specimens of Streblua sp.

Like sample 730-740 ft.

Sand, like sample at 720-730 ft., and about 50 percent fragments .
of cream, moderately hard, finely porous, chalky limestone that .
seems to be water-worn. The sample contains a few fragments of Operculina sp., and ' a few poorly preserved specimens of Streblua that may be' caving from higher levels.

Like sample at 750-760 ft.



Sand and about 75 percent small fragments of cream, irregula~ly

and finely dolomitic limestone, like sample at 750"760 ft. The

sample contains a few specimens of Operculina dia that seem to '

be indigenous in the limestone, a few specimens of Eponides

byramensis, and a fragmental section of Lepidocyclina sp.

'780- 790 790- 800

Like sample 770-780 ft. I, .
Limestone, dolomjtic in part, somewhat fossiliferous, like limestone

in sample at 770-780 ft. The limestone contains few determinable

,.

fossils, but several specimens of Operculina dia and StreblW! seem to be indigenous.

800- 810
810- 820 820- 830 830- 840 840- 850

Limestone, cream, chalky,. partly dolomitic, like sample at 790-800 ft., and about 25 percent fine-grained sand which niay be caVing.
Dolomite, light-brown, microsucros, highly and finely porous.
Like sample at 810-820 ft.
No change.
Sand, clear quartz, fine-grained, angular, and about 5 percent fragments of dolomite like sample at 810-820 ft. A few fragments of chalky, fossiliferous limestone from several higher levels.

"' .
~, lj .
i ,.' '
~f,i\:,'
'

I'

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN- OF GEORGIA

Depth (feet)
850- 860

Description

,: ' .. .

:

Limestone, light-cream, finely porous, chalky,- calcitic, h;reg:ularly sandy (fine-grained sand). The limestone contains much poorly~

preserve.d, usually fragmental fossil material. Identifiable rna-

.terial includes molds of specimens of Quinqueloculina sp., Dis-

cQrbis sp., a few fragments of L epidocyclirui sp., a few specimens

of ostracodes, and a few echinoid spine~.

.



860- 870 870- 880

Limestone, chalky, calcitic, highly porous, like sample at .850-860

. , . ft., but rarely sandy. Some fragments of the limestone contain

traces of fossils. '

.

a Like sample ~t 860-870 ft., and 'few worn fragments of L@pido-

cyclina sp.

880- 890 890- 900

Like sample at 870-880 ft. The sample contains a few specimens of smaller Foraminifera that are probably indigenous, a few small fragments of Lepidocyclina sp., and speciniens of Streblus that are probably caving.
No ~hange,

900- 910

Material and fauna like sample at 880-890 ft. Many specimens of Streblus seem to be definitely embedded in the :limestone.

. 910 920 ' .q,

Like sample at 900-910 ft. The limestone cuttings contain a specimen of -Dictyoconus floridanus.

"'920..: 930 . 930~ 940'
940- 950

N:o change
No change. The limestone contains a trace of glauconite.
Like sa~ple at' 930.-940 ft. W~rn; broken and calcitized fossil debris
is abundant; fragments of Lepidocyclina (Eulepidina) suwanneensis Cush~an are. somewhat more common and better preserved than in the preceding samples; fragments of op&cit.iina dW, and a poorly-preserved specimen of Gypsina ;sp. ar~present.

950- 960

Like sample at 940-950 ft; Several specimens 6f Dictyoconus flori-

$"Idanus :oecur in the limestone.

f.

' 960~ 970 : Similar to sample at 950-960 ft., but containingrew specimens of

.1:, ' ~ D. floridanus.

~-: .

970 .980 ' ~ . ,
980- 990

The .cuttings of limestone .in this sample are soft~r, more chalky,

and less calcitic than thelimestone in the immediately :.preceding

samples; the fauna is more abundan~ and somewhat better pre-

served. The sample , contains many specimens of Streblus .cf.

S. byramen.Sis, small fragments of L epidocyclina sp., small frag

ments of-, chalk; ..and fossil debris composed of unidentified shell

fragments. Al1out 50 percen.t ~f -the washed concentrate.consists

of specimens of Streblus' sp~

'.,

.

. ..

Like sample at 970-980 ft.

990-1000 ~, _ ~_. ..~o . c;hange. .-. ,,'-
1000-1010 <!'.. N~ change;-.;;. :.!'

r..
):

1010-1020

Similar . to samples beginning at 970-980 ft.~ but fragments of

nodular chalk are common, and molds and fragments o'f:.:rilolds

of microfossils are less abundant.

. "

Depth (feet)
1020-1030
1030-1040
1040-1050' 1050-1060
..; .

GEORGIA GEOLOGICAL SURVEY . BULLETIN 74
Description
Chalk, white, in finely cut fragments, and a few specimens of microfossils like those in the immediately preceding samples. About 25 percent of this sample consists of small fragments of grayish-brown, very finely crystalline dolomite.
-, Like sample at 1020-1030 ft. The nodules of chalk suggest an algal deposit.
No change. Limestone, chalky, finely porous, containing worn and comminuted
fossil debris. No marked change in fauna; the sample contains a little glauconite .

Eocene Series

Upper Eocene. Ocala Limestone. Upper Member.

1060-1070

Limestone, cream, like sample at 1050-1060 ft., and about 50 per. cent fragments of white limestone containing abundant bryozoan fragments.

1070-1080

Limestone, white, porous, coquin<iid, containing calcitic areas and a trace of glauconite. The limestone is composed mainly, of fragments of Lepidocyclina (Pliolepidina) pustulosa Douville,
many fragm ents of Opcrc-ulina floridensis (Heilprin), and a fe'Y
fragments of Sph.ae1ogypsina globula and Eponides sp. Other
fossils in the sample are specimens of Asterocyclina nassattensis and Heliccstegina polygyralis. The ~icr~fauria indicates a very young late Eocene age of the limestone. .

1080-1090 1090-1100

.. Like sample at 1070-1080 ft. .
No change.

1:1.00-1110 . . No change.

,~

1110-1120 Like the immediately preceding samples, but more calcitic.

1120-1130

Like sample at 1110-1120. ft., but about 50 percent of the washed residue is composed of finely crystalline, dolomitic chalk.

1~30-1140

Like sample at 1120-1130 ft.

1140-1150

The sample is lithologically and faun.ally similar to the preceding 1.- upper Eocene samples, but fragmentary specimens of Lepidocy-
clina ocalana and fragments of Asterocyclina sp. are''much more common; a few specime.ns of Sphaerogypsina sp. are present. The sample is typical of the Ocala Limestone;

11S0-1160

Like sample at 1i40-1l50 ft.

"

1160-1170

No change.

1170-1190

No change.

1190-1200

Limestone, chalky, highly dolomitic, calcitic, coquinoid, like sample

at 1140-1150 ~., but containing little determinable fossil ma-

teJ;ial.

'

1200-1210

Like sample at 1190-1200 ft.

1210-1230

No change.

., _; ~ -~
. ,
. 1 (

I'

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

95

Depth
(feet)
1230-1240
1240-1250
1250-1260

Description

Dolomite, chalky, glauconitic, fossiliferous, composes about twothirds of the sample. About one-third of the sample is composed of fine-grained quartz sand and . many nodules of dark-green

glauconite. The fauna in the chalky dolomite is like that in the samples beginning at 1140-1150 ft.

Limestone, white, chalky, weakly glauconitic; about 50 percent of the sample is fine-grained, subangular, clear quartz sand; about 5 percent of the sample is composed of nodules of glauconite

and a little chalky dolomite that may be caving. The small amount of fossiliferous material in the chalky limestone in this sample is composed, mainly, of a few molds of .ostracodes and a few fragments of Operculina ( ?) .

Sand, clear quartz, fine-grained, subangular, composes about 50

percent of the sample; about 50 percent is composed of white,

chalky limestone that is irregularly sandy, irregularly dolomitic,

and weakly glauconitic. The size of the crystals of dolomite is

not uniform and their color ranges from light-brown to gray.

The limestone contains many very small fragments of fossil

shells, few of which are identifiable. Fragments of white-shelled

fossil bivalves and a fragment of Ps eudophragmina ( ?) were

observed.



Middle(?) Eocene or Upper(?) Eocene

1260-1270

Sand, clear quartz, fine to medium-grained, subangular, composes about 75 percent of the sample; about 25 percent is composed of dark-green, rounded but irregular-shaped nodules of glauconite. The sample contains a few fragments of chalky limestone like that in the sample at 1250-1260 ft.

1270-1280

Like sample at 1260-1270 ft., but the sand grains are slightly coarser. This sample contains a few fish teeth.

1280-1290

Sand, clear quartz, fine to coarse-grained, subangular to rounded, and about 40 percent nodules of da:rk-green galuconite.

1290-1300

Like sample at 1280-1290 ft.

1300-1310

Sand, clear quartz, fine to medium-grained, subangular, and about

> 10 perecnt nodules of dark-green glauconite.



1310-1320 ~ :, . Like sample at 1300-1310 ft.

1320-1340

No . change.

1340-1350 ; .i Sand, clear quartz, fine to medium-grained, and about 50 percent nodules of dark-g1een glauconite.

1350-1360

Like sample at 1340-1350 ft. Lower Eocene and middle Eocene undifferentiated

1360-1370

Like sample at 1340-1350 . ft., and in addition, a few fragments of white, chalky, glauconitic, fossiliferous limestone.

1370-1380

Clay, light greenish-gray, highly sandy (fine-grained sand), very finely glauconitic, slightly calcareous, soapy textured, containing a few sections of small chalky specimens of Foraminife~a. About

/. :

'GEORGIA GEOLOGICAL SURVEY. BULLETIN 74

Depth (feet)
. ' 1380-1390 139\)-1400 1400-1410
1410-1420 1420-1430 1430-14401440-1450 1450-1460
. 1460-i470
1470-1480 . 1480-1490
1490-1500 1500-1510
1510-1520

Description

75 percent of the sample. is sand and glauconite, like samples
from 1260 tO 1360 ft., and small fragments of white, chalky, fos-
. siliferous limestone like that in samples above the glauconitic .: sand. This sample also contains a few fragments of light-gray
"'Clay that is not sandy.
Like sample at 1370-1380 ft.

;No change.

Sample is about 50 percent fine to coarse-grai;ned sand, and 50 percent glauconitic nodules. The sample contains a few frag-
.. . ments of sandy, glauconitic clay, like the samples at 1370-1380 ft., and a few molds of echinoid spines th.at seem to be {ndigenous in the clay.

Like sample at 1400~1410 ft.

Like sample at .1400-1410 ft., and contahiing a few fragments of Robulus sp., presumably indigeno)lS in beds near the deptlt represented by this sample.

Sand and glauconite, like many of the preceding samples, and in addition a few fragments of light-green, silty, very finely micaceous, very finely glauconitic clay:

Like sample at 1430-1440 ft. Samples are much smaller than at higher levels, _suggesting that clay is penetrated at this depth, although sand and glauconite compose much of the sample. _

Sand, fine to coarse-grained, and about 5o percent fragments of

light-gray, moderately hard, highly silty, finely micaceous,

slightly glauconitic clay that was observed, first, in the sample

at 1430:1440 ft.



'

Clay, hi.ghly silty; which is perhaps better described as micaceous; glauconitic siltstone, composes about two-thirds of the cuttings in this sample; about one-third of the cuttings are fine-grained quartz sand.

Like sample at 1460-1470 ft., but containing ~uch less fine-grained

quartz sand.



The r elatively small washed sample is composed of a .?:few fragments of soft gray clay, and many fragments of white to lightgray moderately hard limestone showing traces of :fragmental fossil debris and a few broken calcite molds of s~all gastropods.
Like sample at 1480-1490 ft.

Limestone, yery light gray, moderately hard, like that in the samples at 1480-1500 ft. The limestone contains faint traces of a highly fragmental fossil content, but little of the material is generically indentifiable. The fossil material consists of bryozoan fragments, fragments of- molds of small gastropods and pelecypods, and a few fragments of echinoi9s.
Like sample at 1500"1510 ft.

:;_

I'

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF. GEORGIA

97

Depth (feet)
1520-1530
1530-1540
1540-1550
1550-1560
1560-1570 .1570-1580 1580-1590 1590-1600
1600-1610
1610-1620 1620-1630.
1630~1640
1640-1650 1650-1660 1660-1670
1670-1680 1680-1690

Description

Like sample at 1500-1510 ft., with the addition of a few fragments -

of sandstone, a little fine-grained sand, and many small frag-

ments of shells of fossil bivalves.



Sand, quartz, fine to very coarse grai~ed, and m_any worn and

broken shell fragments. The shell fragments usually have at-

tached sand gi-ains, or form nodules with sand grains and calcitic

cement.

. .

.

Sand, clear quartz, fine to medium-grained, and about 20 percent shell fragments and sandy calcitic nodules, like the sample at 1530-1540 ft.
Shell fragments, worn, broken, sandy, and a few limy calcite nodules are about 75 percent of the same; 25 percent of the sample is sand, like the sample at 1540-1550 ft.
Shell fragments 50 percent and sand 50 percent, 'like the sample at 1550-1560 ft.
Like sample at 1560-1570 ft.
No change.

About 75 perecnt of the washed concentrate consists of loose shell fragments, and fragments of white and gray, sandy, phosphatic coquina composed of fragmental and partly calcitized shells, molds of small bivalves, gastropods, and ostracodes, and traces of other fossil debris.
Sand, . fine to medit_lm-grained, about 75 percent of sample; 25 percent is. fragments of coquina, like the sample at 1590-1600 ft. The sample contains a few phosphatic nodules, molds of ostracodes, bryozoan fragments, fragments of molds and shells of macrofossils, and a little soft, brownish-gray to greenish-gray clay.
Like sa~ple at 1600-1610 ft.

Sand, fine to very coarse grained, and about 10 percent shell fragments and small calcareous sandy nodules.
Sand, clear quartz, fine-grained, composes most of the .sample; about 1. percent is shell fragments, sandstone nodules, and soft, gray, shaly clay. Soft clay or sandy clay is probably the material penetrated at this depth.

Sand, fine to medium-grained, and about 1 percent shell fragments, sandstone fragments and fragments of gray shaly clay.

Like sample at 1640-1650 ft.
Sand; shell fragments, and other material caving from higher levels. This small s~mple contains a few fragments of two kinds of gray and grayish-green, soft, platy shale.
Sand, clear, quartz, fine-grained, well-sorted, nodular, and a very, small amount of shell and sandstone nodules. Sand, fine t~ very coarse grained. The sample also contains a few
shell fragments, nodules of sandstone and sandy limestone, a few fragments of gray clay shale, and a few small phosphatic

Depth (feet)
1690-1700 1700-1710
1710~1720
1720-1730 1730-1740
1740-1750 1750-1760 1760-1770
1170-l780 1780-1790 1790-1800 1800-1810 1810-1820 1820-1830

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
nodules. Like sample at 1680-1690 ft. No change: Sand and a few shell fragments; shell and sand nodules like those
in the sample at 1680-1690 ft., and other higher samples; a few fragments of several types of soft, gray, shaly clay. Several fragments of clay contain poorly-preserved specimens of very' small Foraminifera; a fragment of a cup-coral is embedded in one fragment of sandy clay. Like sample at 1710-1720 ft. Sand and about 5 percent sandy shell fragments. The sample contains several phosphatic molds of ostracodes. A specimen of Loxoconcha cf. L. creolensis, indicative of beds of middle Eocene age, is attached to a small fragment of shell. No sample. Like sample at 1730-1740 ft. Sand, clear quartz, fine to medium-grained, angular to subangular; about 10 percent of the sample is composed of fragments of poorly-preserved shells of Ostrea(?) sp., and a few nodules of shells and sand. Sand; fine to very coarse gra.ined; a few shell fragments, and a few cavings of material from higher levels. Like sample at 1770-1780 ft., and many cavings. Sand, clear quartz, fine to medium-grained, angular to subangular; a few shell fragments and a few cavings. Sand, fine to very coarse grained, a few shell fragments and a few cavings. Like sample at 1800-1819 ft.; a small sample; cavings are common. . , Like ~ample at 1810-1820 ft.

\

Paleocene Series

The sampies from the three wells that are the basis for this composite log contain no faunal evidence for beds of Paleoc~ne age.

1830-1840 1840-1850

Cretaceous
Gulf Series
Beds of Navarro agf'
Sand,. fine to medium-grained, and about 10 percent small fragments of hard, cream limestone and cavings. The sample contains a few specimens of Robulus sp., a few poorly-preserved specimens of other species of Foraminifera, and a few specimens of Ostracoda.
Sand, like _sample at 1830-1840 ft., about 50 percent; about 50

,.

LOGS OF SELECTED .WELLS IN THE COASTAL PLAIN OF GEORGIA

99

Depth
(feet)
1850-1860 1860-1870 1870-1880 1880-1890 1890-1900 1900-1910 1910-1920
1920-1930
1930-1940
Hl40-1950 1950-1960 1960-1970 1970-1980 1980-2000 2000-2010

Description
percent light-cream, moderately soft, irregularly sandy limestone, containing. traces and few fragments of fossils. This material closely resembles the material .in samples at higher levels and may be caving. A few fragments of several types of light-gray clay are also in the sample.
Sand, very fine grained and al:lout 1 percent small fragments of limestone like that in the sample at 1840-1850 ft. The sample contains a few small fragments of shell and. a little mica..
a Sand, like sample, at 1850-1860 ft., and about 5 percent mica; a few cavings from higher levels; few fragments of several types of gray clay.
Like sample at 1860-1870 ft.
No change.
Sand and mica like sample at 1860-1870 ft., a few fragments of gray clay, and a few cavings. The sample contains a few speci-
. .mens of Robulus sp.
Sand, quartz, fine to coarse-grained, a few fragments of gray, soft, micaceous clay; a few fragments of materials and fossils caving from higher levels.
Like sample at 1900-1910 ft. This sample contains molds of several species of ostracodes, a fragment of Nodosaria .a-/finis, a fragment of MarginuUna linea?a, and a few fragments of Robulus navarroensis.
Like sample at 1910-1920 ft., and several specimens of species of smaller Foraminifera, including Robttlu.s navarroensis, Anomalinoides pinguis, Planulina cin-~ecta, Do1othia bul/etta, and Gaudryina r?.tdita. .
\ s and, like .immediately preceding samples, about 5() percent; about 50 percent small fragments of several types of siltstone, clay, and sandy clay, similar to material in samples at higher levels, and all probably caving. This sample contains many specimens of Robulus sp., Ano'l'l'~alina sp. and other species of smaller Foraminifera which occurred, also, in samples beginning at 18301840 ft.
Like sample at 1930-1940 ft.
No change.
Like sample at 1930-1940 ft., but specimens of ostracodes occur in the microfauna.
No change.
No change.
Sand, clear qu.artz, fine to coarse-grained, subangular, composes most of the large sample. About 5 percent of the sample is composed of small fragments of .shell, and fragments of gray clay, sandy clay, siltstone, phosphatic fragments, and a few glau-
ft : conite nodules. Specimens of species of Foraminifera and Ostra-
coda are like those in samples beginning at 1830-1840

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

\,
1.

2010-2020

Sand, clear .quartz, fine to medium-grained, subangular; also a

few fragments of clay and of fossil debris siinilar to that in

the immediately preceding samples. This sample contains a few

black, phosphatic fragments, a trace of glauconite, and a trace of

ili'ica.



2020-2030 2030-2060 2060-2070
2070-2080 2080-2090
2090-2100 2100-2110 2110-2120 2120-2130
2130-2140 2140-2150
2150-2160 2160-2170
2170-2180 2180-2190 2190-2200 2200-2210
2210-2220

Like sample at 2010-2020 ft.

No change.

Sand, clear quartz, fine-grained, angular to subangular. About 1 percent of the large sample is composed of small irregularshaped nodules of very dark green glauconite, and a few brownish-black phosphatic fragments. The sample contains a few fragments of light-gray, soft clay, and a very few fragments of caved material and fossil debris.

Like sample at 2060-2070 ft., but containing some very coarse grains of quartz and about 5 percent cavings.

Sand, clear quartz, very fine grained, angular; composes most .of the sample. Also present are a little glauconite; phosphatic ma. terial and cavings.

Like sample at 2080-2090 ft.

Like sample at 2080-2090 ft., and a small amount of colorless mica.

Like sample at 2100-2110 ft.

Sand, clear quartz, fine to medium-grained. About 5 percent of the sample is composed of small fra~ents of shells, small' nodules of glauconite~ and a few fragments of clay, fossil debri~, and other material like that in samples at higher levels. -

Like sample at 2120-2130 ft., but showing an increase in the amount
of cavings. A few black phosphatic fragments are present.
Sand, clear qu~rtz, fine~grained, angular. About i percent of the
sample is composed of cavings, small black phosphatic fragment~, , nodules of glauconite, and mica. .-

Like sample at 2140-2150 ft. .1.

No marked change in material or fauna. The fauna is composed, chiefly, of specimens of a small Robulus sp., Anomalina sp., and shell fragments.

No sample.

Like sample at 2160-2170 ft.

No change.

Sand, clear quartz, very fine to coarse-grained. About 5 percent

of the sample is composed of fragments of several kinds of gray

clay and sandy clay, a few small fragments of shell material,

a very few ..specimims of micro-fossils, a few nodules of. glau-

conite, a few nodules of pyrite, and a few small fragments of

phosphatic material. A few specimens of Robulus sp. are in the

sample.

.,

Sand, like sample at 2200-2210 ft. About 20 percent of the sample

-.. ....... ,.:

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

{01

~"

~t":e~~

Description

....

is COJ]lposed (Jf several kinds of gray and brownish-gray, soft,

f micaceous, in .part silty clay; a few shell fragments; a few

specimens of species of Foraminifera already mentioned in the

samples beginning at 1~30-1840 ft.; a few fragments of light-
a gray, soft, very fine-gra.ine<l, highly micaceous sandstone; few

nodules of glauconite, a few nodules of pyrite, and a few phos-

phatic nodules.







..:.;.

2220-2230

Sand, clear quartz; fine to medium-grained, and .about 1 percent

~;

fragments Of clay, shells, and other material like that in the

sample at 2210-2220 ft.

-

2230-2240 -Sand, fine-grained, angular, and about 1 percent small fragments

i,"

of brownishgray clay, mica, glauconite, phosphatic material,

and shell fragments; specimens of species of Foraminifera are like those in the samples beg~ning at 1830-1840 .ft.

2240-2250 , Sand, fine to coarse-grained, and" about 1 percent fragments of

t,

materials and fossils like those . in. the immediately preceding

.:

"samples. .

.

.

.

2250-2260

Like sample at 2240-2250 ft. In addition, this sample contains a

few fragments of dark brovnrish-gray, weakly micaceous clay;

J

I. . .

It

~:

,_.

very little glauconite and phosphatic material occur in the sample
Beds of Taylor Age
The top of the beds of 'Taylor age in the Thurman well 2 is placed at 2260 ft. on the b.asis of samples and electric log correlation.

2260-2270 . -!
2270-2280

Like sample at 2250-2260 ft. Like sa~ple at 2250-2260 ft., but this sample contains more ~f the
dark brownish-gray soft' clay. Small particles of mica and glauconite, and a few very small specimens of Foraminifera are emO.:
bedded in the clay.

2280-2290 .

Sand, fine to coarse-grained. About 10 percent of the sample is composed of small nodules of ve"ry dark green glauconite, fragments of dark brownish-gray clay, and a few fragments of very light yellowish-green clay. About 15 perce'nt of the sample is composed of very small fragments of other kinds of clay and other material cavingfrom higher levels.

2290-2300

Like sample at 2280-2290 ft. Glauconite is about 25 percent of this sample.

2300-2310

Sand, clear quartz, fine to coarse-grained. About 10 percent of

,.

the sample is composed of nodules of dark-green glauconite, fragments of light yellowish-green clay like sample at 2280-2290

ft., fragments of dark brownish-gray clay like samples beginning

at 2250-2260 ft., and other material that is probably caving. A,

few specimens of small Foraminifera are also probably cavings.

2310-2320

Sand, fine to coarse-grained, about 50 percent of the sample. About 50 percent of the sample is composed o.f glauconite, small frag

102
Depth (feet)
2320~2330
2330-2340 2348
2355-2360 2360-2365
2365-2370 . 2370-2375 2375-2380 2380-2385 2385-2390 2390-2395 2395-2400 ' 2400-2405
2405-2410 2410
2410-2450 2450 2450-2490 2490-2495 2495-2500 2500-2505 2505-2525

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

ments of- dark brownish-gray clay that contains specimens of

very small microfossils, fragments of. light yellowish-green clay,

and a few cavings.

~

.

.

Glauconite, green,. fine to coarse-grained; sand, like sample at

2310-2320 ft.; and about 25 percent fragments of several kinds

and colors of clay and sandy clay; a few. . shell fragments an.d
some cavings.

Like sample at 2320-2330 ft. Fragments of light yellowish-green clay is the most common kind of clay in this sample.

Circulating. Sand, clear, quartz,' fine to medium-grained, subangular, and about 40 percent small, rounded, nodules of very dark green glauconite.

Like sample at 2348 ft.

Sand, clear quartz, fine to coarse-gr~ined, s'ubangular, a~d about 50 percent nodules of dark-green glauconite that are somewhat larger than those in the sample at 2355-2360 ft.

Sand, fine to medium-grained, glauconiti.c.

Sand, like the sample at 2365-2370 ft., a few f;agments of dark brownish-gray clay, and a few Inoceramus fragments.

Sand, fine to coarse-grained; about 20 percent of the sample is glauconite; a few fragnien:ts of gray clay.

Like sample at 2375-2380 ft.

Like sample at 2375-2380 ft., but smaller and contains relatively
less glauconite.
a Sand,fine to coarse-grained, and few fragments of light-cream,
soft, chalky, sandy (fine-grained sand) clay.

Sand and a few fragments of clay.

Like sample at 2395-2400 ft. Sample contains fragments of light-

colored sandy clay (or argillaceous sand) .that was observed

first in the sample at 2390-2395 ft.



Sand, fine to very coarse-grained, 50 percent; 50 percent fragments of light-cream, sandy, chalky clay.

Circulating. Sand, quartz, medium-grained, subangular, and a few fragments of cream, sandy clay like sample at 2405-2410 ft.

No samples.

Circulating. Like sample at 2410 ft.

No samples.

Sand, clear quartz, fine-grained, and about 1 percent small nodules

of glauconite.



Sand, fine to medium-grained; a very little glauconite.

Like sample at 2495-2500 ft.

No change.

'!' .-
.r;
rt
'o.r;{.... '.;/
:.:_-.
1
;,i;.l.:
.;~~ .
~:.~..:..
~~..
II'
W~.-
l ~---:.
f.i.'

i'
LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

103

Depth (feet)

Description

2525-2530

Sand, qua1tz, fine to medium-grained. The saii!ple contains a little coarse-grained sand, a few nodules of glauconite and a few fragments of brownish-gray, somewhat silty clay. A few very minute specimens of Foraminifera and a few shell fragments occur in the clay.

2530-2535

Like sample at 2525-2530 ft.

2535-2550 2550-2555

No change.
Sand, clear q~artz, fine to medium-grained. Small nodules of darkgreen glauconite compose about 1 percent of the sample.

2555-2560

Similar to sample 2550-2555 ft., but contains some coarse grains of sand.

2560-2570

No change.

2570-2575

Sand, clear quartz, fine to moderately coarse grained, subangular. The sample contains a few nodules of glauconite and a few fragments of an Ostrea-like bivalve.

2575-2580

Sand and a little glauconite, like the sample at 2570-2575 ft.; also a few shell fragments and a trace of m.ica.

2580-2585 ' 2585-2605

Like sample at 2575-2580 ft. No change.

26052610
,, -- :. t
2610-2615. ,.

Sand, fine to medium-grained; a trace of glauconite, a few shell

: fragments, and a few specimens of Robulus n.a.varroensis, Citha-

riWL wadei, Clavulinoides insignis, and several species of ostra-

.. .codes. .

.

_.. ..





..

.Sand, clear quartz, fine to medium-grained; a few nodules of glau-

.conite, phosphatiC nodules, shell fragments and specimens of

ostracodes.







2615-2620

Like sample at 2610-2615 ft., and a few fragments of soft, gray, shaly clay.

2620-2625

Like sample at 2610-2615 ft., and in addition, a few fragments of

white, hard, sandy limestone. The sample contains a few speci-

..J...: . mens of Cretaceous species of Foraminifera. .

2625-2630

No change.

2630-2650
. 2650-2655 ... .'.

N'o ~hange.



Sand, clear qu~rtz, fine to coarse-grained, subangular. About 5

. perce'nt of the sample is composed of small amounts of shell frag-

ments,. fragments of gray, soft, micaceous clay, white, hard,

. sandy limestone;~ nbdules of glauconite, and phosphatic frag-

.>

ments.

:.~~\:

--.

2655-2660

Sand and other hlaterials like the sample at 2650-2655 ft., but

;..; coarse grains' of sand ar'e rare.
2666-2665' : ., . Lik~ sakple at 2650-2655 ft., but this sample is smaller and con-

tains many specimens of ostracodes and many fragments of dark

brownish-gray clay.

2665-2670

Sand, clear quartz, fine to coarse-grained, and about 10 percent worn, broken, sandy fragments .of Ostrea-like bivalves; frag-

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
. _;_

Depth (feet)

Description

2670 2670-2720 2720-2725

ments of light-gray;moderately hard, highly sandy limestone; a few, fragments of dark brownish-gray flaky shale; a few fragments of phosphatic material; a f ew nodules of glauconite; and rare specimens of . Cretaceous species of Foraminifera, among which are specimens of Kyphopyxa christneri.

Circulating. Like sample. at 2665-2670 ft.

;

No samples.

;, _.;

Sand, clear quartz, fine to coarse-grained, subangular, in a rela~ tively small .sample. The sample also co~tain.s about 1 percent shell fragments and a few fragments of clay and sandy .lime-
stone; a little glauconite and phosphatic material; and a few specimens of Foraminifera. Worn specimens of Robulus navarroensis and Planulina correcta are fairly .common in the fauna; other specimens . are Globigerina . saratogaensis, Gaudryinella pseudoserraUJ,, ' and specimens of ostracodes.

2725-2730

Sand, fine to coarse-grained. About 50 percent of the sample is composed of fragments of .several other materials that are chief!~ fragments of dark brownish-gray, soft day shale, containing specimens of minute Foraminifera and very fhiely fragmented . fossil shells; fragments of several kinds of very sandy light-gray limestone; a few shell fragments. The sample contains a: fe:w specimens of Foraminifera that are probably, .caving.

2730-2735

Sand, shell and other materials like the .sample at 2725-2730 ft. The sample contains a few specimens of species of Foraminifera characteristic of the beds of Taylor age, among ,which are Stensioina. americana. and Planuliita .taylorensis ;.. a few specimens of ostracodes also occur.

2735-2740

Like sample at 2730-2735 ft.

2740-2750

No change.

2750-2755

A small washed sample is con:iposed chiefly of-'fine to coarse: _ grairied quartz sand. The sample contains cuttings of sligh~ly

glauconiti-c, sandy {fine-grained sand) limestone (or calcareous,

fine-grained sandstone), and cuttings of sandy limestone in

which fragments of Inoceramus are embedded. .The limes.top~ ( ?)1 ,, . , may, in fact, be calcareous nodules in sandy . clay. A ~~.w. sheli .. . - fragments and a few . nodu~~.s of glauconite also occu~ in. ih.e

2755-2760

. ' s.ample:

1 , . , .: .. . .. 1 !:

Sand, .fine ..to coarse-grained composes the . largest part of the

sample. The sample contains about 5 percent. nodules of dark-

greeil' glauconite, and in addition, a few shell fragments and a
fe~ specimens of Foraminifera. The fos~ils'iue, in part; Creta:. taceous species (Globi{/ erina sp.) and, in p~rt, 'caving from pos~~

Cretaceous beds.

' ' .. ' '

2760-2765 2765-2770 .

Like sample at 2755-2760 ft.
Sand, fine to medium-grained, and abo~t 5 percent nodules of
dark-green :glaucoiJ.ite. _.The sample . c~ntains. also, a trace of

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

105

Depth (feet)

Description

mica, a few shell fragments, .and fragments of several kinds of
clay and sandstone.

2770-2775 ., Like. sample at 2765-2770 ft., mainly sa-ltd, but less glauconite.

2775-2780 No sample.

2780-2785

Sand, fine to coarse-grained; about 5 percent glauconite; a trace of mica; a few shell fragments; a few specimens of Robulus sp. and a few ostracodes.

2785-2790

Sand, fine-grained; a little glauconite; a trace of mica; a few specimens of Fora~inifera that are caving from higher levels.

2790-2795

Like sample at 2785-2790 ft.; a few shell raiments and a few

fragments of Inoceramus.



2795-2800

Like sample at 2790-2795 ft.

2800-2805

Sand, fine to coarse-grained; a little glauconite; a few shell fragments; a few specimens of Robulus sp., and a few ostracodes.

2805-2810 .

Sand, glauconite, and a few _specimens of Robulus sp., like sample at 2800-2805 ft.

2810 .

Circulating. Like sample at 2805-2810 ft., and a few shell fragnie~ts, including fragments of Inocer~mus.

,..

~810-2850

No samples.

28.59-2855

Sand, mainly fine to coarse-grained; about 1 percent glauconite;

a few small fragments of worn shells.

2855-2860 ,Like sample at 2850-2855 ft.

2860-2865

No change.

2865-2870

Sand, mostly fine-grained, and a few coarse grains; about 10 per- cent gla~conite; a few phosphatic fragments of clay and sa~d-
stone ; a few very small fragments of shells.

2870-2875 .

.Sand, fine to coarse-grajned;. about 1 percent glauconite; a . few - very small fragments of shells j a few nodules of several kinds
of calcareous -sandstone.

Sand, clear quartz, mainly. fine to medium-grained; about 5 per-

n.

centnodules of . glaucohite; ~ few fragments of sandstone.

2880-2885
2885-2890
' ~.
2890-2895

Sand, clear quartz, fine to medium-grained, subangular; about 1 percent glauconite; a few phosphatic fragments; a few fragments of different kinds of sandstone; a few fragments of bro. wni.sh..-gray. shale; a .few v..ery small f.ragments of shells.
Sand, clear quartz, fine-grained, angular; about 1 percent glauco~ . nite; a trace of mica; a few fragments of sandstone and a few . fragments of shells.
Like sample at 2855-2890 ft.

2895-2900

Sand and other materials like the immediately preceding sample; . coarse grains of sand are somewhat more common.

Sand, fine to coarse-grained; about 5 percent glauconite; a few shell fragments; a few fragments of several kinds of calcareous - sandstone.

Depth (feet)
2905-2910
'
2910-2915
2915-2920
2920-2925
2925-2930
2930 2930-2935
2935-2940 2940-2945 2945-2950 2954
2950-2955 2955-3005 3005-3010

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Small sample composed of material like _the sample at 2900-2905 ft. ' A few specimens of Robulus sp. occur in this sample.

Sand, fine to coarse-grained; about 1 percent glauconite; many fragments of several kinds of sandy limestone and several kinds of shaly clay that are obviously caving; relatively few fragments of worn shells. This sample is fairly large.

Sand, fine to medium-grained; about 1 percent glauconite; a few fragments of sandstone and a few of shaly clay; a few specimens of ostracodes and Foraminifera (Robulus sp. and some very small Foraminifera).

Materials like the sample at 2915-2920 ft. A few specimens of

Cretaceous species of Foraminifera which seem to be indigenous,

are: Globotruncana spp., Globigerina sp. and G~mbelma globu-
losa. Other speCimens of species indicative of the Taylor age ot

the beds are: Planulina taylorensis, Mwrginulina directa, Loxo-

stoma cushmani, and the ostracode Cythereis rugosi8si'I1UL.



'- The small, washed concentrate is composed mainly of fine to coarse-

grained quartz sand; about 1 percent glauconite; a trace of

mica, and a little lignite. Other materials in the washed sample

are, a few fragments of several kinds of calcareous, micaceous

sandstone; a .few fragments of gray and brownish-gray, soft,

shaly clay; a few specimens of Globotruncana spp. and Globi-

gerina sp. are probably indigenous; like, the specimens in the

sample at 2920-2925 ft. Other foraminiferal specimens are pres-

sent, but may be caving.



Circulating. Like sample at 2925-2930 ft.
Sand, fine tci medium-grained; fiiui-grain~d sand predominates in this fairly large sample. The sample also contains about 5 percent glauconite ; a very few sheU fragm ents; a few frag~ - ' ments of dark brownish-gray, micaceous, shaly clay containing
a few small pieces of fossil shells. The mi'crofauna is like that in the sample at 2925-2930 ft.

A small sample that is like the sample at 2930-2935 ft., and in addition, contains a little carbonaceous material..

No change.

No change.

Circulating. Sand, clear quartz, fine to coarse-grained; about 5 percent glauconite; a few shell fragments'; a few fragments of light and dark-gray, flaky, clay shalei specimens of species of Foraminifera and Ostracoda that seem to be caving fro_m several higher levels.

No change.

No change.

Sand and other materials and a few forams as in the immediately prec'eding samples; a few specimens of Planulina taylorensi8 are possibly indigenous in the beds penetrated .near this depth.

I'

LOGS OF SELECTED WELLS IN THE CoASTAL PLAIN OF GEORGIA

107

.,' .
Depth
(feet)

Description '.

3010-3015

Sand, fine to coarse-grained; about 1 percent small nodules of glauconite; a few fragments of 0Btrea-like bivavles; a few fragments of several kinds of gray and brownish-gray shale; a 'few fragments of sandstone and siltstone; afew specimens of Cretaceous Foraminifera but none are narrowly restricted forms..

Beds of Austin age

3015-3020

A small sample like the sample at 3010-3015 ft. in character and fauna, but contains many fragments of gray, flaky, micaceous shale, which may be the material penetrated at this depth.

3020-3025

Like sample at 3015-3020 ft.

3025-3030

No change. The gray flaky shale contains fragments of carbonaceous material.

3030-3035

Sand, fine to coarse-grained; about 1 percent glauconite; many fragments of gray, slightly micaceous, irregularly carbonaceous shale containing a few poorly-preserved specimens of Cretaceous Foraminifera.

3035-3040

Like sample at 3030-3035 ft.

3040-3045' No change.

3045-3050

Sand, like the preceding samples; a little glau~onite ; about 50

percent fragments of gray, slightly micaceous, irregularly car-

bonaceous shale; a few fragments of extremely fine grained,

finely glauconitic, .'calcareous sandstone, one fragm ent of which

contains a well~preserved part of a specimen of Citharina tex-

i t . ana.

3050-305{)

Shale, gray, soft, and sand like sample at 3045-3050 ft. The sample contains, in addition, fragments of light greenish-gray, ex-
, tremely fine-grained, argillaceous, calcareous sandstone, and a few specimens of Cretaceous Foraminifera.

3055-3060 ,.

Mainly sand and glauconite, but' relatively little shale. The fauna is sparse and composed of specimens of Cretaceous Foraminifera that are not narrowly r (;lstricted stratigraphically.

3060-3065

Like sample at 3055-3060 ft.

3065-3070

Sand, fine to coarse-grained; about. 25 percent fragments of gray flaky shale; a few fragments of extremely fine-grained, argil-
. laceous, calcareous sandstone ; a -few specimens of Cretaceous Foraminifera.

3070-3075

Like sample at 3065-3070 ft., but showing an increase in the peri centageof fragments of gray, shale, which is more thinly flaky
than in the preceding sample. The fauna contains a few specimens of PlanU:lina austiniana.

3075-3080 Like sample at 3070-3075 ft.; a few specimens of Planulina aus-

, . ~ I' '!. ;.' ' .

tiniana.

/

3080

Sample is composed of about 70 percent fine to coarse-grained

sand; about 5 percent glauconite; and about 25 percent frag-

i()g'

GEORGIA GEOLOGICAL SuRVEY BULLETIN 74

Depth (feet)

Description
ments of gr!ly, flaky shale, a few fragments of extremely fine grained sandstone, and a few specimens of Cretaceous Foraminifera.

3085-3095

No samples.

,. .

3095-3100

Like sample at 3080 ft.

3100-3105

No change.

3105-3110

Sand, glauconite, and a little mica, as described in samples beginning at 3015-3020 ft. The sample contains, in addition, many fragments of several kinds of gray shale, a few fragments of extremely fine grained, argillaceous, calcareous, micaceous sandstone, a few fragments of Inoceramus, and a few specimens of Cretaceous Foraminifera.

3110-3115

Like sample at 3105-3110 ft.

3115-3120

No change.

3120-3125

Gray .shale, sand, glauconite, and a few shell fragments like the sample at 3105-3110 ft.; also a .few specime~s of Cretaceous
Foramini_fera and Ostracoda.

3125-3130

Shale and sand, like sample at 3120-3125 ft.; very little glauconite; . very few specimens of Foraminifera. .. '

3130-3135 ' Like sample at 3125-3130 ft.

3135-3140

Material and fauna similar to the immediately preceding samples, .

but .very coarse grains of sand are co~~on a~ .!his depth.

! !

3140-3145

Sand, quartz, fine to very coarse grained, a little glauconite, and
a little mica, compose about 50 percent of the sample. Ab()ut 50 percent is composed of fragments of gray~ soft, thinly . flaky, slightly micaceous shale; a few _fragments of very finely granu~ .' lar limestone:; a little argillaceous, calcareous, micaceous, glau-
conitic sandstone; a few fragments of phosphatic material; and a few worn fragments of fossil shells.

. 3145-3150

Like sample at 3140-3145 ft.

3150-3155

Sand, fine to coarse-grained, and a little giauconite compose about 50 percent of the sample. About 50 percent is composed of frag~

ments of gray, soft, flaky shale; a few shell fragments; an(j a

few specimens of Foraminifera, among which are fragments

l.

of Citharina. texana. The gray shale contains irregularly dis-

tributed small -flakes of mica, minute fragments of fossil shells;

and sparse small fragments of carbonaceous material.

3155-3160 Like sample at 3150-3155 ft.

3160-3170

No change.

. .....~

3170-3175

Sand, clear quartz, fine to coarse-grained, and a little glauconite

compose about 75 percent of the sample. About. 25 percent is:

_..

composed of fragments of gray and dark brownish-gray, argil-

~.

I'

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

109

Depth (feet)

Description

laceous, micaceous siltstone, and very fine-grain-ed sandstone,

. some -of which is finely glauconitic. The sample also contains. a .few _shell fragments and a' few specimens of Cretaceous Fora~

minifera and Ostracoda.

. '

.

3175-3180

Like sample at 3170-3175 ft. A chip of gray marly shale contains

318~-3185

.an embedded fragment o{ a small bivalve.

.

ih Like sample at 70-3175. ft. Sp~ciinens of Robulus sp. are com-

.. mon in the microfauna.

, ~.:.nt:-. - .~ . .

- . ~ :~ -

3185-3250

No change. .

11

.Tuscaloosa Formation

-~ .

32,50-3260

Sand; clear quartz, fine to coarse-grained (coarse grains fai~ly

common), and a little glauconite. The sample contains a few

fragments of several kinds of gray clay "; a few fragments of

. .. . :(' I-'

siltstone; a few shell fragments; several specimens of Foramini-

<' fera and Ostracoda.

.

3260-3265

Sand; quartz, fin'e to coarse-grained, subangular; some cavings ~rom higher levels. .

3265-3270 Like sample at 3260-3265 ft. Many of the sand grains are more ' angullii than in the preceding sample, and many grains are slightly etched.

3270-3275 3275-3280

L~e sample at 3265-3270 ft., and a trace of lignite. '' No change:

3280-3285

No change; coarse grains of sand are common.

3285-3290

No change.

3290-3300 ~ Sand, quart~, fine 'to coarse-grained (medium grains strongly

dominant), like the samples beginning at 3265-3270 ft.; a few

; fragments .of - lignite; fragments of several kinds of material

caving from higher ievels.

3300-3310 (.j ' Like sample at 3290-3300 ft.

3310-3315" - ' Like sample at 3290-3300 ft.; a few sand grains are tinted :yellow

3315-3320

and pink.

' ' ..

Like sample at 3290-3300:, ft.: a~ few fragments. of lignite, imd a

t-' ; . A , . :-~ few large flakes .of colorless mica:.: .- .,

3320-3325"1' 1Like sample .iit 3315-3320 ft:' '

3325~3335 ji,

No_change<'~ -~-

:~~~- :.," ':,: ,,;::.

) !., ''_ :'

~" : '

.

3335-3340 .

33,40-3350

( u t '\ ~ ~

y.

3350-3360

3360-3370

3370-3375

Like sample at _3315-3320_ Jt., and sparse nodules of siderite.

' ' " . . ' ' . ' ''

'1:

~ ( '

I ,' ' 1 .'

~

Sand, like sample at 3335-3340 ft., but no siderite.

:tt:, S.a~d;. . ..like'

.~ample.

'a

t .

a3' 40~:3s5o

. ~nd -~ trace of mica.

. Sand, mainly quartz, and a few grains of white feldspar, : .

No change_.

3375-3380

Sand, clear quartz, fine to coarse-grained; a few spherules of

/

siderite; .a trace of lignite; a few cavings.

3380-3385

No change. ,. l:t<;., .. ~ .

Depth (feet)
3385-3420 3420-3425
3425-3430 3430-3435
3435-3440
3440-3450 3450-3460
3460-3465
3465-3470 3470-3500 3500-3505
3505~ 3510
3510-3520 3520-3590 . 3590-3600 3600-3610 3610-3620.
3620-3630
3630-367() 3670-3680
..
3680-3690 3690-3700
3700-3710 3710-'3750
3760-3760

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Desc:i-iptiori.

No change. f
Sand, like s;~ple at 3375-3380 ft., but this sample contains more
siderite spherules and more fragments of white feldspar.

No change. Sand, quartz, fine to coarse-grained (inedium grains dominant); ~
few grains of white feldspar, and a few siderite spherules.

Sand, -white, quartz, fine to coaz:se-grained (coarse grains "common). The sample contains a traceof mica; a few quartz grains tinted yellow and pink; a few grains of white feldspar; and a few nodules of siderite.

Like sample at 3435-3440 ft.

Sand, similar to sample at 3435-3440 ft.; but fine grains are dominant. The sample contains a little glauconite that is probably caving.

Sand, fine to coarse-grained; a few grains of white feldspar; a few nodules of siderite; a few cavings.

Like sample at 3460-3465 ft.

No change.

Sand, quartz, fine to c-oarse-grained, subangular and a little white

hl~p~

.

- ~

Sand,-like sample at 3500-3505 ft.; a few quartz grains are tinted pink. The sample contains a few nodules of si.d.e, rite.
No change.

No change.

Similar to sample at 3505-3510 ft.; a trace of white feldspar. , .

.

'

*'

No change.

..

Sand, coarse-grained, pink-tinted grains are fairly common; a few. .

nodules of siderite.



Sand, clear quartz, fine to coarse-grained (coarse grains strongly dominant) ; a few grains of white feldspar; a few nodules of siderite. Some quartz grains are tinted pink. .

Like sample at 3620-3630 ft. t:

Sand,. clear quartz, and a few pink. grains; the sand is somewh~t

finer grained than in the sample at 3620-3630 ft. The sampie

contains a few nodules of siderite, a few grains of white feldspar,

and a few small grains ~f obsidian ( ?) :

Lik.e

samPle

at 3670-368.0

ft.;

obsidian ( ?.) iS ra~e.

,

-~

.

.,lo :...

Sand, clear quartz, coarse to very coarse grained; a few grains

of pink-tinted quartz; a few grains of white feldspar:

Like sample at 3690-3700 ft..

No change.

.

Comanche Series (?) undifferentiated

Sand, like immediately preceding samples. The sample contains, hi

.. s
I'

1.

:;

:u .lJ_@)! .).

LOGS OF SELEcTED WELLS IN THE COASTAL PLAIN OF GEORGIA

{11

Depth (feet)
3760-3770 3770-3810 3810-3820 3820-3850 3850-3860 3860-3870
3870-3880
3880-3890 3890-3900 3900-3910 3910-3920 3920-3930 '
3930-3940 3940-3950 3950-3960
3960-3970 3970-3980 3980-3990

Description

addition, a few nodules of siderite, and a few fragments of red, yellow, and gray mottled, micaceous silty mudstone. The unfossiliferous mudstone is lithologically similar to rocks that have been clas~ified as Comanche in .many wells in the southeastern Gulf Coast region. On "the basis of the highest occ~rrence of the mud.ston!! in the Knight ~ell 1, supported by electric log characteristics, the top of the Comanche ( ?) is placed at 3750 ft.

Like sample at 3750-3760 ft.
No change.

Sand, clear quartz, coarse to very coarse-grained; a few grains of white feldspar. A few of the quartz grains are tinted pink.

Like sample at 3810-3820 ft.

Like sample at 3810-3820 ft., but this sample contains more white feldspar.

Sand, coarse to very coarse grained;- a few pink-tinted grains of ' quartz; a few grains of white feldspar; a few grains of ob-
sidian ( ?) ; and a ew moderately large nodules of siderite.

Sand and other materials like sample at 3860-3870 ft., and in addi-

tion, fragments of hght yellowish-green clay and red, .f{nely

micaceous clay.



Sand, white, very coarse grained; a few grains of white feldspar. A few quartz grains are tinted pink.

Sand, similar to the sample at 3880-3890 :ft., but coarser grained; grains of white feldspar are fairly common.

Like sample at 3890-3900 ft., and in addition, a few fragments of red and greenish-yellow mottled micaceous clay.

Like sample 3900-3910 ft., but contains no mottled clay.

Sand, quartz, fine to very coarse-grained, and a little white feld- spar. The sample contains, in addition, a few nodules of siderite, fragments of red, gray and greenish-yellow mottled, finely micaceous clay, and cavings of other materials.

Like sample at 3920-3930 ft.

Like sample at 3920-3930 ft., but contains more coarse grains of sand.

Sand, fine to very coarse grained; a few nodules of sandy siderite; a little limonite; many fragments of dark-red micaceous shale, greenish-yellow arid gray mottled shale, and red and lightraspberry mottled shale. This sample contains other materials that are caving from higher levels.

Sand, fine to very coarse grained, like samples at 3950-3960 ft., and a very small amount of vari-colored shale.

Like sample at 3960-3970 ft.

Sand, fine to very coarse grained (coarse grains compose about 50 percent), and a little varicolored shale; a few nodules .of

112

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth ( f ee t )
3990-4000 4000-4030 4030-4040 4040-4050 4050-4060 4060-4070 4070-4080 4080-4090
4090-4100
4100-4110

Description

siderite and cavirigs of various materials are components of the sample. ,.,..

Like sample at 3980-3990 ft.

No change.

Sand, like sampfe at 3980-3990. ft.; yellow-tinted grains are fairly

common. The sample contains a little yellow feldspar.

Like sample at 4030-4040 ft. and a few fragments of bluish-gray,

weakly sandy (very fine grained sand) shaly clay.

Like sample at 4040-4050 ft., but fragments of the shaly clay are

much more abundant.





No change. No change.

Sand, yellow and red, fine to very coarse grained, the coarse grains
being dominant; a few grains of feldspar; a trace of mica; and
a fe.w fragments of brick-red clay. . Sand, like sample at 4080~4090 ft.; grains of feldspar of vario~s
colors are common in the sand. The sample contains a few frag-
ments of red and white mottled, sandy, micaceous clay. '

Sand, like sample at 4090-4100 ft., but the grains are slightly coarser. The ..sample contailis a trace of . red, .sandy, micaceous clay.

Pre-Cretaceous rocks
4110-4130 T.D. Sand, like sample at 4100-4110 ft., and fragments of granite. The top of the granite in the .Thurman well 1 is placed at 4110 ft. . on the basis of electric log correlation and the petrographic
. determination of selected fragments, of c.uttings...

COLQUI'IT COUNTY

Operator: R. T. Adams
Landowner: D. G. Arrington Well 1
Location: Land District 8, Land Lot 270 ; 760 ft. west of east line; 210 ft. north of south line of land lot . 270.

GGS. No. 170
Elevation: 270 (est.)
Total depth: 4904 ft. Completed: Aug. 25,1948

.i
I
]


LOGS OF SELECTED WELLS I N THE COASTAL PLAIN OF GEORGIA

113

Summary of Stratigraphy

Tertiary

Depth (feet)

Thlckneaa (feet)

Not studied

Cretaceous

Gulf Beds of Navarro age_________________________________,_.__::________ 1680
Beds of Taylor age_____________________~-----~-~----------- 1900 Beds of Austin age_______ _____~----------- - - -- 2440? Atkinson Formation upper member_____________ 2806
lower member________________ 3290

220:
540 366? 484 220

Comanche undifferentiated -"--..::---------------------------------- 3510 total 1394 depth
Lithologic and paleontologic descriptions of cuttings and cores. Samples are cuttings unless otherwise stated.

Depth (feet)
. 0-1680

Description
Samples not studied.
CretaceQus

Gulf Series

1680-1690. 1690-1900

Beds of Navarro .age

.

.

.

. Shale, gray, and a little fine-gi'a~ned sand probably indicate the

material drilled at this depth; the fauna consists of a few speci-

mens of Globotruncana area and a few specimens of other Cre-

taceous species of F-oraminifera. The sample contains many

fragments of Limestone from the overlying Clayton (Midway)

-. Formation.

Lithology and fauna like the sample at 1680-1690 ft.

Beds of Taylor age

1900-1910

Shale, gray, and many fragments of gray, sandy (very fine grained sand) clay shale, and light-gray, hard, very fine grained sandstone.

1910-1920

Like sample at 1900-1910 ft.; sample contains abundant specimen~ . of Lituola taylorensis.

1920-2060 Samples not studied in detail.

2060-2070
. ,

Shale, gray, a little sandy shale, and specimens of Globorotalites conicus, Plan~lina dumblei and Stensiiiina americCLna..

/

2070-2710

Samplesnot studied in detail.

Depth (feet)
2710
2710
2725 2731
2806
2850-2860
2860-2870 2870-2880 2880-3000
3000-3010 3010-3020 3020-3030 3030-3060 3060-3070

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description
Beds of Austin age
Sidewall coi'e. Shale, gray, contalning glauconite and pyrite, fragments and prisms of Inoceramus, many specimens of Citharina texana, and a few specimens of other Foraminifera, mainly Globot-runcana sp.
Sidewall core. Shale, gray, soft, chalky, containing abundant.Inoceramus prisms and specimens, of Citharina texana; specimens of Gumbelinci sp. and Globigerina sp. are common.
Sidewall core. Sandstone, cream, moderately hard, chalky, very firie-graine'd, glauconitic; contains fragments of Ostrea sp.
Sidewall core. Shale, gray, soft, sandy (very fine grained sand), glauconitic. Fauna consists mainly of specimens of a small Anomalina sp. indicative of the beds of Austin age.

Atkinson Formation. Upper Member.

Sidewall core.

Shale, gray, soft, fine-grained, argillaceous, containing a few fragments of phosphatic material, carbonaceous material, and a little mica.

Shale, gray, containing many fragments of Ostrea sp., a little
carbonaceous material; and a few fragments. of white, medium to fine-grained, somewhat phosphatic, slightly glauconitic sand~ stone. The fragments of Ost1ea sp. are probably indigenous,
but the few specimens of Foraminifera in the sample seem --to cave from higher levels.

Like the sample at 2850-2860 ft.

Like the sample at 2850-2860 ft., and containing a few fragments . of grayish-green shale.

No change. The specimens of Foraminifera are species that occur

in the lower part of the beds of Austin age; species indicative.

of the upper member of the 'Atkinson Formation (Eagle Ford

age) were not observed.

..

Like the samples at 2880-3000 ft., with the addition of grains of coarse sand.

Samples not studied.

Sand, coarse to very coarse, and a little nodular sandstone.

Samples not studied.

Sand, fine to coarse-grained (coarse grains common). The sample contains a few fragments of white, moderately hard, medium- , grained sandstone showing a few pink-tinted grains.

r
l;:
r~ ,t ~ .
~::
!7
i:.

__ Q ~
I'

$ _ JLW Ht u lh . t#A.-4 --

L OGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

.115

Depth (feet)
3070-3200 3200-3210
3210-3220 3220-3230 3230-3240
3240-3290

D escription
Samples are like the. sample at 3060-3070 ft. and contain cavings in variable amounts.
Sand and sandstone like the immediately preceding samples, and also many fragments of white, moderately hard, fine to mediumgrained, glauconitic, somewhat phosphatic sandstone.
Like sample at 3200-3_210 ft., showing an increase in the amQunt of glauconitic sandstone.
Sample not studied.
Sample is mainly cavings, and the material drilled at this depth is not clearly shown. The material in the sample consists of gray shale (probably from the beds of Austin age), a few fragments of glauconitic sandstone like that in the samples at 32003220 ft., and specimens of Foraminifera from higher levels. The sample contains fragments of carbonaceous material that increase progressively with depth from 3240 to 3290 ft.
Samples not studied in detail.

3290-3300 3300-3320 3320-3330 3330-3340
3340-3510

Atkinson Formation. Lower Member.
Like sample at. 3230-3240 ft., and in addition, many fragments of white, fine to medium-grained, calcareous, glauconitic, somewhat micaceous sandstone containing many fragments of shells (Ostrea sp. and possibly other fossil bivalves).
Samples not studied.
Shale, dark-gray, hard, flaky, is probably the material drilled at this depth. The sample contains much gray clay shale that is caving from higher levels.
The sample shows an increase in the amount of dark-gray, micaceous shale described. in the sample at 3320-3330 ft. The microfauna seems to be mainly caving from higher levels. Specimens of Foraminifera indicative of the lower'member of the Atkinson Formation do not. see!ll to occur in this sample, possibly because of the small amount of dark-gray shale in proportion to the large quantity of cavings. It is possible, also, that specimens, if present, were removed from the sample prior to this study.
Samples are mainly cavings of gray clay shale, dark micaceous shale, fine-grained sand, and glauconite; the microfauna is sparse and seems to have caved from higher levels.

3513
3520-3030
/
3530-3540

Comanche Series undifferentiated
Materials similar to those described in the sample from 3340 to 3510 ft., and also a little coarse-grained quartz sand.
'sand, coarse-grained, quartz; a few fragments of waxy, mustardcolored, red mottled shale; many cavings.
Like sample at 3520-3530 ft.

/
GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

3540-3550

Like sample at 3530-3540 ft., and a few fragments of greenishbrown, red and light-gray mottled micaceous shale.

3550-3560 3560-3570

Like sample at 3540-3550 ft.
Sand, fine to very coarse grained (coarse grains common) quartz,
and a few grains of felilspar; some of the quartz grains are redtinted. Sand is about 50 percent of the sample. A few fragments
of mottled or varicolored shale and cavings from higher levels compose about 50 pe~cent of the sample.

3570-3600

No change.

3600-3610

Sand, varicolored shale, and cavings, like the sample at 3560-3570 ft., and many fragments of dark purplish-red, micaceous shale.

3610-3630

Sample not described.

3630-3640

Sand, 50 percent of sample, and 50 percent cavings of gray clay shale and a few fragments.of red and mottled shale.

3640-3770

No change.

3770-3780

Sand, fine-grained, many fragments of brownish to purplish-red, gray and mustard-colored, micaceous shale, and many cavings.

3780-3800

No change.

3800-3810

Sand, white, mainly coarse-grained, quartz; a few amber and pinktinted grains; a few grains of feldspar; a little red and mottled shale; cavings.

3810-4904 T.D. Samples not studied in detail. The material is sand, sandy clay, and varicolored clay, and is seemingly not older than Comanche.

COLQUITT COUNTY

Owner: :.City of Moultrie, well 3

GGS No.

,

Elevation: 340 ft. (est.)

Total depth: 745ft..

Completed: Aug. ( ?) 1936

Summary of Stratigraphy

Depth (feet)

" (. Thickness
(feet)

Tertiary

Pliocene to Reeent 1 sa~ple at 150 ft------------------------~ ?

?

Miocene undifferentiated ------------~,------------ 165

243

Oligocene

do

408

262

E:ocene

to upper, Ocala Limestone, upper member _____________ 670 total 75

J
'l

depth

.L I'

' . JE .AWPt

;e .4

a a . J.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

117

Lithologic and paleontologic descriptions of cutting s~_mples.

-J. Depth ... 't,!
(feet}

Description

Pliocene Series to Recent Series

"':i 150
;:

Sand; coarse-grained, subangular, clear quartz, and a few r~qdish brown and gray sandy nodules.

Miocene. Series u~differentiated

. ' 165
~- . '

Clay, white, sandy (fine-grained sand). . Washed residue, large. Sand, fine-grained, moderately even-grain-
ed, angular, clear quartz, and a few nodules of clay.

., 170

Clay, white to,light-green, sandy (fine-grained sand). Washed residue, large. Sand, very uneven-grained, clear quartz,
and about 25 percent nodules of hard clay.

200
210 ~~ I
J~ -

Clay, light-green. Washed residue, very small. Sand, un~ven-grained, angular, clear

quartz.

; .~ Clay, light-green.

.

Washed residue, small. Sand, uneven-grained, angular, clear

quartz, and about 10 percent small nodular fragments of light-

green clay.

220
.1
230
... 235

Clay, light-green, sandy.
Washed residue, moderately small.. Sand, very fine grained, evengrained, angular, clear quartz, and a few fragments of hard
clay. Clay, Iight-gr~en and tan, fairly hard. . Washed residue, moderately_small. Clay, and about 25 percent
very fine grained, clear quartz sand, and a few chalky lime
nodules. Clay, light-green arid Iight~tan, sa~dy (fine-grained sand), slightly . . calcareous. Washed residue, moderately large. Clay, and about 21!. percent
fine-grained, angular, clear quartz sand.

240 ( ?)

Clay, light-green, somewhat sandy. Washed residue, small. Clay, and about 50 percent fine-grained
clear q-uartz sand. ..

245

Like samples at 240(?) ft.

250

Clay, light-green, fairly hard, sandy (fine-grained sand), and a

few chalky lfme nodules;

Washed residue, small. Clay, and a small amount of sand.

260

Clay, olive-green, and lime nodules.

Washed residue. Sand, moderately fine-grained, even-grained,

clear quartz, and a few nodules of hard sandy clay.

270
/

Like the sample at 260 ft.

. - !!iii

Depth (feet)
280 290 305 325 365 370 390
408
420 430 440 465

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Washed residue, large. Nodular fragments of sandy clay. Material and washed residue like sample at 270 ft., with the addi-
tion of a few fragments of grayish-green, flaky, somewhat carbonaceous shale. Clay, olive-green, and nodules of white, calcareous clay. Washed residue, moderately large. Clay, nodular, highly sandy, calcareous, and about 25 percent very uneven grained, clear quartz sand and a few fragments of olive-green shale. Clay, olive-green, and cream, calcareous, Sandy nodules. Washed residue, moderately large. Clay, nodular, sandy, calcareous, and about 50 percent, uneven-grained, clear quartz sand and many fragments of light-green, shaly clay.
Clay, olive-green. Washed residue, moderately large. Clay, nodular, hard, sandy, cal-
careous, and a little uneven-grained,clear quartz sand. Like the sample at 325 ft., with the addition of a few cream nodules
of hard .sandy chalk. Clay, cream, shaly, sandy, unctuous. Washed residue, moderately large; composed of angular fragments
of the clay, and about 50 percent fine-grained, moderately even g,rained, angular, clear quartz sand. Clay, olive-green, sandy. Washed residue, moderately large. Sand, fine to coars-e-grained, angular, clear quartz; a few fragments of carbonaceous material; about 10 percent nodules of the olive-green hard clay.

Oligocene Series undifferentiated

Clay, green, nodular, and fragments of white, chalky, sandy lime-

stone.



Washed residue, large. Fragments of the clay and limestone, and
a little uneven-grained, clear quartz sand that washes from the clay nodules; a .few poorly-preserved molds of ostracode cara~ paces, and a f ew vague impressions of fragments of fossils in the limestone cuttings.

Limestone, white, chalky, somewhat sandy; fragments of olive-

green, sandy, shaly clay; a little clear quartz sand.

~'

Limestone, white, sandy, very finely granular, containing impressions of fragments of fossils; a little clear quartz sand. The fossils are Pecten sp. and others that are not determinable.

Limestone, greenish-brown, nodular, dense, sandy, unfossiliferous( ?) .

Clay, green, shaly, and a few limestone nodules. Washed residue, small. Sand, uneven-grained, Clear quartz; a few
nodular, calcareous, sandy fragments of the green shaly. clay; and a few reddish-yellow sandy nodules.

,.

0 I I.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

119

:Pepth (feet)
480
500
,,.
515 530
540
550 560 575 585
' . . '
595 .;-.. "- Ji
605 . 6_15 ,.
. t.- . ,, , . .....
: !! ..... ~ -~
625
635
650 660

Description

Limestone, light-gray, hard, nodular, fossiliferous, and a few nodular fragments of brown, granular dolomite. The fossils are usually firmly embedded in the hard limestone nodules, and seem to be water-worn, but calcitized specimens of Lepidocyclina cf. L. chattahoocheiinsis, Gypsina globula, and a few miliolids and fragments of Pecten sp. were identified.

Limestone, cream, hard, nodular, fossiliferous,: lithologically and faunally similar to the sample at 480 ft. In addition to the fauna in the preceding sample, the limestone contains bryozoan fragments, a few highly ornamented echinoid spines, a few worn specimens of Ca.merina sp., ostracode carapaces, a large speci. men of Quinqueloculina sp., Asterigerina sp., and a number of specimens of Rotaliidae, including Rotalia cf. R. m exicana var.

Dolomite, brown, granular, crystalline, a:nd about 15 percent small fragments of white, chalky coquina.

Coquina, chalky, por ous, and a few nodular fragments of brown, granular dolomite; abundant fragments of Pecten sp., Bryozoa, and echinoid spines; specimens of L epidocyclina mantelli, Operculina? sp., Rotalia mexicana var., Quinqueloculina sp., Asterigerina cf. A. subacuta, and Discorbis patteliformis are common.

Like the sample at 530 ft., with specimens added to the fauna as follows : Gypsina .globu la (common), Eponides sp. and Asterigerina sp. (.very common). Rotalia cf. R. mexicana var. is rare in this sample.

Like sample at 540 ft.

Dolomite, brown, granular, crystalline, and a few fragments of coquina, probably from closely overlying levels.

Like the sample at:560 ft.

Limestone, brown, granular, crystalline to cryptocrystalline, in

which ' chalky fragffierits of specimens of L epidocyciina cf. L.

pseudomarginata and some fragments of Pecten sp. are em-

bedded.

tt'

;",

~ ... .

;.,.,

Like sample at 585 ft., but containing more apundant fossil ma-

. terial.

Like samp!e at 595. ~~ :)



.Dolomite, brown to light-tan, finely granular, somewhat chalky;

. fauna like the immediately preceding samples.

Like the sample at 615 ft.,but the fauna consists only of a few

sections of small miliolids. .A few specimens of Lepidocyclina sp.

in the sample may have caved from higher Jev~ls.

.

Limestone, dark-brown to cream, finely granular, crystalline, porous, containing a few very poorly preserved calcitized frag- ments of shell material and L epidocyclina ( ?) sp.

Like the sample at 635 ft.

No change.

/

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description
Eocene Series

Upper Eocene. Ocala Limestone. Upper Member. '< '

670

Limestone, white, chalky, fossiliferous, and about 20 percent nodu-

lar fragments of brown dolomite. The fauna consists of frag-

ments of specimens of A sterocyclina georgiana; fragments of

echinoids and echinoid spines; bryozoan fragments; fragment of

bivalve (genus not determinable); fragments of specimens of

R obulus alato-limbatus, Pecten sp., Eponides cf. E. jacksonensis,

and Massil~na sp.

700

Limestone, ian to cream, granular, crystalline,.: and a few frag-

ments of coquina caving from higher levels; a few fragments of

. of L epidocyclina sp. and echinoids...

. 710

Most of this sample is like the one at 700 ft. but contains many

fragments of . light . grayish-cream crypto-crystalline, porous

, limestone in which are embedded many sections of small miliolids, a,nd a few molds of fragments of other fossils.

720

Limestone, chalky, nodular, mictofossiliferous. The fauna is com-

posed of bryozoan fragments and fragme.nts of Asterocyclina

ge orgiana and other species; also sp'ecimens of Robulus alato-
limbfLtus, Eponides jacksonensis, -and .a few other Rotali~dae.

745 T.D. -

Limestone, white, chalky,. highly fo~siliferous; bryozoan fragments are abundant; specimens of Foraminifera in the sample are Asterocyclina georgiana, Robulus alato-limbatus, Epon:ides jacksonensis, and others.

."- I
DECATUR COUNTY*

U. .,
.Owner. Operator:



, ~ . ; . _I!_ : .

S. (War Depart-

GGS. No: 55

ment) Bainbridge Basic Flying . 1

. .

. '(.\-' ~ ,

School Well 2

Elevation: 135

_Location: 6 -mi. northwest .of .,

:.:r'o~al depth: 422 ft..:;,.. .

Bainbridge, Ga. -

.

Completed: June 19, 1942

~ .'

. .- (

Summary of St~atlgraphy .

'Depth

,do : .r;>
Thickness

<..

: --~ -~

(feet)

(feet) ,

,. .

.Tertiary .

.

-~ -.0

01I.goeene.(?.-) ..or Eoc. ene(?) .____ (1.s''amr:p..le) _______________.___ .. 82

?

I



I

'

,

:

.J

',

[ '

: o

. (jo'

In Eocene .

.

.

A

,'

upper:, Ocala Limest~ne; " upper'member::_-::______ . ~ , 100

55

. .. ,



lower . m.emb.e:t:--.~...:..:.__~_,________ , 155

upper

middle,

Avon

Park

L

i

m

e

s

t

on '~

e ___ -

__-_-

__ ..

. ____;___
.. - . .



230

' 75 ~1.(. ;;. 55'

,('

f~

*Publication of this data is authorized by the sun Oil Compa,;y; for wlio1r1 the reporf was

'j..

prepared on a commercial basis4

.) . 5 2 l.i $pI AI

:z 4641 x uu; q

LoGs OF SELECTED WELLS IN THE CoASTAL PLAn:r oF GEORGIA

121

D~pth
(feet)

Thickness (feet)

to _ lower middle, Lake City Limestone ( ?) ________________________ 285 total137

depth

Lithologic and paleontologic description of cut-
tings and cores. Samples are cuttings unless otherwise stated.

Depth (feet)
82

Description
Tertiary
Oligocene(?) or Eocene(?) Sand, cle~r quartz, fine-grained, and very finely <;Ut fragments
of hard, white, chalky limestone.

In Eocene Upper Eocene. Ocala Limestone. Upper Memb~r.

100

Limestone, white, chalky, fossiliferous, containing worn fragments

-

,. of molds and a few sections of Heterostegina .ocalana, Sphaero-

gypsina globula, and Amphistegina pinarensis cosdeni.

110 .

Limestone, white, hard, chalky, in nodular fragments that seem ' 1 to be water-worn. The limestone contains worn molds of Le~
docyclina sp. and Sphaerogypsina sp.

-120 ,.. Limestone, light-cream, mode.rately hard, chalky containing traces

J

'' of fossils, among which fragmental sections of Lepidocyclina sp.

are fairly common.

125

Limestone, chalky, porous, similar to sample at 120 ft. Very little

1' ' of the fossil material is determinable, but poorly-preserved

fragments of Lepidocyclina sp. are present.

130

'- Like sample at 125 ft.

144

Like sample at 125 ft.

Upper Eocene. Ocala Limestone. Upper Member.

155

Like sample at 125 ft. Sample contains specimens of. Amphistegi~

pinarensis var., and a few specimens of small Foraminifera

typical of the lower member of the Ocala Limestone.

' 168

Limestone, chalky, fossiliferous, having a water-worn appearance.

The fauna consists of bryozoan fragments (common), fragments of ~pecimtm~ of Lepidocyciina ocalana, Asterocyclina sp.,

Amphistegina alabamensis, and specimens of small Foramini-

fera characteristic of the lower member of the Ocala Limestone.

178

Like sample at 168 ft.

195

.Limestone, chalky, fossiliferous. The fossils are better preserved

. than in the preceding samples, and the fauna contains several

... --!SSii!ij

Depth (feet)
210 215 220 225
230 235 238
240 245 248
285 295

GEORGIA GEOLOGICAL SURVEY' BULLETIN 74
Description
varieties of Lepidocyclina ocalana, and many specimens of Amphistegina alabamensis and A: pinarensis var. Limestone, . white, dense, containing traces of fossils; also some fragments of white, crystalline, gypsiferous limest~ne. The cuttings of limestone are very small. Limestone, white, dense. The sample is composed of finely cut fragments. Limestone, white, nodular. The sample is composed of finely cut fragments. Like sample at 220 ft. The limestone contains molds of small Foraminifera that are too poorly preserved for identification.
Upper Middle Eocene._ Avon Park Limestone.
Limestone, white, chalky, moderately hard, containing specimens of Dictyoconus florida.nus and Valvulina sp.
Limestone, white, chalky, partly crystalline, containing specimens of Dictyoconus floricla.nus 'and poorly preserved molds of smaller Foraminifera.
Limestone,. white, chalky, having a water-worn appearance. The fauna consists of poorly-preserved specimens that are cliiefly fragments of Lepidocyclina sp., Qperculina sp., , and Ca1nerina sp., as in samples above 230, ft., and consequently may be caving, in part.
Limestone, white, nodu.lar (small p.odules), somewhat calcitic, containing a few poorly-preserved, largely unidentifiable molds of smaller Foraminifera, am~mg which are specimens of a small Cibicides sp. and a few other qtiestionable rota!id forms.
Limestone, white, chalky, porous, nodular (small nodules), s~mewhat calcitic, containing specimens of several species of miliolids, and specimens of Coskinolina jzoridana an!). Valvulammina sp. common in the Avon Park Limestone.
Like sample at 245 ft.
Lower Middle Eocene. Lake City Limestone
(probable equivalent).
Limestone, white, dense, chalky, slightly glauconitic. The sample contains many poorly-preserved molds and fragments of Lepidocyclina sp., some of which may be caving from higher levels, but some are definitely indigenous, as L epidocyclina pustulosa.
Limestone, in part chalky, in pint dolomitic; crystals of dolomite are scattered 'through the chalky material. The limestone contains a little glauconite, and a few fragmen-ts of molds and small fragmental sections of LePidocyclina sp. Like the sample. at 285 ft., some of the fossil fragments may be caving.

LOGS OF SELECTEJ? WELLS IN THE COASTAL PLAIN OF GEORGIA

123

Depth Ueet)
315
'""< .I
325 330
340
365 373 422 T.D.

Description
Sandstone, very fine grained, slightly glauconitic (fine-grained glauconite), is about 80 perce!Jt of the sample. About 20 percent of the sample is composed of small chalky fragments, much of which is probably worn and broken fossil debris that was irregularly scattered in the sandstone. Bryozoan fragments are common.
Sandstone, grayish-tan, very fine grained, calcitic, slightly glauconitic, like sample at 315 ft.; a few chalky fragments are present.
Sandstone, highly calcareous, very fine grained, slightly glauconitic. Many fragments of chalky, glauconitic limestone contain traces and fragments of fossils that indicate the material is probably caving from higher levels.
Limestone, white, chalky, glauconitic, containing many fragments of Operculinoides sp., Camerina sp., L epidocyclina (Polylepidina) antillea, and Discocyclina flintensis.
Limestone, light bluish-gray, hard, dense, containing small scat;;;. tered particles of glauconite.
Like sample at 365 ft.
Limestone, light-gray, moderately hard, sandy, glauconitic , (finegrained glauconite); no indigenous fossils.

DECATUR COUNTY*

Owner Operator: U.S. (War Department) Bainbridge Basic 'Flying
School Well 1 Landowner: , Location: 6 .mL northwest of Bain-
bridge, Ga.; and about 3; 4 mi. south-
..west of Georgia Highway 1.

GGS. No. 57 Elevation: 130 ft.
Total depth: 1035 ft. . Completed: May 28, 1942

Summary of Stratigraphy

Depth (feet)

Tertiary

., ,. :t

Miocene(?) undifferentiated

(1 -sample) _ ____:_ 20

Oligocene(?) do

(1 sample) _____ _ . 55

--No , samples_c.__,__ _________ ________._ ___ ___________ , 60

In ' Eocene



upper;Ocala Lhnestone, upper member________________"_ 115'

lower member________ _ _ 169

Thickness (feet)
? ? .: 55_
54 137

*Publication .of this data is authorized by the Sun Oil Company, for whom the report' wa.s prepared on a commercial basis. -~

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

middle

Unit A _ ---~-------- _____,_ _____ _

.

BC _______:___:________.~ _ _____:.:_~_-_'_-.-:-_-~_-_-_--_--_-_~-_-_--__--_-_--_--

D-------------~-------------

Dept h {fee t)

Thiekneso (feef)

306

47

353

77

430

107

to

537 total 498

depth

Lithologic and paleontologic description of cut-

tings and cores. Samples are .cuttings unless

otherwise stated.

D epth l

Description

\

(feet)

Tertiary

Miocene(!). undifferentiated

20

Clay, tan, sandy, slightly micaceous;

Oligocene (!) undifferentiated

55

Limestone, chalky, water-worn, containing traces of fossils..

115
130
,.. j
169
' .
185 195 205
220

In Eocene

Upper Eocene.~ Ocala ~ill}estone. . Upper Member

,

..

j

: .

Limestone, light-cream, chalky, porous, composed of pooriy-pre-

lierved, fragmentary molds of. fossil shells,. among which, are

Lepidocy_clina sp., Gypsina globitla, bryozoan fraitilents, and

echi:noid sp~nes. ,



; ;' t '

..

Limestone, iron-stained, hard, chalky, water-worn, showing traces of fossil shells; among which are fragments of L epidocyclina sp=
U.p.per .Eocene. .. Ocala .Limestone. Lower_ Membe.r. - ~ ~ l . - .:~/.;;{ .

Limestone, white, chalky, porous, fossiliferous. Amo:rig the poorlypreserved molds, fragments of molds, and impressions of shells, are specimens .of L epidacyclina sp., Opercu.lina sp., worn frag- ments of . Asterocyclina (? )', A mphist egina pinarensis, Robulus sp., Amphistegina alabamensis, and specimens of a few other small Foraminifera (Ocala species).

Limestone, cream, hard, chalky. A few fragments of limestone
; contain traces -of sections of m-icrofossils. ' ' r \ ~

Limestone, chalky. A very small sample.

..

;.-'; Limestone, white, chalky, highly microfossiliferous, containing

many specimens of L epidocyclina ocala.na and varieties,.. a f~Yi

specimens of Operculina. sp., and many sp'ecimens of 4Jnphis-

t egina alabamensis that is common in the lower member ,Pf the

Ocala Limestone in western Florida.



Limestone, chalky, fossiliferous. Worn fragments of L epidocyclina sp. are cm1nnon, and specimeris of Amphis.tegina pind~ensis

.'-

.. -

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

125

Depth (feet)

Descjiption

270

.. ~ r .

are abundant. Also present are poorly-preserved specimens of

Camerimr, sp;, Operculimr, sp., Gypsina globula, and bryozoan

fragments._

,, ,.

. -~ i ,

_

Limestone, cream, chalky, fossiliferous. ,-The foraminiferal material consists of worn chalky molds. _The species seem to b~ the '

same as in the sample at 220 feet,-but :specimens of Camerimr,

sp. are much more abundant.

290

Limestone, ..white. and cream; hard, nod~lar,, containing abundant

, traces of fossils and a .few grains of_glauconite. The sample

contains fragments of a large coarsely beaded -Lep-idocyclina sp.

. ~

I

. This7s~mple' is p'ossibly the equivalent. of the Moody's Branch

Marl at the base of the Jackson (upper Eocene) Group in Missis-

sippi .

..:- . ~ ,J!'. - ~ ~- ) .: ~r:. . ..

'. .; ~~~ . :

''

- Middle Eocene ., ;) , '

.,

306

Unit A



' 1

. ) ,

Sandstone, clear quartz, very_ fine- grJ!,ined, somewhat glauconjtic,

'.
ais

chalky. The sandstone contains many calcitic fragments that

: seem' to be derived from b~oken fossil shells; one poorly-pre-

served chalky specimen 'of 'Lep-idocyclina sp.; and worn bryozoan

-. fragments.

.

.; .

.' .: Like sample at 306 ft.


..-~

.

327

Limestone, white, hard, so~ewhat ,glauconitic, c~ntaining . frag-

ments of sections of Operculinoides sp., Lepidocyclina (Poly-

lepidimr,) antillea, Pseudoph;iigmi?Ui sp. ..Aoout 50 percent of ., __J '., , . the sample is very uneven grained clea; quar~ sand. CaVings

of limestone from higher levels are common,
a4o- ..J} Sand, like sample at 327 ft:; and small fr~~e~-ts of white, hard,

slightly glauconitic chalk. The fauna seems to be like the ~ J ~ ' . sani.ple at 327 ft., but the specimens:are':too poorly presented
-< for specific identification. "' ' ;~; ,::- ''

"''" 353 -~ ~ Unit B

, ..

:'3

I .. '

Limestone, light~gray;' dense,' saridy (very'":fin-e grained sand),

glauconitic (very fine grained ghiuconit'e). The: grains of glau-

' conite are evenly distributed in the limestone.

370

. Like sample at 353 ft.



:.

315 ~,.~ , . Like sample at 353 ft.

400

' Limestone; light-gray, highly sandy, chalky. The sample contains

a trace of mica, fragments of Ostrea, sp. and - ~chinoids,' aiid a

m ... very few specimens of smaller Foraminifera, including Cibicides

.westi. ...,: . . ..

426 \ .430

Like sampn! at '400 ft. ; T

n -Unit C : .. :' .,,

,

ChaH~; - highly sandy, slightly glauconitic, containing many worn

fragments of a thin-shelled bivalve (Ostrea(?) sp.). Several

poorly-preserved specimens of small. Foraminifera also , occur,

Depth (feet)
435
438
445
458
468 . '
476 . '
48.6
490 '
495 500 '. 505
537
542
655
576 590 605

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

among which Asterigerina lisbone-nsis is the dominant form, and Globigerina sp., Cibicides sp., and others are also present.

Limestone, iron-stained, hard, glauconitic (moderately coarse

grained glauconite), sandy (moderately coarse-grained sand),

containing many fragments of a partly calcitized fossil bivalve.

The material has the appearance of having been weathered

during exposure at the surface.



Limestone, white, highly glauconitic (moderately coarse grained glauconite), sandy (moderately coarse grained sand), containing a t:race Of mica. Poorly-preserved fragments -of macrofossils are embedded in the limestone. About 50 percent of the sample is very uneven grained clear quartz sand.

Like sample at 438 ft.

Sand, chalky, coarse-grained, uneven, glauconitic, containing worn

fragments of fossil bivalves, and several chalky, glauconitic

specimens of Asterigerina lisbonensis .

!' .;

' :

Like sa~ple at 458 ft.

.,,

._ Sand, clear quartz, unev.en-grained, glauconitic; sand grains and angular to subangular~ Several specimens of small Foramini-

f era are present, among which Asterig erinrL lisbonensis is dominant, and Gyroidina soldanii var. octocamerat~ is fairly common.

The _sample also .contains a few ostracodes and echinoid spines.
Lime~'tone, 'white', hard, sandy, glauconitic, containing fragments

of molds of macrofossils.

.

.

. Sll.lld, clear q'uartz, ~~-derate]; coarse-grained, moderately e~en

grained, glauconitic, containing a few fragments of a thin. shelled Ostred (?) -sp., and a few ~halky fragments of . other

fossils.



~ike sample at 490 ft., but both sand .~nd glauconite are coarser

grained, and nodules of glauconite are abundant.

Sand, clear quartz, slightly glauconitic. The sand grains ar_e i_nod-

erately fine, moderately ev~n, an~tangular.



Like sample at 500 ft.

r ,,_

1 -" ~' . .-,

U~tD

3(.

Sand, pinkish-tan, clear quartz, very uneven grained, angular to subangular to rounded. Sample contains some glauconite . (prob_ably caving) and some fragments of pink clay.

Like sample at 537 ft.

Sand, pinkish-tan, clear qua1tz, moderately coarse, moderately even grained; a trace of colorless mica. The color of the sand is due to staining by the clay matrix.

Sand, light-tan. The sand is somewhat coarser than the sa~ple . at 555 .R!_and contains a few nodul~s of glaucl)~ite.

Like sample at 576 ft. '

No change. '

r
f
~~;' .. ~l':
:~
*t~-
.:~~.:-~;::. jjf .
I . ; . -' .
t !:
=-:~\~ :
:M
-~~--
":ff
_;;
;:

d l

-!4Jiil

LOGS OF SELECTED WELLS lN THE COASTAL PLAIN OF GEORGlA

127

Depth (feet)

Description

625

No change.

642

No change.

651

No change.

664

No change.

6~6

;) _ No change.

681
>.

No change.

697

Like preceding samples, but contains. almost no glauconite.

721 !

Like sample at 697 ft.

''

755

Like sample at 721 ft., but .contains no glauconite.

768

Like sample at 755 ft., but sand is coarser grained.

780

Like sample at 768 ft., but contains fragments of sandy .limestone

that are probably caving from higher levels.

-

820

No change.

909

No change.

925

No change.

940

Sand, like preceding samples, but finer grained, somewhat chalky,

and containing many nodules of glauconite. The sample contains

several poorlypreserved specimens of smaller Foramiili~era,

among which Robulus sp. (close to Lenticulina rotulata) is a

common form; no diagnostic species seem to be present. -

970

Sand, clear quartz, uneven grained, somewhat glauconitic, and

similar, in general, to sample at 940 ft. This sample also con-

tains a few specimens of nondiagnostic species of Foraminifera,

and a few other specimens which probably caved from higher

depths.

1035 T.D. Sand and a little glauconite like the sample at 970ft., but the sand is somewhat finer grained.

DECATUR COUNTY

Operator: Hunt Oil Co. Landowner: Metcalf Well 1
Location: Land District 21, Land Lot 260, center of NE lA, of Land Lot - 260

GGS. No. 168
Elevation: 104 ft. (derrick floor)
Total depth: 6152 ft. Completed: Aug. 19, 1944

/

Summary of Stratigraphy

Depth (feet)
Tertiary
Paleocene
In beds containing Tamesi fauna at 1930 ft. _____ ? 1st sample

Thickness (feet)
?

128

G~ORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth Thickneae

(feet)

' (feet)

Cretaceous

Gulf . Beds of Navarro age__________ ___ _ _. ____:_:__ 2050
Beds of Taylor age________ ____~------------------------------------ 2100 Beds of Austin age-----------------~------ 2480 Atkinson Formation, upper member____________________ ___ 2900
lower member_ ________:_~-- .3320 Comanche undifferentiated__________ __________________________ 3600 to

. 50 380 420 - 420
280

5250 ft.l

Lit~ologic . and paleontologic description of cuttings and cores. Samples are cuttings unless
otherwise stated.

Depth (feet)
0-1930

Description
Samples not studied.

In Pafeocene Series

, '

..1930-1940 .
. ~
1940-2020 : 2020-2030
2030-2040 2040-2050

Beds oontail'ling Tamesf fauna
...Clay, gray, marly, microfossiliferous; contains many speci~ens of Globigeri1ftl v elascoensis and Globorotalia velascoemis. Other specimens common in the sample are BulimiTUL exigua and Ala- bamina wilcoxensis.
Like sample at 1930-1940 ft.
Like sample at 1930-1940 ft.; contains specimens of Globorotalia velascoensis and G~ pseudomenadii, which are common in the typical Tamesi (Velasco) in Mexico.
Not described.
Clay, marly, but harder and less falky than the preceding samples; contains many typical specimen_s of Globorotalia v elascoensis.

.. ... . .

Cretaceous

.'

. ). .. ~

Gulf Series

'.
2050-2060
2060-2090

~eds of ;NavaiTo age
Marl, gray; _specimens of Globotruncana area, common. Not described.

Beds of Taylor age

2090-2100

Marl, gray, and a f ew fragments of fine-grained, chalky glauconitic sandstone. Sample contains specimens of Globorotalites ~' ..

lSamp!es not studied below 112110 ft.

\

LOGS OF SELECTI!1D WELLS IN THE COASTAL PLAIN 9_F GEORGI~

129

Depth (feet)
2100-2350 2350-2360
2360-2480

Description
conic~s, StensiOina ame_ricana, and a variety of Planulfna dumblei.
Not described. Mini, .gray, containing abundant specimens of Foraminifera; com~
mon species are: .Globotruncana spp., Globigeri1Ul oretacea, Pla~' ulina texana, and Stensioina americana. The sampl~ is probably from the low~r par~ of the beds of Taylor .age.
Not described.

2480-2490
249Q-2570 2570
2580-2590
2590-2600 2600-2790 2790-2800
2800-2830 2830-2840 2840-2900

Beds of Austin(?) age.

.-Marl, gray, containing a specimen of Valvulineria umbilicata typical of the Austin Chalk in Texas, and sp~cimenl! of Ps_eudogau- ' dryinella capitosa.

-Not described.

Sidewall core. Clay, greenish-gray, marly, micaceous, containing a microfauna
indicative of the Austin age ofthe beds.

Clay, gray and green, marly, containing specimens of -Kyphopyxa

ckristneri.



Clay, greenish-gray, shaly, calcareous. Not described. Shale, brown, thinly flaky, slightly speckled, and a little green,
flaky, noncalcareous shale. Not described. Shale, dark brownish-gray, flaky, slightly speckled: Not described.

-.~~ ~

2900-2910 2910-2920 2920-2930 2930-2940 ' 2940-2950
2950-2960 2960-2970 2975

. Atkinson Formation. Upper Member. -

Sandstone, moderately dense, very fine grained, highly micaceous, _, and fragments of speckled shale; a few shell fragments.
Like sample at 2900-2910 ft.; -the sandstone is somewhat glauco-nitic. -

Sandstone, like sample at 2900-2910 ft., and many fragments of Ostrea sp.

Not described.

Sandstone, similarto sample at 29-00-2910 ft,, but somewhat coarser

grained and more micaceous; contains a few black phosphatic fragments, a little bluish-green glauconite, nodules of pyrite,

and shell fragments.

Sandstone and abundant shell fragments, including fragments of

Inoceramus. -



Not described. Sidewall core. Sand, fine-grained, uneven-grained, angular, clear quartz, contain-
. ing a little_glauconite and a few shell fragments.

-~- .. - ~ -

i30

.GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

l

2970-3030

Sand, fine to .moderately fine grained, glauconitic, micaceous, containing shell fragments and fish bones. The various types of shale in the sample are probably cavings from higher levels.

3030-3040'

Sand, like samples at 2970-3030 ft., and a little .green flaky shale;

shell fragments are abundant.

. . ,

3040-3060 3060-3070

Not described. Sandstone, ~oderately coarse, glauconitic, fossiliferous; contains
fairly large fragments o.f carbonaceous material, many :>hell fragments, fish bones, a:r1d .a few bryozoan fragments. Below
this depth, the sandstone becomes harder and finer grained, ana shell fragments gradually decrease in abundance.

3070-3080

Not described.

3080-3090

Sandstone, white, dense, fine-grained, glauconitic, somewhat micaceous, containing phosphatic and carbonaceous material, shell fragments, and bryozoan fragments.

3090-3250

Not described.

3250-3260 Sand and shell fragments. Shell fragments are common.

3260'-3270

Not described.

3270-3280

Clay, green and bluish-green, shaly, and a little sand. SpeCimens of Foraminifera are probably cavings;

3280-3320

Not described.

3320-3330 3330-3390 3390-3400 3400-3420
3420-3430
3430-3440 3440-3510 3510-3520 3520-3530 3530-3540

Atkinson Formation. Lower Member. (electric log correlation)

Clay, green, shaly and sand and sandstone like sample at 3270-3280

ft

.

Shale, green, and other types of shale that seem to be cavings.

Shale, dark-gray, hard, is in cuttings at this depth.

Shale, dark-gray, micaceous, containing specimens of arenaceous species of Foraminifera typical of the lower member of the Atkinson Formation. The shale is the so-called "marine shale" of the Tuscaloosa Formation.

Shale, dark-gray, micaceous, containing specimez{s of Ammobacu-

lites bergquU1ti (abmida~t), A. contp?imatus, Trochamminii

ra.inwateri, T. exigua, and others.



Material and fauna like sample at 3420-3430 ft., but specimens of

Foraminifera more abundant.



Not described.

Shale, gray, and a little -green flaky shale; white, micaceous, glauconitic sandstone is also in cuttings at this depth.

Like sample at 3510-3520 ft.

Sandstone, white, fine-grain.ed, glauconitic, pyritic, somewhat micaceous, slightly phosphatic, increases in abundance. The sandstone contains a few large grains of quartz.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

131

Depth (feet)
3545
3555
3560-3570 3570-3580
3580-3590 3590-3600

Description

Sidewall core.
Shale, green, thinly flaky, speckled; contains dwarf specimens of Gumbelina and Globigerina that give the shale a speckled appearance.

Sidewall core. Sand, fine to coarse-grained, roughly angular, clear quartz; prob-
ably the basal sand of the Atkinson Formation.

Sand and sandstone, like the sample at 3510-3520 ft. and below.

' I

Sand, coarse-grained, is dominant in the sample; contains many greenish-yellow quartzitic grains, and a few grains of pink feldspar.

Sand, like sample at 3570-3580 ft.; ankerite pellets are common:

Sand, like sample at 3570-3580 ft., and a few chips.of dark brown-

ish-red micaceous shale.



J,

!;!,
1: '. .
l.?k_!. ." .
~-
~;:
.-::.-

3600-3610 3608 3623

3610-3900

3900-5240
.. 5240-5250

Comanche Series undifferentiated
Sand, coarse-grained, containing greenish-yellow and pink .grains, and a few grains of feldspar. The sample also contains cuttings of dark brownish-red, micaceous, sandy (fine-grained sand), unctuous, shaly clay.
Sidewall core. Sand, poorly sorted, fine to coarse-grained, roughly angular quartz,
containing a few greenish-yellow grain_s.
Sidewall core. Mudstone, brick-red, green and o.chre streaks and mottling, sandy
(fine-grained sand), micaceous. .
Samples not studied i'n detail. The material is, mainly, coarsegrained sand, and red, green and ochre mottled mudstone; grains of pink feldspar become progressively more abundant with depth.
Nodules of white, pink-stained, "sandy limestone are in the samples at 3900 feet. The samples were not stu<_lied in detail, but are composed, mainly, of coarse-grained sand, mudstone and shale, and nodules of. limestone.
Shale, -purplish-red, raspberry, and varicolored, and many nodules of white, pink-stained, sandy limestone. The samples were not studied below 5250 ft. At this depth, the samples indicate that the well had not penetrated rocks _older than Comanche age.

132

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 .

/

DECATUR COUNTY

Operator: D. E. Hughes Landowner: H_. W. Martin well 1 .
Location: Land District 15, Land Lot 189, center of southeast 40 acres of _S.E. lA, of Land Lot 189

GGS: No. 191 Elevation: 132 ft. (derrick
floor) Total depth : 3717 ft.
Completed: Dec. 5, 1947

Summary of Stratigraphy
Tertiary Not studied

Depth Thickness

(feet)

(feet)

Cretaceous

Gulf
-Beds of Navarro age_ ______ ____ _~------- 1670 Beds of Taylor age_____________________________________________ 1880? Beds of Austin age_ ______.:____ _____ __ _____ 2500? Atkinson Fo~mation, upper member_______:_______________ 2770
lower member..:.___ _________ 3190

.210? 620? 270 ?
420 260

Comanche undifferentiated ---- -------------- --------------------- - 3450 total 267 depth

Lithologic and paleontologic description of cuttings and cores. Samples are cuttings unless otherwise stated.

Depth (feet)
0-1670

Description
Samples not studied.

C-retaceous

Gulf Series

Beds of Navarro Age

1670~1680

Clay, gray, shaly, somewhat micaceous, irregularly arid weakly

:~

silty, containing a few specimens of Globotruncana area. The

sample also contains abundant cuttings of the- overlying white,

chalky, silty, glauconitic Clayton (Paleocene) Limestone, speci-

mens of Midway species of Foraminifera, and some species that

occur in the Tamesi (Paleocene) fauna. .....:
1680-1790 Materials and fauna like the sample at 1670-1680 ft. but shomng

gradual increase in the amount of gray shaly clay and speci-

mens of Cretaceous species of Foraminifera.
''..

\

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

t33

Depth (feet)
1790-1800
1800-1880 .

Description
Clay, shaly, fine to coarse-grained sand, and cavings of the Clayton (Paleocene) Limestone. The specimens of Cretaceous species of Foraminifera are mixed with Midway species that have caved from higher levels.
No change.

1880-2000
*
2000-2010
2010-2260 2260-2270 2270-2410 2410-2420
2420-2500

Beds of Taylor age

The top of the beds of Taylor age is placed.at 1880 ft. on the basis
of electric-log characteristics. The highest occurrence of speci-
mens of StensioinCL americCLna, a diagnostic Taylor species, is in
the sample at 1960-1970 ft. If the species occurred at a higher level, the specimens were obscured by the c~arse-grained sand that composes about 50-75 percent of the samples. Beginning with the sample at 1960-1970 ft., the ~and content diminishes gradually, and is small in the sample at 2000-2010 ft. .,

Small sample, composed of fine-grained sand, glauconite, and frag-

ments of gray shaly clay -containing Inocera.mus fragments, and . specimens of Stensiaina americana, .P~anulina dumb~ei, and

other species of Foraminifera.

'

No change.

Shale, gray, hard, hegl.ns to .show in this sample and increases in abundance with depth. as the sand content of the samples decreases. The microfauna ,indicates the Taylor age of the beds.

No change.

Clay, gray, shaly, also fine~grained .. sand, glauconite, and specimens of Foraminifera; includlng Pseudogaudryin ella capitosa that indicates the early Taylor ( ?) or late Austin ( ?) age of the beds.

. Not' described.

2500-2520 2520-2530
2530-2560 . 2560-2570 2570-2670 2670-2680 2680-2770

Beds of Austin age (electric log correlation)
Not described. . Clay, gray, shaly, fairly hard ; contains InocerCLmus fragments and
fragments of specimens of KyphopyxCL christneri (eat:lY Taylor ( ?) or late Au.stin ( ?) age). Not described. Highest occurrence of Citkarina texCLna (definite Austin age). Not described. Shale, gray, speckled, begins to show in the samples. Not described.

2770-2780

Atkinson Formation. Upper Member. Clay, gray, shaly, and a little speckled shale like samples at 2670-

13~

GE.ORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

2680 and below; in addition, many fragments of white, very fine grained, micaceous, slightly glauconitic sandstone, containing many fragment,s of Ostrea sp.

2784-2793

Core. Recovery? Top. Sandstone, gray, moderately soft, extremely fine grained,
highly micaceous and carbonaceous, weakly glauconitic. Middle. Like the top part of the core, but is less carbonaceous and contains thin streaks of greenish-gray shale. Bottom. Clay, gray, shaly, micaceous, sandy (medium-grained sand) ; contains glauconite, many phosphatic nodules, and a few shell fragments.

2780-2820 Cuttings not described.

2820-2830

Sandstone, white, very firie grained, somewhat glauconitic, micaceous, phosphatic; containing many fragments of Ostrea sp., is about 10-25 percent of the sample; a few fragments of greenishgray, soft flaky shale. Cuttings of gray shaly clay that are probably caving from higher depths, composed most of one sample; the specimens of Foraminifera in the sample do not seem to be indigenous to the material penetrated at this depth, but are probably cavings.

2830-2860 Like sample at 2820-2830 ft.

2860-2870

Sandstone, white, medium-grained, phosphatic, glauconitic, micaceous, calcareous, containing many fragments of Ostrea sp., is at least 25 percent of the sample. The upper member of the Atkinson Formatio~ seems to consist of clay, interbedded with Ostrea-bearing sandstone and relatively thin lenses of greenishgray shale.

2870-2940

No change.

2940-2950

Sand, fine to coarse-grained is at least 75 percent of the sample; fragments of white, fossiliferous sandstone, like sample at 28602870 ft.; a few fragments of carbonaceous material. Cuttings of gray shaly clay are probably cavings.

2950-3030 . 3030-3040

No change.
The coarse-grained sand composes a smaller part of the cuttings than in the sample at 2940-2950 ft., and the gray clay and fossiliferous sandstone are relatively more abundant.

3040-3060

Not described.

3060-3070

Sandstone, white, medium-grained, glauconitic, phosphatic contain-

ing abundant fragments of Ostrea sp., composes most of the

,'.

sample. Other constitutents are a little clay, fine to coarse-

grained sand, and a few fragments of grayish-green shale.

3080-3090

Clay fragments are dominant in the sample. Fragments of grayish-green shaly clay are more common here than in samples frot:n higher parts of the upper member of the Atkinson Formation.

3090-3110 Not described.

LOGS OF SELECTED WELLS. IN THE COASTAL PLAIN OF GEORGIA

135

.~ .

Depth (feet)

Description

3130
. ').

Sidewall core. Sandstone ' or siltstone, light greenish-gray, very fine grained, micaceous, glauconitic, carbonaceous.

3110-3170

Sample seemsr to be mostly cavings composed of sand and clay . from higher levels.

3178

Sidewall core. Siltstone, light-gray, soft, finely glauconitic.

3170-3190

Not described. . Atkinson Forma,tion. Lower Member

. 3190-3200

Shale, grayish-green, soft, flaky, somewhat micaceous and finely carbonaceous.

3200-3270

Samples are similar. to the one at 3190-3200 ft., and contain varying amounts of shale that caves from higher levels.

3270-3280

Shale, grayish-green, that is the principal constituent of the sample, contains minute specimens of Foraminifera.

3280-3290

This sample is the highest occurrence of specimens of :Ammooacu-

.i.,.._

,..lites advenus, a characteristic species of the lower member of

.the Atkinson Formation (Woodbine age).

3290-33?8 Not described.

3358-3364

Core: Recovery? Top: Sand, gray, soft, fine to medium-grained, argillaceous,' ~i
caceous, somewhat glauconitic.
Bottom. Sand, light-gray, fine-grained, argillaceous, micaceous,
glauconitic, containing fragments of carbonaceous material.

3370~3380

Shale, greenish-gray, flaky, containing a little fine-grained sand

and a few specimens of species of Foraminifera characteristic

of the lower Atkinson.

,~. . .

3380-3410

No ' change.

3410"3420

shale, like sample at 3370-3380 ft., but 50 percent of the sample

''

is fine to coarse-grained, roughly angular, etched quartz and

containing a little coarse-grained glauconite.

3420~3430 Not described.

, ;

.. .

3430-3440

Sandstone, fine to very coarse grained, containing a little glau-

conite and few phosphatic nodules. The washed sample is com-

posed, chiefly, of loose sand and cemented fragments of the

' sandstone.

~

:.,.

3440-3450 Not described.

Comanch~ Series uitdifferentiated

-~....

3450-3460

Sand, fine to coarse-grained, roughly angular,. clear quartz, and a

~- :~

, tr

little feldspar ; some simd grains are yellow and pink-tinted.

3460-3470

No change.

Sand, like sample at 3450-3460 ft., and a few small fragments of brownish-red, gray and green mottled, slightly micaceous shale.

3480-3'7.17 T :D: The samples were not studied in detail :and are composed, mainly,

. '

of sand like .the immediately preceding samples, and sparse frag-

ments of red and mi.llti-colored shale. The samples do not sug-

gest that the well penetrated beds older than Comanche.

136

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

/

EARLY COUNTY

Operator: Mont Warren et al Landowner: A. C; Chandler well 1 Location: Land District 26, Land Lot
406, 250 ft. north and 968 ft. west of southeast corner of north one-third of Land Lot406

G.G.S. No. i21

:.,..

Elevation: 187ft. (derrick

floor) ..

.

Total depth: 7320 ft.

Completed: Oct. 2, 1943

Summary of Stratigraphy

.

~

Tertiary

Depth Thickness

(feet)

(feet)

Not" studieq

;j.
,,

Cretaceous '.

Gulf

Beds of Navarro age ----------------------~--~----------------.:.. 1200:
Beds of Taylor age _____________.:_________:__________~______c_~--- 1358

Beds of Austin age---------------------------------~-----~---- 1830 . Atkinson Formation, upper member_________________~:__ 2395

lower member____________________ 2915l '

Comanche undifferentiated -----------~---:~------~~~-~----- 2915

'

~140

,.158 472 565 520 225
2530(?)

or

r .....

<-

.

Upper Triassic (?)

Triassic(?) c

Newark ( ?) Group ---------------------------------------------~ 5670 ( ?)

?637( ?), '
930( ?)

. I
,,
.~

or'~

' '

,. ' ~ . . ,5777(?)

Devonian (?) :!1

. or 823 ( ?)

Mi~dle Devonian (?) Weathered ( ?) sh~l~ _________' 6600

". .. ~

.l. '

~~

,. , ,

I

.

'..

.

181

~ -... _,,

::Devonian ~ -

.. .,.

Middle Devonian1 Black shale -------------------------~------ 6781

459

'

Ordovician (?)

\).~ ..........

I

Lower Ordovician(?)

White

sandstone

_________.'.____:_

7240



t

to otal

',,

80

;

depth ,

. .

. (

.

~ :

1

Sbwlaacrktzs, hFal. ~

M., as

1"949, Journal of ' Pale<iritolo~y, v . 23, no. ' 3, p.
"Late Ordovician or Early Silurian in age."

320,

questionably .

classlfied ' t!ie

Bridge, Josiah, and Berdan, J. M., 1961;. U.S. Geologi ~al Survey open-tile report, p. 7/ table- I,

and map, tentatively classifi'ed the black shale as "Silurian or Upper Ordovician"/ and the underlyin~ white sandstone as lithologically similar to rocks in wells in Florida which they

had classified as Lower Ordovician.







R. J. M. Berdan (written communication to E. Applin; 1959) stated that on t he basis of

spores, J. M. Schopf, U .S: Geological Survey, claasified the black shale as not older than

Middle Devonian.



'



' '

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

137

Lithologic and paleontologic description of cores

and cuttings.



Samples are cuttings unless otherwise stated.

D,;pth (feet)
0-1510

Description
Samples not studied.

1200 .

Cretaceous
Gulf Seri~s
Beds of Navarro age.
Top of Cretaceous by Southeastern Geological Society Mesozoic Committee, 1949, Mesozoic cross section E-E, Bullock C?unty, Alabama to Franklin County, Florida.

Beds of Taylor age

' 1358 .

Top of beds of Taylor age on the basis of the highest occurrence of StensiOina americana.

1510-1525 Marl, dark gray; cream, hard, sandy limestone (fine-grained ! , sand); fine to coarse-gi'airied sand. . Cuttin:gs contain specimens.

of Planulina dumblei and other Taylor species.

1525~1540

Sample composed, mainly, o{ fragihe"Itts of sand~to'ne, sandy lime-

, _ stone, and gray marl; unconsolidated sand; a uttle glaticonite.

,, : . ,,.. Specimens of several species:Of Foraminifera indicate the Taylor

: .~ :. ... :1: age of the heds; a few specimens from .higher levels also occur.

ft: 1540-1591 . Like sample 'at 1525-1540

. ,

. .:

. .,

\. ' .

. . . ..

:

l. li

1591-1606' """Shale, gray; marly, highly microfossiliferous and fragments of

'

light-gray, hard, sandy iimestone. Specimens--of-several species

., : .

-~: .. '!"' : of Foraminifera that indicate the Taylor age_of the beds; frag~

_:._.~ ... . ments of inoceramus and Ostrea sp.; specimens of Foraminifera

, , fr~m higher levels. :.,.;:. . , . , .' ~

1606-1787 1787-1804
" ...;.' t
1804-~830

Like sample- at 1591-1606ft. .

~

Like sample at 1591-1606 ft., but contains specimei).~;J of Kyphopyxa.

christneri and Pseudogaudryinella capitosa that are common in

the lower part of. the bed.s of Taylor ag~.



1~. : :

.

.

. ' . -. '

' , . .

... : Li~e sample at 1787-1804 ft .

.tJ, .;~ - .
Beds of Austin age (electric log correlation)

1830-1847 1847-1865
. 1865-1905

Like sample at 1787-1804 ft.

Like sample at 1787-1804 ft., but contains fragments of light .greenish-gray m3:rly shale. Coarse sand that ~composes part of

the sample is probably caving, .._

-~ 1

Like sample at 1847-1865 ft.

-'

/

138

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

. Description ,

1905-1935

Sandstone, gray, hard, very fine . grained, calcareous; fine to coarse-grained unconsolidated sand; many Inoceramus frag-
a ments; a little dark-gray marly shale. The microfauna is mix-
ture of specimens of species from various levels, but includes specimens of species that are common only in the lower part of the beds of Taylor age and the upper part of the beds of Austin age.

1935-1940

No sample.

1940-1955

Shale, gray, marly, slightly micaceous, and some sand and other materials like sample at 1905-1935. The microfauna contains specimens of Darbyella brownstownensis, Kyphopyxa christneri, and Gattdryina ellisorae. D. brownstownensis is common in the upper part of the beds of Austin age, and the accompanying species are common only in the lower part of the beds of Taylor age and the upper part of the beds of Austin age.

1955-1961

Like sample at 1940-1955 ft.

1961-1977

This sample contains the highest occurrence of spechnens of Globo. r.otalites umbilicatus, a form typical of the beds of Austin age.

1997-2000 2000-2015

Like sample at 1940-1955 ft.

This sample. cont~ins the highest occurrence of specimens of

. Citharina tcxana.



2015-2153

Like sample at 1940-1955 ft.

,,

2153"2168

. Sand; fine-grained; small fragments of gray' marly shale; abundant Inoceramus fragments ... The foraminiferal fauna is a mixture from various levels, as in .all the foregoing samples, but contains specimens of species typical of the beds of Austin age, Hastigerinella wat~rsi, Dorothia alexanderi an:d others.

2168-2230, , Like sample at 2153-2168 ft.

2230-2245 Shale, gray, calcareous, and fragments of dark brownish-gray, ' somewhat light-speckled, flaky, slightly carbonaceous shale. Abundant Inocera-mus fragments and . specimens of Foraminifera are seemingly caving from various depths;,;

2245-2260

No sample.

2260-2275

Shale, gray, slightly calcareous, somewhat mica<;eous. The fauna

is composed of Inoceramus fragments and fairly numerous speci-

mens of Foraminifera from higher levels. Small specimens of

sp. Globigerind sp. and Gumbelina

are the dominant forms;

Globotruncana sp., Planulina cf. P. ea.glefordensis, and Globoro-

talites umbilicatus are fairly common.

2275-2364

Like sample at 2260-2275 ft.

2364-2380

Similar to sample at 2260-2275 ft., but with the addition of many fragments of dark brownish-gray, light speckled, marly shale.; no marked change in fauna.

2380-2395

Like sample at 2364-2380 ft. .

LoGS OF SELECTED WELLS IN THE "COASTAL PLAIN OF GEORGIA

139

Depth (feet)
... ,

Description
Atkinson Formation. Upper Member.

2395-2411

The upper. member of ~he Atkinson Formation in this _well is a

,.

shallow-water marine facies. _Like sample at 2364-2380 ft., but with the addition of a few _ft:agments of very fine grained, cal-

.-.

careous, micaceous, slightly glauconitic and phosphatic sandstone.

?

2411-2439

Like sample at 2395-2411 ft.

2439-2454

Like sample at 2395-2411 ft. but contains many fragments of the very fine grained sandstone, and a few fragments of light-gray, hard, micaceous, sandy (very fine grained sand) limestpne.

2454-2481

Like sample at 2439-2454 ft., with the addition of many fragments of light-gray, moderately fine-grained, glauconitic, somewhat phosphatic sandstone containing many fragment_s of Ostrea sp.

2481-2495

Like sample at 2454-2481 ft., but this sample shows an increase in the fragments of the light-gray, fossiliferous' sandstone.

2495-2510

Sandstone, light-gray, moderately fine to moderately coarse grained, clear quartz, containing glauconite, phosphatic material,_and abundant fragments of Ostrea-like bivalves and bryozoan fragments.

2510-2525

Like sample at 2495-2510 ft. This sample is the highest occurrence of fragments of thinly flaky grayish-gre_en shale.

2525-2540

Sand, unconsolidated, fine to moderately coarse grained, angular

to subangular, quartz; fragnients of the fossiliferous sandstone

. first observed in the sample at 2495-25;1.0 ft.; and a few frag-

me~ts of flaky grayish-green shale.



2540-2555,

Sand, unconsolidated, fine to coarse-grained,__quartz; many frag-
ments of white, glauconitic, phosphatic sandstone containing
bryozoan and shell fragments; a little grayish-green, flaky, unct~ous, slightly _carbonaceous _shale.

2555-2565

No sample.

2565-2590 Like sample at 2540-2555 ft." . >.

2590-2605

Sand, unconsolidated, fine to very coarse grained, clear quartz;

fragments of fossiliferous sandstone and shells (Ostrea sp.)

'

like sample at 2540-2555 ft., but . much .less abundant; increase

in .fragments of grayish-green shale .

2605-2628 ''

Sand, unconsolidated, like sample at 2590-2605 ft.; fragments of Ostrea sp., phosphatic nodules, and fossiliferous sandstone;
fragments of green shale slightly more common than in sample
at 2590-2605 ft. Specimens of Valvulineria infrequens fairly common; Planulina, eaglefordensis and Gumbelina m.oremani also present. This sample seems to indicate a brief change to a .deeper-water marine environment..

2628-2658

Sand, unconsolidated, like sample at 2605-2628 ft.; fossiliferous

sandstone; fragments of Ostrea sp.~ flaky green shale, and

phosphatic nodules.



I

140

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
2658-2668 2668-2688
2688-2703 2703-2730 2730-2748 2748-2825 2825-2840
2840-2855
2855-2870
2915-2934
1.
2934-2949
2949-2962 2962-2978 2978-2993

Description

Sample almost entirely unconsolidated, fine to moderately coarsegrained quartz sand.

Simd, unconsolidated, fine -to very coarse grained; white; slightly glauconitic, phosphatic, calcareous sandstone, containing embedded fragments of Ostrea sp.; grayish-green, flaky, carbonaceous shale.

Sample, mainly, unconsolidated :fine to moderately fine-grained sand; a few :fragments of other material like sample 'at. 26682688 ft.

Like sample at 2688-2703 ft.

Sand, like sample at 2688-2703 :ft.; fragments of fossiliferous sandstone and Ostrea sp. common; a few fragments of flaky, grayish-green shale; much caved material from higher levels.

No change.

Sand, unconsolidated, fine to moderately :fine grained, quartz; abundant fragments of an Ostrea-like bivalve. . F ossils apparently wash from a fine-grained, somewhat glimconitic, phosphatic, calcareous sandstone. The well may have penetrated a shell reef at this depth.

Like sample at 2825-2840 ft., and in addition, a few fragffients of

. yellowish-brown and light bluish-green mottled shale, and red-

dish-brown shale. A few of the fossiliferoussandstone-fragments

are carbonaceous. ,

, ..

,.

Sand, unconsolidated; fine to moderately .fine grained; many {ragments of 6strea sp., and a few fragments of 'white, fine-grained; fossiliferous sandstone; .manY cavings from higher levels:

Like. sample at 2855-2870 ft.; fragmentsof -grayish-green s"hale

are more c' ommon,

'

: ~ I

Atkinson Formatio!L ' Low~r Meinber:

. ~- I:W I .

.'".:

Like sample at 2870-2915 ft., but fragments of hard, very fine grained,-calcareous, somewhat glauconitic, 'phosphatic, m_ic!lceous sandstone. are fairly common. ~ l,~

Like sample at 2915-2934. ft., b'ut fragments of sandstone. are more common, and some of them contain embedded shell debris. Sample contains many fragments of grayish-green shale, and a few fragmenj;s of grayish-green shale, and a few fragments of flaky, somewhat micaceous, ca~bonaceous shale.

. Sand; unconsolidated, fine to coarse-grained, and abundant fragments of gray and. grayish-green, flaky shale. .

Like sample at 2947-2962 ft., and a few fragments of very highly micaceous, slightly carbonaceous, fine-grained sandstone.

Shale, dark brownish-gray, flaky, micaceous, slightly carbonaceous, and a little~ grayish-green shale; a little highly micaceous sand-
stone like the sample at 2962-2978 ft.; fragments of Ostrea sp.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

141

Depth (feet)

Description

2993-3007
. ~ ~~. 3007-3022

Like the sample at 2978-2993 ft.; contains a fragment of thehighly

micaceous sandstone that shows embedded fragments of grayish-

green shale, and a. fragment of a specimen of an arenaceous

species of Foraminife!a:

... '

Shale, dark-gray, flaky, mic~ceous; grayish-green shale; a litt;le

sand and a few fragm~nts of micaceous sandstone. The sample

contains sp~cimens of .Ammobaculit es com-Primatus and Trocha:m-

mina rainwateri.2

..

3022-3037 3037-3052
. I~

Like the sample at 3007-3022. The microfauna is composed of

specimens of Ammobaculites compri'l'iUitus, A. bergquisti, A:

... agrestis, 'A. adv erius.

.

.

.

.Like sample at 3007-3022 ft. The mfcrofa~ma is composed of

specimens of Ammobaculites 'bergquisti, A : agrestis, A. cf. A . fragmentarious, Ammobaculoides plu1nmerae; Ammotium brau~

.steini, and fragments of Polyphragma sp. .

3052-3067
,. ' l


Shale, gray and greenish-gray, flaky; a little fine-grained mica-
ceous sandstone; a little unconsolidated sand. The microfauna is composed of specimens of Ammobaculites bergqu1sti, A. . . junceus; A ~ agrestis.

3067-3o82

. Like sample at 3052-3067 ft., and cavings bf several kinds of niaterial from higher levels; unconsolidated sand composes about 60 percent of the sample .. Fragments of 'light-gray, silty, pqssibly nodular limestone are fairly common.

3082-3097
3097-3112 ;,'?-
3l12-3127 3127-3142
...:..'

,, Shale; gray, soft, flaky, and many fragments of white to light-gray;

fine-grained, calcareous, micaceous, sandstone and siltstone; a

..islittle silty, micaceous limestone. About 25 percent of the sample unco~solidated fine to 'coinse-grained ,quartz sand;

Sand: unconsolldat~d, fi.ne to .~oderatel~ ~coarse grained, roughly

' ang~ilar, qu~rtz i many. nodules of dark~green glauconite and of

pyrite.

. .,.. .. ..-.-

.



l ..

1.~ I t ' ,. t. '

~

.~ . . .

,

of Sand, ' unconsolidated, .''~ine " to coarse-grained; roughly ' angular quartz; fragi}i.eb.ts of .sev~:fal kinds micRceous sandstone and

siltstone.

. ~ )'

.., '" ... ' : ,.,

Sand, like sample at.3112-3127 ft. Sample -~htains a few nodul~~

of siderite, large flakes of colorless an'd pate.:green micA; and a

trace of glauconite. '

'

. , Comanche Series undifferentiated

,I'"'

.-, .. (electric log correlati~m) ,

3142-3157

Like sa~ple ~t' 3't27-3142 ft., btit cont~i~s no n~dtiles of siderite.

3157-3172 .
;,

Sand, unconsolidated: fine to coarse-grained, roughly angular
quartz; a few greeh-tinted grail'is; a few large flakes of mica. Phosphate nodules and shell fr~jpnents are probably caving.
,.

'Sampiee f~~in 3007 to. 3067 feet contain ~peeimens of species of Foraminifera characteristc of t he so-called " Barlow" fauna described by E. R.. Applin, 1955, U.S. Geological Survey Prof. Paper 264-1, p. 187-197, pis. 48 a nd 49 .

142

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

/

Depth (feet) 3172~3182
3182-3197 3197-3212
3212-3227 3227-3242 3242-3298 3298-3314
3in4-33.29 3329-3408 3408-3423 '
3423-3438 3438-3453 3453-3469 3469-3484
. 3484-3499 - -.~ :
3499-3514
3514-3530 3530-3545 3445-3639 3639-3747
3747-3762 . '
~:
3762-3803

Description

No sample.
Like sample at 3157-3172 ft.
Sand, unconsolidated, fine to very coarse grained, roughly angular quartz; fragments of red and gray mottled shale and purplishted, silty clay shale; a few siderite nodules.

Sand, unconsolidated, fine to very coarse 'grained, containing grains of feldspar; a little varicolored shale. .

Like the sample at 3212-3227 ft. A few siderite nodules present.
;_
No change.
Sand, unconsolidated, fi~~ to .very coarse grained, quartz; very
coarse grains of quartz and grains of feldspar are common; a few small fragments of multi~colored clay 'shale are present.

No change.

Sand, like sample at 3298-3314 ft.;-b_ut no shale .present.

Sand, unconsolidated, coarse-grained, roughly angular. The color of the sand in the samples from 3329 to 34~3 ft. changes progressively with depth from white to _pink because of the steady increase of pink and yellow-tinted grains of feldspar and quartz.

Sand, like sample at 3408-3423 ft.-, but no shale; ._grains. of pink feldspar very common.

Sand, like sample at. 3408-3423 ft.; a few nodules of pink sandy limestone; feldspar grains abundant.

Sand, like sample at 3408-3423 ft., and a few fragments of dark brownish-red and bluish-gray mottled clay shale.

Sand, unconsolidated, fine to moderately fine, :roughly angular quartz; a few coarse grains present; feldspar common.

Sand, like sample at 3469-3484 ft., and a few fragments of sandy,

mustard-colored clay shale.
' ,.: .
Sand, l~e sample at 3469-3484 ft., but coarse grains again com-

mon; many fragments of dark-brown a'nd purplish-red and gray

mottled, micaceous clay shale. . .

.

No sampl~s. Sand, unconsolidated, fine to coar~e-grained, , quartz; coarse grains
rare; a little feldspar and a few -fragments of m]llticolored shale.

No change.

Sand, unconsolidated, fine to coarse-grained; a little feldspar and a few fragments of dark-red and bluish-gray mottled, micaceous
, , shale. No shale in sample at 3~69-3685 ft.

Sand and a little mottled shale like the samples from 3639 to 3747 ft.; a few fragments of flaky, purplish-gray, slightly sandy, ~icaceous shale.

Sand, unconsolidated, fine to coarse-grained, quartz; a little feldspar; a few fragments of brownish-red and .gray mot~led _ shale;
a little purplish-gray shale.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

143

Depth (feet)

Description

3803-3807 No sample.

3807-3867 Sand like the samples from 3762-3803 ft.; ft:agments of red, gray

.1

and mustard-colored shale more common.

3867-3967

Sand and a . little multicolored shale like the samples from 3807~ 3867 ft.

;.

3967-3978

Sand like the samples from 3867-3967 ft., and many fragments of

brownish-red and gray mottled micaceous shale; a few fragments

I'

of bluish-green shale; a few fragments of red, gray, and mus-

tard-colored mottled shale.

3978-3994

Shale, dark brownish-red, grayish-green mottled, highly micaceous;

.

a few nodules of pink sandy limestone,

3994-4009

Shale, like the sample at 3978-3994 ft., 50 percent; unconsolidated sand 50 percent.

4009-4024

Sand, unconsolidated, fine to coarse-grained, roughly angular,

~:

. quartz, and a little feldspar about 75 percent; multicolQred shale

fragments about 25 percent.

. .

4024-4083

Sand and multicolored shale like the sample at 4009-4024 ;ft.; the

amount of shale in the samples ranges from about 25 to '50 per-

. cent.

4083-4098

Sand, unconsolidated, fine to coarse-grained, 50 percent; 50 percent small fragments of red and gray mottled shale, and many large nodules of dark-green glauconite ( ?) or chlorite ( ?) that seem to come in at about this level.

4098-4115

Like the sample at 4083-4093 ft.; some sand grains are stained green, possibly from the glauconite(?) or chlorite(?).

4115-4176

Sand, unconsolidated, fine to coarse-grained; glauconite ( ?) or chlorite (?) , and many green-tinted grains of sand; phosphatized fish remains and other phosphatic fragments; a little multicolored shale.

4176-4207

Sand, unconsolidated, and nodules of glauconite(?) or chlorite(?) like samples at 4115-4176 ft., fragments of red and gray mottled shale fairly common; fragments of red, hard (nodular?), sandy (very fine grained sand) limestone.

4207-4237

Sand, unconsolidated, fine to coarse-grained, quartz, containi~g many green-tinted grains, is about 75 percent of sample. Large nodules of dark-green glauconite ( ?) or chlorite ( ?) , a little red and gray mottled clay, and a few phosphatic nodules, compose about .25 percent of sample.

4237-4297

Sand and glauconite ( ?) or chlorite ( ?) like sample at 4207-4237 ft., shale fragments, and a few fragments of red nodular limestone.

4297-4327

Sand like sample at 4237-4297 ft.; glauconite(?) less common; shale fragments rare; no red nodular limestone.

4327-4342

Sand and glauconite(?) like sample at 4297-4327 ft.; a few fragments of red shale and a few of dull-red nodular limestone.

lc
'..'"

144
Depth (feet)
4342-4357 4357-4372 4372-4391
4391-4422
4422-4437
4437-4452 4452-4483 4483-4498
4498-4528
4528-4559
4569-463.4 4634-4669 4669-4684 4684-6088 5088-6106 5106-5135 5135-5168 5168-5205 5205-5309
5309-5325

;
GEORGIA GEOLOGICAL SURVEY BuLLETIN 74

Description

Sand like the sample at 4327-4342 ft.; a little shale and no limestone; glauconite(?) and green-tinted sand grains less common.

Like sample at 4342-4357 ft,; a few small nodules of red limestone.

Sand, unconsolidated; glauconite(?); numerous fragments of red and gray mottled, micaceous, sandy clay shale; a few nodules of red l~mestone.

a Sand, unconsolidated, fine to moderately coarse-grained, quartz; a .little feldspar, but no green-tinted grains; little glauconite ( ?) ' possibly caving, and a little red shale.

Sand, unconsolidated, fine to coarse grained, quartz; numerous fragments of red and gray mottled micaceous clay shale; a few nodules of red limestone. .

Sand, fine to coarse-grained, quartz.
Sand, like sample at 4437~4452 ft.; many fragments of red and .: gray mottled micaceous shale. Limestone, h'ard, cream, dense, containing a trace ~f glauconite
and a few small specimens of Ostracodes; a few large fragments of chert; a little gray clay shale.
(Note: This sample is definitely out of place.)
Sand, unconsolidated, fine to coarse-grained, quartz, and a llttie
feldspar, about 80 percent of sample; small fragments of red
shale, about 20 percent.

Sand, unconsolidated, fine to very coarse grained, containing many

large deep-yellow-tinted grains; a little dull~red and gray mottled

shale: .



. Sand, like sample at 4528-4659 ft.

Sand, unconsolidated, fine to coarse-grained; fragments of red - and gray mottled micaceous shale common.

Like sample at 4634-4669 ft., a little glauconite ( ?) which may be caving.

No change.

Sand, unconsolidated, fine to coars~; green-tinted grains common; a little dark purplish-red clay shale.

No samples.

Sand, like sample at 5088-5106, a little red .shale, and cavings
from higher levels.
No change. The samples questionably show the materi~l pene-
trated by the drill at this level.

Sand, unconsolidated, fine to coarse-grained quartz, containing green-tinted grains, a few pink and yellow-tinted grains, and a little feldspar; fragments of dark, .dull-red and gray mottled, micaceous; somewhat sandy clay shale, and sparce nodules of red and- gray silty limestone; cavings of gray marl and other material . from much higher _levels.

Sand like samples at 5205-5309 ft., but coarse grains are rare; a

-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

145

Depth (feet)

Description

I

5325-5340 5340-5354

little purplish-red, gray, green-mottled shale; many cavings. No samples. Sand, unconsolidated, fine to coarse-graine-d; a little red shale;

r
f' .

5354-5369 .

purplish-red and purplish-gray, highly sandy, micaceous shale; a little very fine grained highly micaceous sandstone.
Sand like sample at 5340-5354 ft.; fragments of purplish-red and

!:

gray clay; green, highly sandy, micaceous clay fairly common;

a few nodules of red and white limestone.

5369-5452 No change.

5452-5541

Sand, like sample 5340-5354 ft., and many fragments of dark purplish-red, and gray; highly micaceous, sandy shale; several fragments . of bright-yellow, highly micaceous, sandy shale; ~ few nodules of limestone. '

5541-5677 Mainly" sand and a small amount of shale.

5672-5692

Sand, unconsolidated, fine to coarse-grained, quartz, containing many green-tinted grains; a little glauconite (caving?) 1 a little red micaceous shale; a few nodules of red limestone

5692-5727

No change.

5727-5777

No samples.

5777-5792
5792-580.7
5807-6007 6007-6023 6023-6038

Triassic(?)
Upper Triassic(?) Series
Newark(?) Group
Sand, unconsolidated, :fine to coarse-grained quartz; a few fragments of dark-red shale; a few fragments of light bluish-green shale, some of which are highly silty and micaceous.
Sand unconsolidated, fine to coarse-grained;- red and light-green shale like the sample at 5777-5792 ft.; a few nodules of red and white sandy limestone.
No change. No samples. Core 1. Recovery 8 ft.
Top. Sandstone, light greenish-gray and pink, thinly laminated, very fine to moderately fine grained, argillaceous, highly micaceous (black and green flakes). The sand grains are usually . etched and roughly angular. Part of the sandstone has a white ashy(?) cement. Three feet from the top of the core, a streak of white soft sandstone is fine to very coarse grained and con~ tains small pebbles, the cementing material is white and ashy(?). Middle. Sandstone, light green, very fine-grained, micaceous. Bottom. Sandstone, light-green, fine to moderately coarse grained, micaceous, bentonitic. The sand grains are usuillly etched and roughly angular.

l46
Depth (feet)
6024-6039
6039-6190
6190-6222
6222-6600

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

'

Description
Sand, unconsolidated, fine to moderately coarse grained, and a few fragments of red shale.
Like the sample at 6024-6039 ft., with the addition of a few nodules of pink to red limestone.
Sand, unconsolidated, fine to moderately fine grained; a few coarse sand grains and a few fragments of red and gray mottled shale'
Sand, unconsolidated, fine to coarse-grained, quartz, and a little feldspar; many small fragments of dull, dark-red and gray mottled micaceous shale; a few nodules of red and pink limestone.

6600-6607
6600-6615 6615-6631 . 6631-6646 6646-6682 6682-6697 6697-6707 6707-6722

Devonian (?)

Middle Devonian (?). Weathered (?) Shale.

Core 2. Recovery 3 ft. Corrected depth 6630~6637 ft. Top. Shale, dull brick-red, sandy. The sand, which is fine to moderately fine grained quartz, constitutes about 10 percent of the fragment of core, and is rather evenly distributed. The .shale contains a small amount of mica, a few small inclusions of greenish-yellow unctuous clay, and molds and impressi.ons of small fossil bivalves.

Middle. Shale, dark reddish-brown and bright greenish-bluestreaked, micaceous, somewhat silty, containing yellowish-brown inclusions.

Bottom. Shale, greenish-blue and dull reddish-brown, silty,

. splintery.



Sand, unconsolidated, fine to coarse-grained, and fragments of the shale like core 2 at 6600-6607 ft. The sample contains one large fragment of white quartzite, and one of red-stained quartzite.

Sand, unconsolidated; fine to coarse-grained (probably caving), and fragments of several types of shale, including fragments of smooth, splintery, flaky, reddish-bro'Yn and yellowish-greenstreaked shale.

Like the sample at 6615-6631 ft and a few fragments of multicolored limestone nodules, that seem to belong nea~ this depth.

Sand, like sample at 6615-6631 ft., and fragments of several types
of multicolored shale and a few nodules of multicolored limestone.
Sand and shale fragments like sample at 6646-6682 ft. , ~nd in
addition, a few fragments of .bright greenish-blue bentonitjc_( ?) shale, and of red and gree~ish-gray, yellow-speckled, very fine grained sandstone.

Sand and fragments of sevel'al types of red, brown and blue shale.

Sand; unconsolidated, about 50 percent of sample, in contrast to 75-90 percent in samples about 100 feet higher in this well; the . sand is probably caving from higher levels. The sample contains various types of multicolored shale and many fl'agments of

LOGS OF SELECTED WELLS iN THE COASTAL PLAIN OF GEORGIA

147

Depth (feet)
6722-6737 6737-6766 6766-6781

Description
dark r eddish-brown and greenish-blue-streaked shale which was not observed in samples from higher levels; the shale contains traces of impressions of small fossils.
Like sample at 6707-6722 ft., and in addition, a few fragments of. bright bluish-green, micaceous siltstone.
Sand, shale, and siltstone like sample at 6722-6737 ft. Fragments of brownish-red and greenish-blue-streaked shale, green siltstone, and bright blue-green bentonitic(?) shale are common in the
sample.
Sand, unconsolidated, about 75 percent of sample. About 25 percent of sample is composed of fragments of several types of multicolored shale, green siltstone, and a f ew nodules of limestone. A fragment of black shale, which was not observed in -. samples from higher levels, is probably from near' this depth.

6781-6842 6842-6872 6863-6873 6872-6888 6888-6948 6948-6965 6965-6985
6985-7006 7006-7009 7009-7024 7024-7039

Devonian

Middle Devonian. Black Sha~e.

,_

Like sample at 6766-6781 ft.; increase infragments of black shale.
Like sample at 6781-6842. Fragments of dark reddish-brown, smooth, splintery shale, very common; a little black shale.
Core 3. Recovery 0. Corrected depth 6893-6903 ft.
Sand, unconsolidated, and multicolored shale like sample at 67666781 ft. Fragments of bluish-green shale abundant; dark brownish-red shale common; a few fragments of black, waxy shale.
Like sample at 6872-6888 ft. A few fragments of black shale: a) smooth, flaky, splintery shale; b) rough-textured, mica-
ceous shale having a conchoidal fractur'e.
Shale, mainly brownish-red, reddish-brown and green, and a little black shale.
Core 4. Recovery 20 ft: Corrected depth 6995-7015 ft. Top. Shale, dark-gray, smo'oth, thinly laminated, somewhat silty; in part, highly micaceous and highly pyritic (small crys-
f tals); small particles of carbonaceous material. Another part of the core is dark-gray, hard, laminated, micaceous siltstone, containing minute particles of carbonaceous material. Middle. Shale, dark-gray, laminated, containing minute particles of carbonaceous material, and a few specimens of Lingula sp. Bottom. Like the middle part of the core.
Core 5. Recovery 20 ft. Corrected depth 7015-7036 ft. Black shale containing specimens of Lingula sp.

' No sample. Sand, unconsolidated; multicolored shale, and black shale like core 4 (6965-6985 ft.) and core 5 (6985-7006 ft.)
Like sample at 7009-7024 ft.; fragments of black shale more abundant.

148
Depth (feet)
7039-7221 7221-7251

GEORGIA GEOLOGICAL S URVEY BULLETIN 74
Description
No change. .Samples contain much caved material. Sand, unconsolidated; fragments of multicolored shale, and black
shale; a _little light-tan; dense, finegrained sandstone.

Ordovician

7240

Lower . Ordovician(?). Quartzitic san~stone. (electric log correlation) .,_

7251-7284 Like sample at 7221-7251 ft. Some fragments of the standstone are moderately coarse grained, and a few fragments seem to be quartzitic.
7284-7320 T.D. No samples.

ECHOLS COUNTY

Operator: Hunt Oil Company
Landowner: Superior Pine Products Co. Well .#3
Location: Land District 13, Land Lot 532; 218 ft. east and 242 ft. north of southwest corner of Land Lot 532.

GGS No. 150

Elevation: 144 ft. (derrick

floor)



Total depth : 4003 ft. Completed: July 29, 1947

Summary of Stratigraphy

Tertiary

Dept h Thicknes s

(feet)

(feet)

Samples not studied

Cretaceous

Gulf

Lawson Limestone, upper member ( ?) ___________ 2590 ( ?)

Beds of Taylor age - - - -------------- -- ---- 2670

Beds of Austin age ---------"------------------------------ 2950 Atkinson Formation, upper member________________ 3320

.

lower member ( ?) ______ 3465

Comanche(?) undifferentiated - ----- ---- - -------- 3625

80(?) 280 370 145 160
32

Ordovician
to Middle Ordovician1 black shale and sandstone ______ 3657 total 346
depth

1 Bridge, Josiah and Berdan, j. M. 1951, U.S. Geological Survey open-file report, p. 6 and map.

LoGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

149

Lithologic and paleontologic descriptions of cuttings and cores. Samples are cuttings unless
otherwise stated.

nepth
(feet)
0-2750

Description
Samples not studied.

Cretaceous
Gulf Series Lawson Limestone. Upper Member(?).

Top of the upper member ( ?) of the Lawson Limestone is placed

at 2590 ft. on the basis of electric. log correlation. .



Beds of Taylor age

,,,-.

Top of the beds .of Taylor age is placed at 2670 ft. on. the basis

of electric log correlation.

-

2750-2.760 2760-2770

Chalk, white, containing abundant fragments of Inoceramus and other fossil bivalves, and many specimens of Anomalina sholtz-
ensis and A nomalina cosdeni. Like sample at 2750-2760 ft. Pyrite and py~itized sheli fragments
are . common.

2770-2820 . 2820-2830
2830-2840

No change. Like preceding sample~ with the addition .-of a little light greenish-
gray marl.
. Sample shows an increase in the light. greenish~gray marl.

2840-2850

Like preceding samples and many cavings(?) of light-tan dolo.mite and moderately fine-grained sand. The sand is about 50 percent of the sample.

2850-2860 2860-2870

Like sample at 2840-2850 ft. Chalk, white, tan dolomite, a little sand, and fragments of green~ ,, .l ish-gray inarl. The sample contains fragments of Inoqeramus
and other fossil bivalves, echinoid spines, and a few specimens of Foraminifera and Ostracoda. , The microfossils seem. to wash ,from the chalk which is probably caving.

2870-2880

Like sample at 2860-2870 ft.

2880-2890

The sample is composed of about 50 percent light-gray and greenish-gray marl; the remainder is white chalk and a little dolomite. The sample contains abundant fragments of 'Inoceramus and other fossil biv!llves, echinoid spin.es, and a few specimens
. of Foraminifera and Ostracoda. The microfauna seems to wash fro:qt the chalk which is probably caving.

2890-2940

No change.

150
Depth (feet)
2940-2950
2950-2960
2960-2970 2970-2980 2980-2990 2990-3000 3000-3010
3010-3060 3060-3070 3070-3100 3100-3110
3110-3180 3180-3190 3175-3185
3185-3195

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Marl, light gi:eenish-gray, chalky, is the largest part of the sample. in addition, the sample contains a little chalk and tan dolomite, fragments of Inoceramus and other fossil bivalves, and a few specimens of Foraminifera, all of which seems to have caved
t from higher levels.

Beds of Austin age

Like sample at 2940-2950 ft., with the addition of a few fragments of a somewhat darker greenish-gray laminated marl. The top of the beds of Austin age is based in part, on electric log corr~ lation.

Like sample at 2950-2960 ft.
The sample is mainly chalk, and a few fragments of marl and dolomite; a few Inocera-mus fragments.
Marl, light-gray, chalky, is again dominant. Fossils are, chiefly, fragments of Inoceramus and other macrofossils, and a few specimens of Foraminifera from higher levels.

No- change.
Like sample at 2980-2990 ft. The marl is somewhat softer, and microfossils are fairly well preserved. The microfauna contains specimens of Globotruncana sp., Globotruncana marginata, Planulina austiniana, Citharina texana, and Marginulina cf. M. plummerae.

No change.
Marl, gray, and a few fragments of brownish-gray, somewhat light-speckled marl; contains specimens of Foraminifera like sample at 3000-3010 ft., and a few specimens.of ostracodes.
No change.
Marl, darker gray, somewhat light-speckled; nodules of pyrite and pyritized fragments of Inoceramus are common. Microfossils are, chiefly, specimens of Globigerina sp., Globotruncana marginata, a few specimens of Globorotalites un~bilicatus, and a few specimens of ostracodes.

No change.

Like the sample at 3100-3110 ft., and about 50 percent cavings ( ?)

of fine to moderately coarse grained sand.

,;

Core. Recovery 10 ft.

Top. Chalk, gray, marly, somewhat light-speckled. The slightly

speckled appearance is due to crushed fragments of fossil sliells.

The marl contains fragments and prisms of Inocera-mus and .a

few fish scales.

'

Core. Recovery 10 ft. Top and bottom. Chalk, marly, as in core at 3175-3185 ft. A washed sample at the top part of the core contains specimens
of Globigerina sp. and Globotruncana marginata that are common in the lower part of the beds of Austin age.

-~

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

151

"'.:

Depth (feet)

Description

3195-3200

Core, Recovery 10 ft.

Top. Chalk, brownish-gray, marly, light-speckled. More highly speckled than the core at 3_185~3195 ft.

Bottom. Like top part ofthe cote, but softer and more shaly.

3200-3210

Marl, gray, somewhat light-speckled, like the preceding cores. Nodules of pyrite and fragments of Inoceramus are fairly common.

3210-3230

No change.

3230-3240

Core. RecoverS' 2 ft.

Marl, light brownish-gray, somewhat light-speckled, chalky, containing shreds of carbonaceous material. The sample of cuttings from the same depth as the core contains specimens of N onionella austiniana.

3240-3250

Sample not described.

3250-3252

Core. Recovery 1% ft.

.: ~ .

Like core at 3230-3240 ft."

3252-3262

C,,- o. re. Recovery 10 ft. Top. Chalk, light brownish-gray, marly; contains a few shreds
. of carbonaceous material.

Middle. Like top part of .the core; contains fragments qf /no. ' ceramus , much fragmental, calcitized microfossilerous material, '" and sp~Ciinens of Globigerina sp. (common).

3262-3268....

Bottom. Like middle part of the core, but i:nore shaly and more

highly speckled with crushedyellov:, chalky fossil rnaterial.

. Core. Recovery 6 ft.

....

. Top. M~rl, light tan-gray, chalk~. , . ~

p:~ BottQm. Like 'top part of . the core; contains fragments of Inoceramus and small fragments of calcitized microfossils. This
kind of material commonly occurs in the lower part of the beds
of Austin age.

3268-327.8

-l -:

li

3278-3288 "

Core. Recovery 5 ft.

,'

Top. Like core at 3262-3268 ft., but not as well consolidated.
. Bottom, Marl, light tan-gray, soft; chalky. '
Core. Recovery 10 ft.

Top. Marl, brownish-gray, yellow-speckled.

'.

Bottom. Marl, like top part of 'core; chalky.

3288-3297
..
3297-3300

.Core. Recovery 8 ft.

Top. Marl, tan-gray, containing darker bands or lamjnations of

the same material; speckled with crushed, chalky, dark-stained,

fragmental fossil shells,



Bottom. Like 'top part of core. '

Co~e. Recovery 3 ft.

''

-~

Top, Like core at 3288-3297 ft., bu.t less highly speckled, and, in

" part, bard; white chalk.- The ' marl is somewhat carbonaceous.

152

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

Bottom. Marl, brownish-gray, moderately hard, chalky, some~

: i

what light:speckled.

i:

3200-3310
.' ,

Core. Recovery 10 ft. Top. Not described or no sample. Bottom. Like core 3297-3300 ft.

3310-3320

core. Recovery 10 ft.: Top. No sample?

. Middle. Chalk, white, hard, highly sandy. Sand is at. least 50

percent and possibly 75 per cent of the sample.

.. ':: . ,,

,,. . Bottom. Sandstone, light-tan, fine to moderately fine grained, ' ,., ,.. higlUy pyritic, containing lenses of grayish-green shale.

3320-3328

f.

Atkinson Formation. Upper Member. . .



\ . > .

::

{) ~. :., - '.. .

The top of the Atkinson Formation may be .at the middle part of

the core at 3310-3320 ft.

'

_.,.. ,,

:- : ~

Core. Recovery 7 ft.

. ,_

~

. ...

Top. Shale, grayish-green, containing lenses ~nd 'inclusions of

light-gray, fine-grained sandstone: . ' '

Bott?m ~ike top part of core.

~328-?,338
3320-3340 3340-3350
, '1 .. .

Core. Recovery 6 ft. Top. Clay, grayish-green, mo~erately. ~oft, : highly silty, ir.regu-

la:i-ly sandy, micaceous. Botto'm. Siltstone, light g~ayish-green, moderately soft, mica-

ceous; and highly argillaceous.., - .

Like the cores at 3320-3328 ft. and 3328-3338 ft., and cavings from

higher levels: r;



. . .



Shale, grayish~green/ flaky, and 1fragtrtents of s'a,ndstone that may '
sp. .-' occur al(lenses in-the shale. Th~ sandstone contains fragments
' ' of Ostrea

3350-3360 3360-3410

" Not described.
Like sample at

3340-3350

ft.;

mainly

sh?,le"'and

a

little '~t'ifd:)

3410-3430 3430-3440

Not described.

:, 1 ' ' ..

'

. .

.. ~

Shale, grayish:green, flaky, somewhat micaceou:;;, and a little green-

ish-gray micaceous siltstone that may occur as lensei in the

shale. .The sample .contains '8 ' few specimens of very small

Gumbelina sp. and Globigerina ,sp. ,(common in the Eagle Ford'

Shale in Texas), and a few fragments of fish bones~ and car-

bonac.eous ]paterial.

3440-3450 . :...-No- change.

' ..

. .

:. .,.t ., .

11

,:.

.

.

.

,., ,1,..,.

. . ' . --'"
_

3450-3460 Shale, 50 percent; siltstone 50 percent.!<'Shale contains a few speci-

mens of Gumbelina sp., Globiger:ina sp., and Planulina eaglefor-

densis. small, brown, irregular-shaped ..nodules of . siderite. are

,

! ~n th~ sample. 4 \: '~"'

' -

.~ 1

. .. .

3460-3470 \,. Shale, :grayish-green, flaky, and micac_eous siltstone.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

153

Depth (feet)

Description
Atkinson Formation. Lower Member.

11470-3480
8480-3490 3490-3500
~500-3510
3510-3520

The top of the lower member ( ?) of the Atkinson Formation is

questionably placed at 3465 ft. -oli the basis of electric log correla-

tion.

Like sample at 3460-3470 ft. The shale contains crushed !"ragments

of chalky shells and specimens of Foraminifera; the species are

not identifiable.

Shale, greenish-gray, flaky, and many fragments of cream, fine-

grained sandstone.

Shale, green, flaky, and a little sandstone and siltstone.

Like the sample at 3490-3500 ft., and a few specimens of Planulina eaglefordensi8, Gi.imbelina sp., and Globigerina -sp.

No change:

.

.

3520-3530

No sample?

3530-3540

Shale, green, flaky, and a few fragments of light greenish-gray, poorly-sorted, fine to moderately coarse grained sandstone.

3S40-3550

Like sample at 3530-3540, but showing an increase of sand; a few green-tinted moderately coarse grains.

3550-3560

Shale, green, flaky; a little siltstone. Shale contains small, crushed,

. ~ .: white specimens of unidentifiable microfossiis.

S560-3S70 ,. Like sample at 3550-3560 ft. .

i

3~70-3580 .., . Shale and siltstone like the immediately precedjng samples. A little
. . . _. ,._ JIJ'.'''' ,- fine to coarse~grain. ed, so:ft; glauconit.ic.sands'.tone.

3580-3590 Like sample at 3570-3580 ft.

.

: r

.

...

.

' '3590-3600 .,. Sl:!ale, green'; flaky, somewhat silty; a little sand, and a little car-

.. bonaceous

m ~.

a

t

e

r
'

i.a..l

;

a

few.

fragments .

of

a

thin-shelled

lnoce-

ramus.

'.?

3600-3610

Shale, and a few fragments of siltstone and sandstone.

,. .

3603-3623 .... " Core. ~ecovery 13.3 ft.

. : ' -\. .

~" - .

."-\l~ .

-4th 4 ft. Siltstone, light-gray, 'moderately hard, micaceous, argil-

laceous, containing thin lenses cif white, hie-grained, glauconitic

'sandstone. Glauconite occurs in very small nodules. The sample

contains a little siderite.

'

- J.

:.., .... , :~ !r

' . "'!

3625-3635 . . Core. Recovery 4 ft. Top. Sandstone, brownish"r.ed,' argillaceous, micaceous, poorly sorted, fine to coarse-grained. ' ,. '

..

i' -.'. Bottom. Clay; 'red arid mustard mottled, moderately ha'rd-;contains scattered, fine to coarse' quartz grains.

3635-3645

Core. Recovery 1 ft.

J,.:.

. "I

: Sand, mottled red and mustard. C:Iay like the bottom of core

at 3625-3635 ft.

;. ..

154

QEORGIA GEOLOGICAL SURVEY BULLETIN 74

. D epth (feet)
3645-3655
3655-3665

Description
Core. Recovery 2.! ft. Top 1 ft. Sandstone~ red and gray, soft, fine to moderately fine grained, argilla~eous, micaceous. Middle 1 .ft. Sand, red, soft, argillaceous. Bottom 72 ft. Sandstone, red, and red and greenish-yellow mottled clay.
Core. Recovery lh ft. Top 3 in. Sand, soft, fine to coarse-grained,quartz, in matrix of red clay.
Bottom 3 in. Sandstone, light-red, pale-green and white mottled, . fine-grained, highly argillaceous (possibly ashy) ; contains one
large.pebble of quartzite.

Ordovician

Middle Ordovician Series

The top of the Paleozoic is placed at 3657 ft. on the basis of electric log correlation. The samples from 3657 to 3735 ft. are possibly weathered Paleozoic rocks.

3665-3667

C.ore. Recovery 2 ft..

Top. Clay, brownish-red and yellowish-green mottled, hard, ir-

regularly sandy, highly micaceous; contains a fragment of a fos-

sil bivalve.



. -4.

;'V

Bottom. Like the top part of core. Re~ _clay with light greenish-

gray streaks.

3667-3672 Core. Recovery 4 ft. Top. . Clay, shaly, red, moderately hard, highly micaceous. ,

i .

Bottom. Clay, shaly, red, gray and greenish-yellow streaked, highly micaceous.

3672-3680 Core. Recovery 6 ft.

Top. Clay, shaly, like the core at 3667-3672 ft. in lithology and

color, but highly sandy (fine-grained sand); might be classified

r.

as an argillaceous sandstone; cont~ins a mold of an unidentified

;

; microfossil.

Middle. Clay, shaly, red, highly micaceous.

Bottom. Shale, red, showing yellowish-green and light bluish-

gray streaks, and irregular areas of sandy shale.



3680-3685

Clay, shaly, red, and sandy mi~aceous clay and red sandstone like

1.

., preceding cores; ab.out 50 percent of the s~mple is composed of

~ I

cavings of different kinds of material fro~ higher levels.

3680-3685 3685-3690

Like the preceding sample from the same depth. Also conta~ns a

few ~ragments of a white and pink, hard, dense, fine-grained,

quartzitic sandstone.

/ .

' .

.

Like the sample at 3680-3685 ft.; red shale, sandstone, and quartz-

itic sandstone.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

155

Depth (feet)

Description

3690-3695 Like the sample at 3685-3690 ft.; but containing little quartzite.

3695-3700

Like the sample at 3690-3695 ft., and many fragments of purplishred, very fine grained, moderately hard sandstone.

3700-3720

No change.

3720-3725 .

Mainly cavings of light purplish-red, hard, fine-graine.d sandstone, and a little light-green sandstone.

3725-3735

Clay, red, micaceous, sandy, and light purplish-red .and light-green, hard, fine-grained sandstone; a few fragments of quart:l:ite. About 50 p ercent of the sample is cavings from higher levels.

3735-3740

Like the sample at 3725-3'735 ft., with the addition of a few frag-

ments of black, unctuous, highly micaceous shale and hard black

sandstone. This sample is probably the top of the unweathered

Paleozoic rocks.

-

3745-3795

No change.

3790-3795

Cuttings are a mixture of red .shale and sandstone, and materials from the Atkinson Formation; also, cuttings of the black, micaceous shale and black shaly sandstone of the Paleozoic.

3795-3800

Like the sample at 3790-3795 ft., and many fragments of light greenish-gray, hard, micaceous sandstone that is possibly interbedded with the black shale and the black, shaly, highly micaceous sandstone of the Paleozoic.

3800-3895

No change.

3892-3895

Core. Recovery 2 ft.

Sandstone, light greenish-gray, very dense, very fine grained,

quartzitic sandstone containing thin partings. of black, highly

micaceous, unctuous shale.

-

3900-3905

Sample at least 75 percent cavings from much higherlevels; also fragni~ntS of the black shale arid sandstone like core at 3892-3895
ft.

3905-3950

No change:

3950-3955

Cavings about 50 percent. The remainder of the sample is fragments of the black-shale-streaked sandsto'ne described in core at 3792-3795 ft.

3955-3965

No change.

3965-3970

Siiuilar to the immediately preceding samples, but with few fragments of the black shale, arid many fragments of the light--green to white, highly micaceous, hard sandstone.

3970-3990

No change.

3990-3995

This sample shows an increase in the amount of black, micaceous shale and the gray micaceous sandstone.

3995-4003 T.D. No change.

156

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

ECHOLS COUNTY

Operator: H~nt Oii Company

GGS. No. 158

Landowner: Superior Pine Products Co. Elevation: 156ft. (derrick

Well4

floor)

Location: Land District 13, Limd Lot Total depth:_3916 ft. 219; from Northwest corner of Land Completed: Mar. 16, 1948
Lot 219, go 1978 ft. east, thence 1106 ft. S. go W. to location.

'

Summary of Stratigraphy

Tertiary

Depth
(feet)

Thickness
(feet)

at Paleocene -------------------------~-------------------- .? In beds containing Tamesi fauna 2600.ft~

?

Cretaceous

Gulf

Lawson Limestone, upper member_________________________ 2610 ( ?) 70

Beds of Taylor age ------------------------------------------------------ 2680

270

Beds of Austin age ---------------------------------------~----- 2950

322

Atkinson Formation, upper member__________________________ 3272

.168

"



lower member__________""------------- 3440

189

Comanche undifferentiated -------------------------------------- 3629

282

Ordovician , .

. , .

,

.

.

,,j

to

Middle ' Ordovician1 weathered ( ?) . zone --~---------------- 3911 total 5

t .





depth

f"







~ithologic and paleontologic descripti_ons~ of C':!rt:. tmgs and cores. Samples are cuttmgs unless '' 1

otherwise stated.

., '

) .-:.

?t!i~ ~ .,..,

Description

0~262~ Samples nof studied. ..,;

Cretaceous
Gulf Series

. .r ..

.w ,.. .~:

Lawson Limestone. Upper Member. ~.

2610 ( i)

The top of the upper member of the Lawson Limestone (upper-
is most Cretaceous) provisionally placed at 2610 ft. on the basis

of electric log correlation_. .

.

...

~Bridge, Josiah and Berdan, J. M. 1951, U.S. Geological Survey open-file report, p; 5 and map.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF. GEORGIA

:157

D ep th (feet)

rDescription

2620-2630

Sandstone, greenish-gray, fine and even grained, highly glauconitic,

i- _calcareous, containing many specimens of. Glo~orotalia velascoen-

2600-2610

sis, Globigerina triloculinoides, a small form of Ci bicides sp.,

(est.' depth) 2630-2640 (2610-2620

and other small Foraminifera.2
Limestone, cream, hard, calcitic, gypsiferous, containing poor_ly-
preserved molds and fragm~nts of maids of inacrofossils and a

est. deptl:l)

few microfossils.

2640-2650

( "
'

.", .,

Limestone,

cream,

chalky,

composed, .mainly,

of

a

mass

of

p~~;ly

preserved molds of microfossils arid a few macrofossils. The

. - ~ ' ~

i. ~ . ,. :~

microfauna in this sample is unusual, and is somewhat similar

.L '

to the fauna that has been reported from the "Upper Cretaceous"

beds in Trinidad; also, it contains 'several species occurring in

the upper member of the Lawson Limestone in a few wells .in

Florida; and even seems to have certain Tertiary aspects.

. 2650-2660

,J'I . ;

..

of Limestone, . light7cream, somewhat gypsiferous, containing frag- ments poorly preser:ved molds of fossils. The character of the material is somewhat li~e sample at 2640-2650. Amo-ng the un-

, usual features, is a mold of a Borelis-like form in a fragment of

> the limestohe, and a fragillent showing distinct coralline .struc-

ture.





2660-2670

Like sample a".2650-2660 ft., but contains more traces of molds and impressions of microfossils.

2670-2680

Like sample at 2660-2670 ft. A few fragments are highly pyritic, and a few others snow a trace of glauconite.

..-' .!

Beds of Taylor age

! 2680-2690'; ;chalk, white, glauconitic:' The fauna is composed of fragments of
. of In~;~ceramus, a few specimen~ 6I Ostracod~, and many speci-

mens of Anomalina sholtzensis, Arunnalina cosdeni, Globotrun-

. -~ . cana area, Bolivinoides decorata, Globorotalites conicus.

Like sample at 2680-2690 ft. Ino~eramus fragments and prisms

.
2700-2720 27207~7~0

abundant.

' ',J!.

No change, but few well-preserved specimens of' Foraminifera,.and

l' a decrease of glauconite.

~ ,.



..

: .. . . . .~

. . . J: :l]

Chalk, white, Inoceramus fragments and a few specimens <?f Fora-

.., ' . minif~ra. ' . ~ '41' _, .,, ' ' . . 1- . :l"ll

. . . .. " ..;;

2730-2740 .~,;

Chalk, ~hi~, containi~g ~uch fragmental calcite material __(Ino--

.. ceramu8

prisms,

s~ecimeris

of

Foraminifera. ,.

and

f

r

a

g.

m

e
.~

n

ts
. . .

of

'Thi.s sample contains a foraminiferal assemblage closely resembling the Tames/ f~:n,~ that
o ccurs in beds of Paleocene age in many wells in wes t ern ~tlorida and southern Georgia~ The sample that follows at 2630-2640 ft., is classified as the tipper member of 'the ' Lii.wson . 'Limestone. . which is Navarro (Late Cretaceous) in age. As a possible explanation of the discre-pimcy between the deJ>th shown by the electric log characteristics and the depth of the hole at the time the samples were taken, we suggest .a lag in theaeturns amounting t o
about 20 feet . On this . basis, the estimated corrected deJ>th of this sample would be 26002610 ft. and the estima-ted corrected depth of the next deeper sample .would b e 2610-2620 ft.

158
Depth (feet)

.

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description

' . . #.

molds of microfossils and macrofossils). The chalk is somewhat

speckled with small grains of dark-green, glauconite and of py-

rite; some fragments of chalk are highly pyritic.

2740-2750

Chalk, white; and a little gray marly chalk. -The sample contains

Inoceramus fragments and prisms, and a few specimens of long-

/.

ranging species of Foraminifera.

2750-2800

Like sample at 2740-2750 ft.

2800-2810

Chalk, white, Inoce?amus fragments and prisms, many large nodules of pyrite, and a few specimens. of Foraminifera. '

2810-2820

Chalk, white, many fragments of Inoceramus and other fossil bi-

valves, a f ew specimens of F oraminifera, and a few fragments

of light olive-gray marl.

r

2820-2830

Like sample at 2810-2820 ft.

2830-2840

Chalk, light olive-g1ay, and about 25 percent gypsum.

2840-2850 .

Chalk, light-gray, marly; abundant Inoceramus prisms, and a few specimens of Foraminifera and Ostracoda; also a few fragments of gypsum, which may be caving.

2850-2860

Like the sample at 2840-2850 ft.; Anomalina sp. is the common species of Foraminifera in the sample; no gypsum.

2860-2960

No change.

2960-2980
2980-2990
2990-3000 3000-3100 3100-3110. 3110-3180 3180-3190

Beds of Austin age

The top of the beds of Austin age is pl;~ed at 2950 ft. on the basis
of electric log correlation.

Chalk, white and light-gray, soft, and a few fragments of harder,

light-speckled, olive-gray chalk. The sample contains abundant

Inoceramus prisms, fragments of Inoceramus and other fossil

bivalves and a fe~ specimens of Foraminifera.



Chalk, dark-gray; marly; contains abundant hwceramus prisms,'

abundant specimens of Foraminifera, and several species of

Ostracoda. The common foraminiferal species are: Globotrwn-

cana spp. Globigerina sp., Planulinasp., Planulina austiniana, a

few specimens of Valvulineria in{re'qtens, Planulina texana,

Giimbelina sp., Robulus sp., and Kyphopyxa christneri. The sam'-

ple is definitely Austin in age.



Like the sample at 2980-29~0 ft.; contains specimens of Citharina

t ex ana.

,-_

No change.



I

Chalk, gray, ' somewhat white-speckled, marly containing many

Inoceramus prisms and Austin species of Foraminifera.

No change.

Core 5. Recovery 8 ft.
Top 3 ft. Marl, gray, somewhat white-speckled (micr~fossili

ferous). No chitnge .in fauna.

l

Middle 2 ft. Marl, so~ewhat lighter in color.

LOGS OF SELECTED W:ELLS IN THE COASTAL PLAIN OF GEORGIA

159

D epth (feet)
3190-3200 . 3200-3210 3210-3215 3215-3224
3224-3234
3234-3244 3244-3250 3250-3255

Description

Bottom 3 ft. No change.

Core 6. Recovery 4% ft.

.

Top 3 ft. Chalk, gray, marly, containing Austin species of Fora-

minifera; Giimbelina sp. common.

. __ _

Bottom 1% ft. Like top part of core, but slightly darker.

Core 7. Recovery 4% ft. Top 1% ft. Chalk, light-gray, marly; no change in fauna.

2nd 1% ft. Marl, dark-gray.

3d 8 in. No change.

Bottom 10 in. Marl, lighter gray.

Core 8. Recovery 5 ft.
Top 4 ft. Like the bottom part of Core 7 at 3200-3210 ft. Bottom 1 ft. Slightly darker marl; no change1 in fauna, but . specimens of Foraminifera less abundant.

Core 9. Recovery 9 ft.

Top 3ft. Chalk, light-gmy, moderately 1'\ard. No change in micro-

fauna. ,~



2nd 3 ft. M~,r,..l., dark-gray, light-sp.eckled, containing fragments

of fish scales, a few fragments of Inoceramus and specimens of

Foraminifera.

3d 1 ft. Chalk, white, marly, moderately hard. No change in

microfauna.

4th 2 ft. Marl, gray, some~hat white-speckled, containing frag-

ments of fish scales and a P ecten-like bivalve. Dominant species.

of Foraminifera are: Gumbelina sp., Globige?-iM sp., and a small

Anomalina sp.

'

'

Core io. Recovery 10 ft. Top i ft. Like the bottom part of core 10 at 3224-3234 ft. Globo-
truncana sp. common in the fauna.

2nd 2ft. Chalk, light and dark-gray, marly; contains fish scales; no change in microfauna.

3d 3% ft. Marl, dark-gray, light-speckled.

Bottom 3% ft. Chalk, white, moderately hard, no change in . microfauna.
'
Core 11. Recovery 3% ft.

Top 2 ft. Like bottom part of core 10 at 3224-3234 ft.

Bottom 1% ft. Marl, gray, soft; no change in microfauna.

Core 12. Recovery 2ft.

Chalk, white, moderately hard, common species of Foraminifera are: Globigerina sp., Gumbelina sp., Pleu1ostomella sp.

Core 13. Recovery 5 ft.

Top. Chalk, gray, somewhat light-speckled, marly; Microfauna like core 12 at 3244-3250 ft.

Bottom. No change.

>~:< _:: :
- -. 160

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

:.os : >\.
I

Depth (feet)
3255-3265
,,..
3265-3272

Description
Core 14. Recovery 3 ft. Top 1 ft. Like core 13 at 3250-3255 ft. Bottom 2 ft. No change.
Core 15. Recovery 3.! ft. Top. Marl, gray, white-speckled, and lens of light-gray chalk containing much comminuted calcitic, chalky debris of micro::~ fossils and macrofossils. No change in microfauna. Bottom. Chalk, light-gray, moderately hard, and dark-gray, white speckled marl.

3272-3277 3277-3285
3285-3287
'
,,
3287-3297 3297-3307

Atkinson Formation. Upper Member. !

Core 16. Recovery 1 ft. Shale, dark greenish-gray, flaky, unctuous, Core seems to be contaminated with drilling mud; no definitely indigenous specimens of Foraminifera ob.served. ,

Core 17. Recovery 3 ft.

Top. Shale, green, containing irregular vein-like silty streaks,

and a few rounded, moderately coarse grains of quartz. The
a sample contains few fragments of fine-grained, somewhat glau-

conitic sandstone, and a few fragments of Ostrea-like fossil bi-

valves.



Middle. Shale, green, flaky, interbedded with light-gray, mica-

ceomi', slightly glauconitic siltstone; contains a few small speci-

mens of Planulina eaglefordensis.



Bottom. Siltstone, gray, soft, micaceous, iriterlensed with green _shale; contains a few phosphatic fragments, a few shreds of carbonaceous material, and pyrite; a few small specimens of Planulina eaglefordensis.

Core .18. Recovery 2 ft. Shale, green and light greenish-gray, argillaceous, micaceous, and very fine and even grained, soft sandstone, in thin alternating layers. The material contains a little phosphatic material and glauconite; a few carbona-ceous shreds. The fauna is com.: posed of shell .fragments. Ostracodes, abundant specimens of. .Planulina eaglefordensis, Globigerina sp., and others.

Core 19. Recovery 6 ft. Top. Sandstone, ., light greenish~gray, soft, v~ry fine ~ained, argillaceous, mi~aceous, containing very thin partings and streaks of green shale; phosphatic nodules and traces of glauco-
nite and pyrite.

Middle. No change.

Bottom. No change.

Core 20. Recovery 9 ft.

,

Top 4 ft. Siltstone, light greenish-gray, micaceous, finely glaucoL

nitic, containing very thin lenses of green shale; a few frag-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

161

Depth (feet)

Description

ments of carbonaceous material, phosphatic material and worn shells.

:,

2nd 2 ft. Like the top part of the core, but containing much

. glauconite.

_Bottom 3 ft. Shale, green, flaky, and lenses of micaceous siltstone.

3300-3310 Shale, green, a little micaceous .'siltstone, and cavings from higher

k~L

.

: -

3310-3330 No change.

3330-3340

Shale, and many cuttings of moderately hard, .fine-grained, some-

what glauconitic, micaceous siltstone that contains phosphatic

nodules and fragments of lignite and shells of Ostrea--like bi-

valves.

-.



3340-3350 3350-3360
3360-3370 3370-3380
3380-3390 3390-3400
3400-3410.

Like sample at 3330-3340 ft.
Sandstone, greenish-gray, containing abundant fragments of Ostrea-like bivalves; glauconite and phosphatic nodules (fairly common); a little green shale.
Sandstone, s_hell -fragments and phosphatic nodules; many fragments of green shale; a little glauconite and mica.
Sandstone and sand, fine-grained, quartz; many fragments of Ostrea sp.; a little 'shale, a little inica, and a few phosphatic nodules.
No change.
Sand, fine-grained, even-grained, micaceous; containing many fragments of Ostrea sp. and other fossil bivalves; a few fragments of green shale; a few phosphatic nodules and fragments of carbonaceous material.
Like sample at 3390-3400 ft.

3410-3430

Sand,' mica, and fragments of green shale; shell fragments much

less abundant; a few fragments of carbonaceous material, and

a trace of gl!iuconite.

-

3430-3440 Like sample at 3410-3430 ft., but green shale more abundant.

3450-3460 3460-3470
3470-3490 3490o3500

Atkinson Formation. Lower Member.
Material like sample at 3410-3430 ft., but contains specimens of Reophax pepperensis, A mmobaculites agrestis, A. iunceus, Trochamn~ina rainwateri, and ~thers.
Shale, green, micaceous, and fine-grained sand; a few fragments of carbonaceous material and a few shell fragments.
Shale, grayish-green, and a little silty, micaceous shale; a little fine-grained sand, probably caving. The sample contains a few fragments of carbonaceous material and of shells.
Like the sample at 3460-3470, and a few fish teeth and fish bones. Similar to the samples at 3470-3490 ft., but fragments of very

tJ

162

GEORGIA GEOL<JGICAL SURVEY BULLETIN 74

Depth (feet)

Description

fine grained sandstone are common. The sample contains frag-

ments of shells and fish bones and specimens of Reophax sp., and

many specimens of Ammobacn.~,lites agrestis and Ammobaculoides

plumme-rae.



3500-3510

Like the sample at 3490-3500 ft., but shale is strongly dominant, and the sample contains very few specimens -of the arenaceous species of Foraminifera.

3510-3560

Like the sample at 3500-3510 ft.

3560-3570

Shale, green; and a little light-gray, micaceous siltstone; a few shell fragments and a few fragments of carbonaceous material..

3570-3580

Like the sample at 3560-3570 ft.

)
-~

3585-3595

Core 21. Recovery 2% ft.

Top. Sandstone, soft, light greenish-gray, fine-grained, even-

grained, argillaceous,_glauconitic, somewhat phosphatic..

3595-3602

Bottom. No change. Core 22. Recovery 6 ft.

. '"1..
r;.~_,'../-

Top 4 in. Sand, unconsolidated, like the sandstone in core 21

at 3585-3595 ft. and fragments of gray and greenish-gray, mi-

caceous shale.

2nd 4 in. Sandstone, greenish-gray, moderately hard, .argillaceous, micaceous, glauconitic, very fine grained.

3d 4 ft. Like 2nd 4 inches of this core, but less firmly consolidated.

Bottom 16 in. Shale, greenish-gray, silty, micaceous, glauconitic, containing specimens of Ammobaculites. advenus, and fragments of phosphatized fish bones.

3602-3612
-

Core 23. Recovery 10 ft. 3 Top 1 ft. Clay, shaly, greenish-gray, silty to sandy (very fine grained sand), highly micaceous. Contains a few shreds of, carbonaceous material, a little phosphatic mate1ial, a few specimens of Ostracodes, and small fragments of shells.
2nd 3 ft. Clay, shaly~ greenish-gray, silty, somewhat glauconitic, highly micaceous, containing ~hreds of carbonaceous material, a few fragments of fish bones, a few specimens of A mmobacu" lites advenus, and a few specimens o'f ostrac~deis.

3d 8 in. Shale, greenish-gray, thinly lamina1;ed, slightly micacaceous, silty, and carbonaceous; contains a few fragments of Inoceramus, specimens of T1ochammina wickendeni, and very small specimens of Globigerinasp. and Giimbelina sp.

4th 10 in. Shale, greenish-gray; micaceous, . silty, irregularly glauconitic; contains pyrite nodules, ~ little phosphatic material, a fe'w shell fragments, and a few minute specimens of Globi-
gerina sp.

'Two feet of core unaMonnted for.

-

LOGS OF SELECTED WELLS IN THE CoASTAL PLAIN OF GEORGIA

163

Depth (feet)

Description .

Bottom 2% ft. Shale, green, unctuous, containing silty micaceous partings (mainly drilling mud?).

3612-3620 Core 24. Recovery 9 ft.

Top 8ft. Sandstone, gray, soft, fine-grained, argillaceous, highly

micaceous; . contains a trace of glauconite, a few phosphatic nodules, and a little dark~gray shale, possibly occurring in, thin

.:.:.

lenses. The shale contains specimens of very small Foramini-

fera, and a few shreds of carbonaceous ma"terial.

Bottom 1 ft. An unsatisfactiory sample of greenish-gray shale, fine to coarse-grained quartz sand, and a little glaucon~te, mica, and phosphatic material.

3620-3629

Core 25. Recovery 5 ft. Top 3 ft. Sand, light grayish-tan, fine to moderately fine grained, etched, argillaceous, containing a few coarse-grains, fragments of gray shale, and a little mica.

2nd 1 ft. Sand, greenish-gray, fine to coarse-grained, argilla-

ceous, glauconitic, quartz. The glauconite occurs in crevices in

some coarse grains, and one highly glauconitic plant fragment

was observed.

'

~
Bottom 1 ft. Sandstone, gray, soft, micaceous, argillaceous. The

sandstone contains irregular partings of gray shale, and a few

lenses of gray, flaky shale, in which occur faint traces of dwarf

specimens of Foraminifera.

3629-3639 3639-3648 3648-3658

Comanche Series undifferentiated
Core 26. Recovery 7 ft. Top 2 ft. Sandstone, light-gray, fine-grained, argillaceous (bentonitic?), micaceous, the sand grains are etched and angular.
2nd 2% ft. Clay, shaly, gray and red mottled highly micaceous, sandy (fine-grained sand).
Bottom 2% ft. Sandstone, greenish-gray, soft, fine-grained, highly argillaceous and micaceous.
Core 27. Recovery 1 ft. Top % ft. Sand, fine to coarse-grained (coarse grains common), etched, argillaceous, and a little light greenish-tan, unctuous, sandy (very fine grained sand) clay shale. The sand contains many lemon-yellow and a few pink grains of quartz and a few grains of feldspar. -Bottom % ft. Mudstone, light-gray, mustard, and light-red, mottled, unctuous, sandy, somewhat micaceous.
Core 28. Recovery 4% ft. Top 2% ft. .Clay, shaly, red and gray mottled, sandy, highly micaceous; the sand is fine to coarse-grained, and moderately fine grains are common.
Bottom 2 ft. Mudstone, gray, reddish-brown and mustard, mottled, highly micaceous.

. .. 5. .# .!:: .~-

164

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

J

Depth (feet)

Description

3658-3668 Core 29. Recovery?

Top. Sand, light-red, clay-stained, fine to coarse-grained, etched.

Bottom. Sand, light-red and gray, mottled and stained, soft,

..~... .

argillaceous, quartz. The sand grains are mostly moderately

fine and subangular.

3668-3678

Core 30. Recovery % ft. Sand, fine to very coarse-grained, containing many lemon-yellow, pink and a few r ose quartz grains, and a little feldspar; a few fragments of purplish-red clay.

3680-3700

Mainly cavings of gray shale, brownish-red, purplish-red and mustard-yellow clay shale, sand and mica.

3698-3708

Core 33. Recovery 1% ft.

Top 1 ft. Sand, brownish-red stained, soft, fine-grained, sub-

angular, argillaceous, highly micaceous; 'a few coarse grains of

sand in the sample.

Bottom

%

ft.

Sandstone,

red

and

gray,

soft,

fine

to

- P_ ,
coarse-

grained, argillaceous, highly micaceous.

?~.-~

3708-3718

Core 34. Recovery 1 ft. Sand, fine to coarse-grained, subangular to rounded, quartz, containing yellow and pink grains and a little feldspar.

3718-3728

Core 35. Recovery 3. in. Clay, red and gray mottled, silty, very highly micaceous.

3728-3738
-~ - t . .

Core 36. Recovery 2 ft.

Top. Sand, light purplish-red, soft, fine to very coarse-grained

(small pebbles), argillaceous, highly micaceous; yellow arid pink-

tinted grains abundant.

.

' .

Bottom. Sand, like top part of core; in a matrix of highly mica-

ceous red clay.

3738-3748

Core 37. Recovery 1 ft..

Top. Sand, light-red like core 36 at 3728-3738 ft., and mustard- .

yellow micaceous clay. The sand grains are moderately fine to

moderately coarse:



3748-3758.

Bottom. Sand, light-red, fine to very coarse-grained, micaceous; many grains are tinted yellow and plnk.
Core 38. Recovery "i ft.
Like core 37 at 3738-3748 ft. The sand is m~inly quartz and a little feldspar.

3758-3768

Core 39. Recovery 2ft. Top. Sand, light-red, mostly fine-grai~ed, micaceous, argillalaceous; a few moderately coarse grains, tinted yellow and pinK.

Bottom. Sand, red and gray mottled, fine-grained, even~grained,

highly micaceous, quartz.



3768-3770

Core 40. Recovery % ft. Sand, red and gray, fine-grained, highly micaceous, argillaceous, quartz.

: - Aki

LOGS OF SELECTED WELLS IN THE COASTAL P _LAIN OF - GEORGIA

165

Depth (feet)

Description .

377~-37.88' , .f Core 4't. Recovery . 3 ft. : _

. _. _ . ;)

~

~ ... Top 2 %ft. . San(!, light-red and gray, soft, fine to co-arse-grained,

mi"aceous, argi-llaceous.



<) ' ~ 1,., .

1 , Bottom .% _ft; Clay, brick-red, and gray mottled, silty ,to very finely sandy, micaceous.

3790-3800

Sand, fine to very coarse grained, a few fragments of red shale, and cavings of gray shale from much higher levels.

._ 3798-3805
~ ..H I s

Core 43. Recovery 2 ft.

,

Top. Sand, light-red; fine to moderately coarse grained, etched,

.somewhat micaceous, argillaceous.

Bottom. Shale; dark-red, and some .sand like top part of core. ';{'he appearance of the shale differs somewhat from the overlying red clay shale.

3805-3807 Core 44. Recovery 1 ft.
Shale, ~ed, like bottom part of core 43 at 3798-3805 ft. 3807-3~l7' .t -:.-Core 45. Recovery?
Top. Shale, dark-red, somewhat gray spotted, somewhat silty.
Bottom. Clay, shaly, red, silty.

3817-3827

Core 46. -Recovery -% ft. -' ""

. Shale, red, somewhat gray and mustard-yellow mottled, unctuous,

'sciiuewhat silty.

. :,-,,. ,.

- .,

3827~3837

C- ore 47. Recdvery 3 in.

' '

<'

.,.L.

C. l,:ay,- red,

.and 'sand' ,

unconsolidated.
1. , "

3837-3840 .. - Core 48.' Recovery 3 in. .

_

'

' ~ ~ Y ' Sarid-, fhie to coarse-grained, roughly angular, and .red shale.

3840-3850

Core 49. Recovery 2 ft.

Sand, micaceous, and some red shale; The core seems to be con-

taminated.

.

3850-3860

Core 50. Recovery 1 ft. Sand, soft, fine to moderately fine-grained, micaceous, argillaceous; a few coarse grains of sand. The sand is similar to that in beds of definite Comanche age.

3860-3868 3870-3880

i' _ Core 51. Recovery 8 in.



' :; An unconsolidated lump of red shale and a little sand, as in the

, samples beginning at 3805 ft. 1
" Sand, -fine to very coarse-grained, red shale, an_d about _50 percent

l;.. .cavings from much higher levels. .

3880-3900

No change.

3900-3903
1i: j .
. :1t

Many cavings, and abundant fragments of bluish-green, finegrained, .s_andstone_; white and ' y~llow, fine-grained . quartzite; and fragments of an opaque green mineral. The sample may
be from a bed of quartzite boulders and other material derived fro~ the weathered surface of the underlying early Paleozoic rocks and redeposited in sedimentary beds near the base of the
Mesozoic.

166
Depth (feet)
3903-3905
3905-3912

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Clay, shaly, red and g~.:eenish-gray; mottled, and many fraiments

of yellow and white quartzite, green sandstone, and the opaque

green mineral like the sample at 3900-3903 ft.



Mainly fragments of quartzite and other kinds of material like

samples at 3900-3905 ft.



Ordovician

. Middle Ordovician Series

The top of the weathered ( ?) Paleozoic is placed at 3911 ft. on

the basis of.electric log correlation.

'-

3912

Bit sample. Red and gray mottled irregularly silty shale, and frag-

ments of quartzite.

3912-3916 T.D. Core. Recovery?

'

Top 3 in. Quartzite, light-green, very fine grained.

Bottom. Shale, dull reddish-brown, thinly laminated, micaceous,:

somewhat silty.

~- -- ~

ECHOLS COUNTY

.. . ;, ~

Operator: Hunt Oif Company

GGS. No. l69

Landowner: Superior Pine Products Co. Elevation: 142 ft. (~errlck

Well 2



floor)

Location: Land District 13, Land Lot Total depth: . 4062 ft.-; . 317-;-..southwest corner of Land Lot. Completed: Apr. 7, 1945.
317

S~mary. of Stratigraphy Tertiary

Depth (feet)

Thickness (feet) . ...t

Not studied

Cretaceous Gulf

Lawson Limestone ( ?) upper member('?) --------- 2700? Beds of Taylor age (1st sample 2890) __________:___ 2785?
Beds of Austin age -----------------------------------~------ 3070 Atkinson . Formation, upper member_____________:.________ 3460
lower member___________-_____:_ 3578

28855?J
390 118 : 152

Ordovician :

to Lower Ordovician1 quartzitic sandstone and shale ____ 3770? total 292?

depth .

Lithologic and paleontologic description of cut-

tings and cores. Samples. are cuttings unless

otherwise stated.



1 Bridge. Josiah, and Berdan, J. M ., 1951, U.S. Geological Survey open-file report, p, 6 and tnap.
,.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

167

Depth (feet)
0-2890

Description
Samples not studied.

2785( ?) 2890-2900
2900-2920 2920-2930 2930-2940 2940-2950 2950-2960 2960-2970
2980-2990 2990-3000
. 3000-30~0
3020-3030 3030-3070
3070-3080

Cretaceous

Gulf Series

Lawson Limestone(?) Upper Member(?) (electric. log correlation)

Beds of Taylor age. (electric log correlation)

Chalk, white, containing fragments of Inoceramus and other

macrofossils, and a few specimens of ostracodes. Specimens of

Foraminifera, if present, are i.ndistinguishable 'owing .to insuf-

fiCient preparation of sample.



Like sample at 2890-2900 fi:

Chalk, like sample at 2890-2900 ft. and a few fragments of lighttan, ha'r'd cryptocrystalline lime~tone. Inoc eramus fragments are common.

Like sample at 2920-2930 ft., and a few fragments of a large

Ostrea-like bivalve.

'

Chalk, many fragments of hard, light-tan limestone, and a feyt fragments of light .'olive-gray chalk; InoceTamus fragments common.

Limestone, light-tan, hard, about 50 percent of sample.

Limestone, like sample at 2950-2960 ft. about 50 percent of sample;
about 50 percent light greenish-gray chalk, a little white chalk,
many fragments of Inoceramus, and a few fragments of other
fossil bivalves.

Chalk, about 75 percent of sample; light-tan, hard limestone about 25 percent.

Sample is chiefly cavings from beds. of Eocene age and higher levels.

Marl, light greenish-gray, chalky, and a few fragments of lighttan, hard, limestone; many fragments of Inoc eramus, and some cavings.

No change.

Chalk, light-gray, marly, and cavings ( ?) of white chalk and lighttan limestone; many Inoceramus fragments.

No change.

Beds of Austin age

(Southeastern Geological Society, Mesozoic Committee, 1949, Cross

Section CCi)



Chalk, light-gray and many cavings.

168
Depth (feet)
3080-3090
3090-3100 3100-3110
3110-3120 3120-3130
3130~3140
3140-3150 3150-3300 3300-3310 3310-3350 .3350-3360 3360-3370
3370-3390 3390-3400
..; .
3490-3410 3410-3420 3420-3430
3430-3440 3440-3450
3450-3460

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Chalk, light greenish-gray, and darker gray. chalky ~arl':. ~ Inoceramus fragments ana prisms common; specimens of Globotruncana marginata, Planulina austin-iana, and other species of
Foraminifera.

Like the sample at 3080-3090' ft.

Chalk, light greenish-gray, and darker gray chalky marl. Inocer-

amus fragments common, specimen"s of several species of ostra-

codes, and specimens of Foramin'ifera: Globotruncana margi-

nata, Globigerina sp., Planulina austiniana, and Marginulina

austiniana.



"

' -

Like sample at 3100-3iiO ft., and a few fragments of fish bones.

N,o ch~nge.

t

'i , ~ ~

L " ' ~:~~

Marl, greeni'sh-gray, and material and fauna like sample at 31003110 ft. Highest occurrence of specimens 9f .Citharina texana.

Like sample at 3131-3l40 ft. '' -': ..
c
No change. . Like samples at .3130-3140 ft. and 'bel~w. l The dominant"species of

For-aminifera are Gumbelina r eussi an.d 'Globigerina sp.

No ~hange.

No change. Fauna contains specimens :of . Massizina sp., .indica-

tive of the lower part of t!le beds of Austin age.

_

Marl greenish-gray; like the preceding samples, containing fragments of In~ceramus, and specimens of Foraminifera, mainly

Globigerina sp. and Gumbelina_sp.

. ,

No change.

Like preceding samples . ~~gin~fng .at 1i30-~140 ft.; contains in

addition, many cuttings oi dark-gray ' marl and dark brownish-
gray, light-speckled marl. The speckled ,a~pearance is caused

by crushed microfossil debris. Fish scales are common in the

speckled' marl. '

.

' '

Marl, chiefly gray-gree~, and fragmentS of brOWnish-gray speckled

marl; many cavings.

.



.. ~. >

Like sample at 3400-3410 ft.

Like

the

sample

at

3400-3410

f t .,

and

y,
mimy

-
cuttings

;

'
of



~ream,

' chalky, highly microfossiliferous limestone ~ontaining abundant

comminuted calcitic molds of small specimens of Gum.belina sp.

and Globigerina sp. Sample also contains hr.oceraniU.S prisms

and fish scales.

.

'" .. :

Like the sample at 3420-3430, and .many caVings.
Mainly fragment~ of greenish-gray marl, ~nd a ' few frakment~ - of

highly microfossiliferous chalky limestone. Many cavings from

much higher depths.

~



.Like the sample at 3440-3450 ft. --A few fragmel)tS of the highly

microfossiliferous chalk contain sandy areas.

'

j " - .......
-~~, ~~
... ..
'.,

.'

.it J

. . au . I .4 .1&.LJ .2,I Lsc..

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

169

Depth (feet)

Description
Atkinson Formation. Upper Member.

3460-3470

Sandstone, fine-grained, angular, clear quartz, containing glauconite, phosphatic nodules, mica and pyrite, is 'about 50 percent of the sample. The sandstone also contains fragments of fossil bivalves. Cavings are about 50 percent of the sample.

3470-3480

Sandstone, like the sample at 3460-3470 ft., and abundant frag- ments of green, thinly flaky shale. Sample contains a few fragile specimens of Pwnulina eaglefordensis.

3480-3490

Shale, grayish-green, thinly flaky, slightly micaceous, and fragments of very fine and angular grained, micaceous, carbonaceous sandstone that is probably interbedded with the shale.

3490-3500

Shale, like the sample at 3480-3490 ft., and much light-gray, micaceous siltstone that probably occurs as thin lenses in the shale~

3500-3510

Shale, like the sample at 3480-3490 ft., and a little siltstone.

3510-3520

Shale, about 75 percent of sample; soft micaceous 'siltstone about . 25 percent.

3520-3530

No change.

3530-3540

Shale, gray-green, micaceous; J!lso a little soft.micaceous siltstone, and very fine grained sandstone, both of which are slightly carbonaceous.

3540-3550 Like the sample at 3530-3540 ft. The shale is more micaceous, and J is slightly carbonaceous.

-;

3550-3560 Like the sample at 3540-3550 ft. The shale contains small, crushed,

chalky fragments of fossil shells; ~ few specime~s of flanulina

eaglefordensis, and very small irregular-shaped nodules of sider-

ite.

3560-3570 \ , ,
3570-3580 ,__...

Material like the sampl'e at 3550-3560; but contains no determina-

1 , ble f?.ssils; R.ed~ish-b~own, irregula~-~hap~~ nodules of . siderit~e_

are common m some .fragments.. o~ siltstone.



Like the sampl~ at 3560-S570 ft.' . ''

"'

. ... , }-- "":

AtkinS.OO: Formatio~. ' t~~er Mem~r.

3580-3590 . Like the sample at 3560-3570 ft. The shale contains a few molds .>. <- ''' " of macrofossils and 'fragments of fish bones. The top of the
lower member of the 'Atkinson Formation is placed at 3578 ft. .'-' ~ on the basis of electric log correlation. Jj::arlier workers reported .
a microfauna c'haracteristic of , the lower Atkinson at the depth of 3778 ft., but at the 'time of this study, the samples contained no fossils.

3590-3600

Mainly shale and a little siltstone; no identifiable microfossils or. macrofossils.

3603-3623

Core. Recovery ? Top. Sandstone, brownish-gray, hard, calcareous, argillaceous, slightly glauconitic; sample is, in part, a nodular(?) .sandy limestone.

170
Depth (feet)

3620-3630 3623-3642
3630-3640 3640-3650
3650-3660 3660-3670
3670-3680 3680-3690
3690-3700
3700-3710 3710-3720
3720-3730
.. . :., 1 .. , .r . .. ; . '-.
3730-3740 '
3740-3750 3750-3760

3760-3770

3770-3780 .

. . '

'

3780-3840 3845-3856

3840-3850

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description
Middle. Sandstone, ~an-gray, moderately hard, highly argillaceous, glauconitic, somewhat micaceous. Bottom. Sandstone, gray, soft, fine-grained, highly argillaceous, micaceous, glauconitic.
Like cuttings at 3590-3600 ft. Core. Recovery 4 ft.
Top. Clay, gray, silty, highly micaceous, slightly glauconitic. Bottom. Like top part of core, but slightly carbonaceous. No change in cuttings. No change. A few specimens of Planulina eaglefordensis, and a small Gumbelina sp.
No change. No determinable fossils. Shale and a little micaceous siltstone; also many fragments of
moderately soft, moderately fine-grained sandstone.
No sample? Sandstone, poorly sorted, fine to coarse-grained; green-tinted
grains common. Sandstone, moderately fine to coarse-grained, slightly argillaceous,
somewhat glauconitic, about 50 percent of sample; 50 percent grayish-green shale. ~ainly flaky gray-green shale; a little sand and sandstone. Sand, fine to coarse-grained, and soft sandstone 50 percent of sample; green-tinted grains common; a little feldspar. Like th~ sample at 3710-3720 ft.

r...:
.' l; -~

Ordovician

, Lower Ordovician Series

Like sample at 3710-3720 fr and many fragments' of light to dark-

red :fine-grained quartzite.

. ...:rj

No change.

;.

Quartzite, red to light-pink, fine-grained, and moderately hard sandstone. In addition~ the sample contains many cavings of grayish-green, flaky; micaceous shale, and ; gray, micace{)u:;;, iJ:.~; regularly carbonaceous : siltstone and very ' fine g:r:ained. sand~
stone.

Like the sample at 3750-3760 ft., but :very little quartzite. ,_.

Shale and sandstone, like the sainples froni the Atkinson Forma-

tion; very little quartzite.

' .

Like the sample at 3770-3780 ft.

Core. Recovery 4 ft.

Sandstone, quartzitic, dense light gree.nish-gray, fine-grained,

irregularly highly micaceous.

Sandstone; qtiartzitic, light greenish-gray, micaceous, like core at

is 3845-3855 ft., about 50 percent of sample. The remainder o{

(I

the sample is mainly. cavings.

.

~

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

171

D epth (feet)

Description

3850-3900

Like sample at 3840-3850 ft.

3900-3910

Sandstone, dense, light-green, very fine grained, micaceous; a few fragments of red quartzite, and cavings from the upper Atkinson.

3910-3980

No change.

3980-3990

Like the samples f1om 3900 to 3980 ft. , with the addition of a few

fragments of red and reddish-brown quartzite.



3990-4062 T.D. No change.

ECHOLS COUNTY

Operator: Humble Oil & Refining Co.
Landowner: Bennett and Langsdale Well 1
Location: Land District 12, Land Lot 146; 660 ft. south and 666 ft. east of northwest corner of Land Lot 146

GGS. No. 189
.Elevation: 181 ft. (derrick floor)
Total depth: 4185 ft. Completed: May 6,'1949

Summary of Stratigraphy

Tertiary Paleocene
In beds containing Tamesi fauna; 1st sample 2700 ft. ----~------------~--~----~-~------------

Depth (feet)
?

Thickness (feet)
?

Cretaceous

Gulf

Beds of Taylor age -------------------~-~~-------!_________________________ 2810

240

Beds of Austin age _ _________:_____________________ 3050

290

Atkinson Formation, tipper member_ _ __________ 3340

210

;J. :..,

lower . member_~---: -----~-- . 3550

210

Comanche undifferentiated ,. -"------C__.______:_~--~-----------::________ 3760

360

SUurian

~Qpper

Siluria_n1

q~artzitic sandston~

____7_------------~--

to 4120. total

65

..,. .. ,, _

, .

.

depth

. }:..~

Di3.base intrusion2 ---------:--- -----:----- 4125-4150



'i

.

.

'Bridge, Josiah ; and B erdan, J . M. 1951, :U.S. Geological Survey open-file report, p. 7 and m&p ,

tentatively classified the age of the quartzitic s andstone and da.rk shale as Early Ordovician. J. M. Sehopf (written communication to J . M. Berdan, February 19 59 ; written communication

to P . L. Applin, July 1963), U .S. Geological Survey, classified the age o! the r ock s as Silurian on the basis of "acid resistant" m icrofossils in the sample at 41 7 1 ft.

2Applin, P. i..., 19 51, U .S. Geological Survey Circular 91,_ p. 1 5 -16, and table 4.
,__ _ _191>7, Geological Society of America Bulletin v. 68, p. 1486- 1 489.

/

172

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 ,

Lithologic and paleontologic descriptions of cuttings- and cores. Samples are cuttings unless otherwise stated.

Depth (feet)
0-2700

Description
Samples not studied.

2700-2705 2705-2710
2710-2740 2745-2790 2790-2795
2795-2810

Tertiary

In Paleocene Series Beds. containing Tamest fauna

Marl, light-gray, chalky, highly silty, glauconitic, about 50 percent of sample. Fragments o{ grayish-green shale.

Mainly silty marl, like sample at 2700-2705 ft., and. fragments of hard gray limestone that is probably lenticular in the silty marl. The fauna includes specimens of ostracodes and specimens of the small foraminifer Globigerina triloculinoid.es; also specimens of Cibicides sp., Globorotilia velascoensis, and a small Robulus sp.

Like the sample at 2705-2710 ft., but showing an increase of limestone fragments. No marked change in fauna..

No change in material.

Shale, gray, soft, silty, glauconitic, is probably drilled at this level.

The microfauna in the .samples at 2745-2790 ft. and 2790-2795

ft. includes specimens of Spiroplectammina mexiaensis, Mars-

sonella oxycona, Robulus midwayensis, No.dooaria affinis, Cibi-

cides alleni, Ancrmalina acuta, and .Globigerina pseudobulloides.

No change.

' .

<, )
x"~"

Cretaceotis

Gulf Series

'r
; .:U

~ t- .

Beds of Taylor age .. . ,

~ ~
.
1

28i0-2815 v .;Lfmestone, white, hard, chalky, glauconitic, somewhat sandy (very
!r . $-' fine-grained sand); sample contains 'fragm~nts of lnocll'Yamus,

and cavings from higher levels. The fauna contains specimens

...
I! . . (

of Globt>truncana ma'rginata; Marssonella .oxycona, Planulina

dumblei, Stensiaina ame.r.ic.a.n.. a,,, .and-,.o. thers. ,. . ' . .

. ~

2815-2820''1~ .

Chalk, white, hard, somewhat glauconitic; many fragments of Inoceramus, other fossil bivalves, and echinoids. Microfauna as



1

'

'

i

n

sample

at

2810-2815

ft:;

many

specimens

of

Planulina

dumb lei.

2820-2825 2820-2825

Chalk, white, moderately soft; many Int>ceramus fragments; and microfauna as in the samples beginning at 2810 f.t.
Chalk, white, moderately .soft; many Inoc~Wamus fragments,. and microfauna as in the samples beginning at 2810 'ft.

2825-2855

No change.

LOGS OF SELECTED WELLS IN-THE' COASTAL PLAIN OF GEORGIA

173

Depth (feet)

. Description

2855-2860

...

J, : .

'

"' ,

2860c2865

Washed residue, smaU, probablY. from a soft white chalk, contain-

ing fragments of green shale (caving?), abundant Inoceramus

fragments and ,prisms. Microfauna shrtilar to preceding : Cre-

taceous samples: Pla.nulincidumb lei (common), and many~ speci-

mens of Litiwla ti:iylorensis (highest occurrence).

Material and fauna is similar to the s~mple at 2855-2860 ft., but

sample contains few fragments of Lituola sp.

' '

. 2865-2900 . No change.

2900-2905

.. ';

:.h ~

,::.

.- -~

Chalk, white, also fragments of hard gniy limestone and soft gray

marl that are probably caving. The fauna contains fragments

of Inoceramus, specimens of Lituola taylorensis and other species

as in the preceding cretaceous samples; and specimens of several

species of ost~acodes.

.

2905-3910

Material and fauna like sample at 2900-2905 ft.; libout 25 percent .. of the washed sample. is composed of fine to coar'se~grained
quartz sand (from drilling mud?).

2910-2915 - ; 2915-2920 .
.1':" 'i' , 1' .,.
,,J11
2920~2925

Like sample at 2905-2910 ft., but with about 50 percenLsand.. .
Marl, gray, soft, cavings from higher levels, abundant fragril~nts of Inoceramus, and speciinehs oi Foraminifera that are mainly, ' Planulina d~l:inbl~i, Gl~botruncanii' ~etacea, and a few fragments
of Lituola tiiywrensis. ; ..,... : .
Like sample ai 2915-2920 ft. and a few fragments of Kyphopyxa christneri.

2925-2945 2945-2950

Material and fauna like samples at 2920-2925 ft. Washed residue, s~all . P~obably from a soft gray marl, containing
Inoceramus fragments, speciine~s of Foraminifera (Globotruncana sp. fairly common), and many small nodules of pyrite.

2950-2955


Like sample at 2945-2950 ft. Specimens of Robulus sp. and Globotruncana sp: a:re dominant in the fauna, . which contains, . also, specimens of Marginulina austiniana:

. 2955-:!"9'65

No change.

2965-2970

'Material and fauna as in immediately preceding samples; also a few specimens of Pseudogaudryinella capitosa.

2970-2975 . 2975-2980'

Like sample at 2965-2970 ft.
Marl, gray, containin.g small nodules of pyrite, abundant Inoceramus f~agments, and specimens of Foraminifera, among which Globotruncana sp. and Robulus sp. are common.

2~80-2990

No change. ..

2990-2995 - Material and fauna like sample at 2975-2980 ft., with the addition

s: of specimens of Citharina wadei.



29_..9,.,5.. ~~3000 '
3
3000-3050

Like sanipie at' 2990-2995 ft. but specimens of Citharina wadei ~,., absent. :spe'cimens of Marginulina .il.ustiniana and Globigerina

sp; fairiy common.



Like ~ample at 2995-.3000 ft. and abu1_1dant cavings. ,..

~

. .. t ~~

. ....... . ;.~

_174

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description
Beds of Austin age

3050-3060

Chalk, white, moderately hard; many fragments contain much very fine calcitic material, and abundant specimens of Oligostegina, characteristic. of the beds'of Austin age. Nodules of pyrite and fragments of Inoceramus are common.

3060-3070 No change.

3070-3075

Marl, brownish-gray, soft, is probably drilled at this level. Sample

contains many Inoceramus fragments, nodules of crystalline

pyrite, and cavings. Among the indigenous specimens of Fora-

minifera, GlobotTuncana marginata and Globigerina sp. -are

dominant; Planulina austiniana and Gumbelina reussi are fairly c'ommoit; specim~ns of Valvulineria infrequens (Austin var.)

are present.





3075-3080

Like the sample at 3070-3075 ft., also fragmen~s of Citkwrina texana.

3080-3085

Not described.

3085-3090

Clay, gray, marly; contains many Inoceramus fragments . and prisms, nodules of crystalline pyrite, and specimens of species of Foraminifera characteristic of .the beds of Austin age.

3090-3100

Clay, gray, marly; contains a few Inoceramus fragments, nodules of' pyrite, specimens of Foraminifera, and many _ostracodes. ,

3100-3125

No change.

3125-3130

Clay, gray, marly; contains Ini>ceramus fragments and nodules of pyrite. Specimens of Gumbe'lina sp. and Globige1-ina sp. are dominant' in the microfauna, which also contains many specimens of. Globotruncana sp.. and a small A nmnalina sp.

3130-3230 No change.

3230-3235 3235-3240

.Washed I'esidue, small. Contains fragments of gray marly clay,

Inoceramus fragments, nbdules of pyrite, and a few small frag-

ments of dark brownish-gray slightly speckled, marly shale. The,

microfauna

is

like
.

that

in

the

sample ' "'

at

3125-3i30
.

ft.

.

Two separate .samples at this depth.

a. Like sample at 3230-3235 ft.

-r



.

-t

b. Like sample at 3230-3235 ft., with the addition of many frag-

ments of gray,. hard, sandy (fine-grained sand) limestone,

and fragments of Ostr~a-Iike bivalves.

:!. '

3240-3250

Materials and fauna like sample at 3230-3235 ft;

3250-3255 3255-3265

Core 4. Recovery 4 ft.

Top. Clay, light-gray, marly slightly micaceous. Washed residue

is small and consists of specimens of Gumbelina sp. and Globi-

gerina sp.,_many specimens of Globotruncana marginata, Planu-

lina austiniana (sinal!), and Virgulina tegulata; a few speci-

mens of ostracodes, including Cythereis dallasensis.

Core 5. Re~'~very 3 ft.

.

Clay, brownish-gray, marly, light~speckled. '.l,'he fauna consists

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

175

Depth (feet)

De8cription

of a few fish scales, and specimens of Foraminifera and Ostracoda like sampie at 3250-3255 ft.

3265-32'(0

Core 6. Recovery 4 ft. . Top. Chalk, light-gray, moderately hard. The fauna consists of specimens of Foraminifera and Ostracoda like sample at 32503255 ft., with the addition of specimens of Oitharina texana.'

Bottom.- Like top part of core, but no C. texana.

3270-3280

Core 7. Recovery 5 ft. Top. Marl, gray (darker gray than preceding cores), light speckled. No change_.in fauna.

' ~ :r
3280-3285

Bottom No change.
Core 8. Recovery 5 ft. Top. Marl, gray arid brownish-gray, light speckled. No change in fauna.

Bottom. Marl, gray, soft. No change .in. fauna.

3285-3295

Core 9. Recovery 4 ft. . > Top. Chalk, white, moderately h;1rd; few specimens of Fora-
minifera wash free.

1~ _ -,. -

. t

Bottom. Mar:!, dark-gray, highly light-speckled. . Microfauna like

the preceding core samples.



3295-3300

Core 10. Recovery 9 ft. Top. Chalk, white, moderately hard. No change in fauna.

Middle. Like top of core.

Bottom. Marl, gray and brownish-gray, speckled; contains thin hard lenses composed of masses of calcitized microfossils and microfossil fragments; no change in fauna.

3300-3310

Core 11. Recovery 10 ft. Top 3ft. Marl, dark brownish-gray, speckled, highly pyritic. No change in fauna.

2nd 3 ft. Chalk, light-gray, moderately hard; contains much calcitized microfossiliferous material (Inoceramus prisms and . specimens of Foraminifera). Globigerina sp. and Gumbelina sp. very abundant; also many speCimens of Globotruncana sp. typical of the lower part of the Austin chalk.

3d 3 ft:Chalk, white, moderately hard, similar in general character and fauna to the 2nd 3 ft.

Bottom 1 ft. No change.

, (jlay, gray; calcareous, and speckled marl. Sample contains many

. . ' t -: ,

Inoceramus fragments, nodules of pyrite, and specimens of Foraminifera like the preceding cores; also a few specimens

caving from higher levels.

3320-332!)

Material and fauna like sample at 3310-3320 ft.; also a few frag. ments of very fine grained, somewhat glauconitic, calcareous
sandstone that contains specimens of many small foraminiferal species like those mentioned in preceding cores.

176

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 .

Depth (feet)

Description

3320-333().!
.

, Cor~-:13. Recovery 10 ft.

, .~

Top 1 ft. Clay, shaly-, gray, soft, silty. Sample contains small

nodules of glauconite, a few nodules of pyrite, and many speci-'. . mens of Foraminifera. Specimen's of . a s~all Globigerina sp.

. and a small Planulina sp. are common; specimens of Gumbelina .,., . sp. are in th_e fauna, though not abunda~t: ,.

2nd 2 ft. l)iarl, gray, containing a .very large amount of Inoceramus prisms and calcitized molds of specimens of Foramini-. fera. Common forms are: Globigerina sp., Globotruncana sp. (lower Austin form); G~mb.eliM sp.; a)ld a few Planulina sp., like the top part of the core.

3d 4 ft. Marl, light-gray, chalky, like the preceding part of the

core in character a~d fau,na.

.

1

"' \ , _ \ )


- Bottom 3 ft. M~rl,' g;~y, highly microfossliiferous, somewhat ~~..._

white speckled. N'o .change in faun,a.



3330-3340

Core 14. Recovery 10 ft.

;.: -

. Top

5

ft. . Marl,

gray. ,

soft.

Fauna ';:

c~' mp~sed.

of

Inoceramus

prisms and specimens of G?obigerina sp. and Gumbelina sp. .

2nd 4 ft. Marl, gray, sandy (medium~grained to moderately .,... coarse-grained' sand)'. Phosphatized fragments of fish bon~s
of common. Washed residue large; composed 50 percent sand

and 50 percent Inoceramus prisms and speCimens of Foramini-

fera. Fauna like core 13- at 3320-3330. ft., and a 'few: specimens

, of Planulina eaglefordensis and.Cythere.is eaglefO'i-denBis.

Atkinson F'Ormation. Up~r Menibe;.

3340-3345
i-
- .
. '
3345-3350

Bottom 1 ft. Marl, gray, .soft, sandy, like top part of core, and

gray, hard, sparsely sandy'limestone containing fragments of fos-

sil .bivalves. The limestone marks the top of the upper member

of the Atkinson Formation.



L

-. Core 15. Recovery 4 ft. Top 2 ft. Sandstone, white, hard, fine to medium-grained, calcareous, highly pyritic; contains phosphatic fragments and fragments of fossil bivalves.

2nd 1 ft. Sandstone; white, hard, medium to coarse-grained, calcareous, pyritic;- contains fragments of phosphatized fish bones, and fragments of fossil bivalves..

Bottom 1 ft. Sandstone, light-gt~y:, hard, . calcareous, very fine

. grained, and sandy limestone, containing many shell fragw.ents,

. a little pho-sphatic material, a trace of fine-grained, bright-

green glauconite, a trace of mica, and a few specimens of ostra-

codes,



Core 16. Recovery. 3 ft. Top 1,2 ft. Siltstone, light-gray; moderately soft, micaceous, slightly glauconitic; contains fragments of Ostrea. sp. (common), and fragments of phosphatized fish bones. Washed resi- due contains much fine to medium-grained qtil:irtz sand.

~

r

LoGs OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

177

Depth (feet)

Description .

2nd 1h ft. Sandstone, light-gray, hard, calcareous, and sandy ' limestone; contains abundant shell frai;ments, and. is irregularly micaceous and somewhat phosphatic.

Bottom 2 ft. Sandstone, light-gray, fine-grained; calcareous, micaceous; contains many shell. fragments and phosphatized fragments of fish bones.

3350-3355

Core 17. Recovery 2 ft. Top .! ft. Shale, gray-green, flaky, slightly si-lty; contains phosphat~c fragments, shell fragments, and a few specimens of ostracodes.

Bottom 1.! ft. Siltstone, light-gray, soft, micaceous, calcareous; contains fairly common specimens of several species of ostracodes, and specimens of Valvulineria infrequens (Eagle Ford variety) , and of a very small Gumbelina sp. .

3358-3362

Core 19. Recovery? Washed sample is .very fine grained sandstone and a few shell fragments. .

3362-3367

Core 20. Recovery 5.! ft. . Top. Sand, fine to medium-grained quartz; containing many worn and broken shell fragments, a few phosphatic nodules, and a few specimens of ostracodes.

Bottom. Sandstone, fine to medium-grained, soft, quartz, con~aining many worn and broken shell fragments (Ostrea? sp.),
pyrite, a trace of glauconit~, mica and phosphatic material.

3367-3372

Core 21. Recovery 5 ft. Top. Clay, light greenish-gray, soft, sandy, micaceous; contains a few shell fragments and phosphatic nodules.

Bottom. Shale, greenish-gray, soft,. sandy (fine-grained sand), .slightly glauconitic. '

'3372-3377 .

Core 22. Recovery 5 ft. Top. Like bottom part of Core _21 at 3367-3372 ft.

Bottom, Clay, light greenish-gray, sandy (fine to medium;k grained sand), micaceous, slightly glauconitic, somewhat phos~
phatic.

3375-3380
,.

Sand, light-gray, fine-grained, and shale; contains many shell
fragments, many bryozoan fragments, specimens of Foraminif~ra from younger beds, a few fragments of light-green shale, and a little glauconite.

3380-3390 No change.

3390-3395 _,

Like sample at 3375-3380 ft. The microfauna contains specimens of F~raminifera that have caved from various levels, but also contains specimens of species that are typical of the upper mem-
ber of the Atkinson Formation. Common species are: Giimbelina sp. (small), Valv11lineria infrequens (Eagle Ford variety), and small specimens of Planulina: eaglefordensis.

3395-3400 Like sample at 3390-3395 ft. Sample composed, mainly, of frag-

..~..

178
Depth (feet) -
3400-3420 3420-3425 3425-3430 3430-3435
3435-3475 3475-3480
3480-3500 3500-3505
3505-3555

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
ments of O!ftrea sp., bryozoan fragments, a few fragments of fine-grained, micaceous sandstone, and a few specimens of Foraminifera caving from the beds of Austin age. No change. Sample composed of shell fragm ents, bryozoan fragments, loose sand, and micaceous sandstone; also many fragments of white, sandy limestone, containing many embedded shell fragments. - Like the sample at 3420-3425 ft. -
Dominant materials in the sample are about 50 percent fine to
moderately coarse grained sand, and fragments of white, irregularly sandy, macrofossiliferous limestone reported in the sample at 3420-3425 ft. Sample also contains bryozoan fragments, shell fragments, phosphatic nodules, and a -few fragments of sandstone. No change.
Like sample at 3430-3435 ft., but fragments of white, fine to
medium-grained, glauconitic, micaceous sandstone are slightly more common. Sample also contains a few fragments of flaky green shale. No change.
Sandstone, white, medium-grained, calcareous, somewhat glauconitic and - phosphatic; contains many fragments .of Ostrea sp. a,nd a small Gryphea. Loose sand and shell fragments compose about 75 percent of the sample.
No change.

3555-3560 3560-3570 3570-3575 3575-3580
3580-3585

Atkinson Formation. Lower Member.
The top of the lower member .of the Atkinson Formation is pl~ced at 3550 ft. on the basis of electric log correlation supported by -the samples.
Sample is composed mainly of loose sand and abundant shell fragments, but also contains many fragments of light-tan, hard, sandy limestone in which shell fragments are embedded.
No change. Washed sample, composed m~inly of sand and -shell fragments. Washed sample, small; composed of fragments of gray, micaceous
siltstone ; fragments of the sandy; fossiliferous limestone reported in sample at 3555-3560 ft.; -a little loose sand; and .phos- phatic nodules. The material drilled at this level is probably siltstone and soft, greenish-gray shale, a few fragments of which are in the sample.
The sample contains specimens of arenaceous species of Foraminifera, among which are specimens of Ammobac!tfites stephen8oni. No change.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

179

Depth (feet)
3585-3590 3590-3595 3595-3605 3605-3610 3610-3620 3620-3625 3625-3630 3630-3660 3660-3665 3665-3670
3670-3680

Description

No change in material, but no specimens of arenaceous Foramini-

fera observed.



No change in material but contains specimens of Ammobaculites stephensoni; specimens of Planulina eaglefordensis, and some other species that are probably caving from higher levels.

No change.
Washed sample, small; comp~sed (,If fragments of grayish-green shale, a little loose sand, and a few shell fragments. The microfauna contains specimens of Ammobaculoides plummerae and Ammobaculites advuntts.
No change.

Washed sample, small; composed of greenish-gray and light-brown, somewhat micaceous shale. Shell fragments and sparse specimens of Foraminifera are probably caving.

Material like sample at 3620-3625 ft.; specimens of Foraminifera like sample at 3605-3610 ft.

No change.

Core 23. Recovery 1 ft. Shale, olive-gray, flaky, slightly micaceous; contains a few small reddish-brown, irregular-shaped nodules of siderite, and a few specimens of Ostracodes.

Core 24. Recovery 5 ft. Top 1 ft. Shale, gray, flaky, containing irregular streaks of light-gray, micaceous silt.

2nd 1 ft. Material like top 1 ft.

Washed residue, small; composed of fragments of shale and siltstone, and abundant small, irregular-shaped nodules of siderite. The microfauna contains specimens of Ammobaoulites comprimatus, Trochwmmina rainwateri, specimens of small Globigerina sp., small Planulina sp. (related to P. eaglefordensis), and small Gu1nb elina sp.

3d 1 ft. Shale, olive-gray, micaceous, and a little siltstone, containing a few small irregular-shaped nodules of siderite, a few comatulid fragments, and specimens of Foraminifera like preceding part of core.
4th i ft. Shale, gray, slightly micaceous, containing a few silty
areas. No change in microfauna.

Bottom 1 ft. No change.

. \

.

Core 25. Recovery 10 ft.

. Top 3 .! ft. Shale, gray, micaceous; almost no washed residue.

Middle 3.! ft. Shale, like top part of core, and a little siltstone. Fauna like core 24 at 3665-3670., and in addition, many speci- mens of Ammobacltloidcs plumme1ae. Bottom 3 ft. Unaccounted for.

-~ :.;.... 180
Depth (feet)
3680-3690 3690-3700
3700-3710

GEORGIA GEOLOGICAL." SURVEY BULLETIN 74

Description

Core 26. Recovery 10 ft. Top 1ft. Shale, gray, flaky.

2nd 1 ft. Shale, gray, micaceous, somewhat carbonaceous, containing lenses of siltstone and very fine grained micaceous sandstone.

3d 2 ft( ?) No sample?

4th 4 ft. Shale, gray.

Bottom 2 ft. Shale, gray, flaky, containing. lenses of light-gray, micaceous siltstone. The shale contains scattered specimens of very minute dwarf speci,es of Foraminifera.

Core 27. Recovery 10 ft.

Top 1ft. Shale, gray, and gray, hard, silty clay. Washed sample.. -,

Sand, fine to coarse-grained, quartz, worn and broken shell frag2. .'-

ments, and phosphatized bone fragments.

'""';.,

2nd 2 ft: Sandstone, gray, very fine grained, calcareous, mica. ,. caceous, slightly glauconitic, containing abundant specimens of
small Gumbelina sp. and small Planulind sp., a few specimens of ostracodes, and small fragments of shells. Thin. lenses of gray shale contain specimens of A1nmobaculites agrestis, and two species of Gii1nbelina.

3d 2 ft. Sandstone, very fine-grained, calcareous, micaceous, slightly glauconitic, containing shell fragments , and phosphatic material.

4th 3ft. Clay, gray, sandy (fine-grained sand). Washed sample. Sand, fine-grained, containing many shell fragments, echinoid spines, nodules of pyrite, and many specimens of species of Foraminifera characteristic of the so-called "Barlow" faunal. Common species are: Ammobacul:ites agrestis, A. advenus. Haplaphragmoides langsdalensis,; Trochammina rainwateri, Citharina kochi, Placopsilina langsdalerz,sis, Quinqueloculina lirelldngula, Marsonella cf. M. ellisorae, Ammobaculites junceus, Globigerina sp., Nodosaria sp., Discorbis cf. D. minima; several species of ostracodes also common

Bottom 2 ft. Siltstone, gray, micaceous; .gray; micaceous shale; soft, argillaceous, medium t;; ~oarse-grained sandstone; a-little glauconite; a few fragments of worn shells; .a few phosphatic
nodules. The lenses of shale contain many small, irregularshaped nodules of ~iderite and of..glauconite, fine-grained sand, and a few small specimens of Awmobaculites.

Core 28. Recovery 10 ft. Top 3 ft. Shale, gray, slightly micaceous, containing lenses. of gr!J.y, very fine grained, calcareous sandstone. The sandy leri'ses contain the "Bai'low" fauna described in the 4th 3 ft. of Core 27 at 3690-3700 ft., with slight difference in. the species; Globi-

'Applin, E . R., 1956, U.S. Geological Survey, Prot. Paper 264-I, p. 187-197, pis. 48 and 49.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

181

r1~~~

Description

' ' '
'.

gerina sp. is common in this.sample, and AntmobaculO<ides plum-

merae is fairly abundant. .

i

Middle 3 ft~ Shale; gray; lenses of gray; highly sandy (fine-

grained sand), micaceous 'shaie; and of hard, very fine grained,

calcareous sandstone. The sample contains shell fragments; fish

teeth; specimens of several species of ostracodes; inany speci-

mens of Globigerina sp.; and a few .specimens of other species

of Foraminifera common in the "Barlow" fauna.

3d 2 ft. Shale,. gray, containing scattered silty and sandy (very fine grained sand) areas; many small shell fragments; phos' phatized fish bones; a trace of glauconite and mica; many speci. ' mens of Ostracodes; and a few specimens of Globigerina sp. and other Foraminifera common in the ",Barlow" fauna.

Bottom 2 ft. Sandstone, gray, very fine grained, micaceous, argil-

laceous, or highly sandy shale containing thin lenses of light-

gray, hard, fine-grained, calcareous, slightly glauconitic sand-

stone, in which pyritic .areas and .small fragments of carbona-

ceous material are fairly common. Some lenses of shale contain

..:,. a few specimens of ostracodes, small fragments of shells, and

a few specimens of Foraminifera.

3710-3720

Core 29. Reco~ery 3 ft.

Top 2 ft. Limestone, gray, hard, sandy, argillaceous. The sand .

is medium-gra~ned, and seems to be evenly distributed in the

fragments of limestone. Softer parts of the core contain very

i '

fine grained argillaceous sand,' mica, and a little glauconite.

~.
~

Bottom 1 ft. Shale, dark-gray, thinly _laminated.

~:-

3720-3730

Core 30. Recovery 10 ft.

_

~ ' r

Top 2ft. Clay, gray, soft, sandy (fine to mediuxrt-grained sand), micaceous; contains some coarse grains of sand and a few phosphatic nodules.

,,t 2nd 4 ft. Shale, gray, somewhat micaceous and glauconitic; a . few small worn shell fragments.

3d 2 ft. Shale, gray, containing a ;little fine-grained sand and gla~conite. ..

Bottom 2 ft. Clay, gray, soft, highly arenaceous. The sand is fine to very coarse grained quartz, in general, but some gratns are about the size of small pebbles. A few shell fragments and phosphatic"nodules are in the sample.

3730-3740 '

Core 31. Recovery 5 ft. Top 2 ft. Sand, ,gray, soft, .highly argillaceous, containing lenses ''of buff-gray, sandy, slightly glauconitic limestone. The sand is poorly sorted, fine to coarse-grained, and composes about 50 percent of the sample. A few shell fragments are in the sample.

' . Bottom 3 ft. s 'andstOne, gray, highly argillaceous. The sand is fine to very coarse grained; coarse to very coarse grains are common. The sample contains a few shell fragments and a few phosphatic nodules.

182

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

3740-3750

Core 32. Recovery 5 ft. Sandstone, light-gray, soft, argillaceous. The sand is poorly
> sorted, fine to coarse-grained, roughly angular, slightly etched; contains a few pink-tinted grains.

3750-3755

Core 33. Recovery 1 ft.

i '

Top 10 in. Sandstone, light-gray, highly argillaceous, micaceous,

glauconitic, like core 32 at 3740-3750 ft.; contains a few shell

fragments.

Bottom 2 ft. Clay, gray, soft, silty, micaceous.

3755-3765

Core 34. Recovery 11 ft. Top 2 ft. Clay, greenish-gray, irregularly red-streaked, micaceous, sandy (fine to medium-grained sand), and a few fragments of brownish-red waxy shale.

3765-3775
3775-3780 3780-3880 3880-3890 3890-3900 3900-3930 3930-3940 3940-3990 3990-4000

Comanche Series undifferentiated

The top of the Comanche is placed at 3760 ft. on the basis of samples and electric log correlation.

2nd 5~ ft. Clay, dull-red and greenish-gray mottled, waxy, micaceous, highly sandy.

Washed sample contains fragments of gray and dull purplishred sandy clay, and fine to coarse grains of sand washed from the clay; 'also flakes of biotite and muscovite.

Bottom 3.3 ft. Clay, light greenish-gray, waxy, _irregularly ,sandy, micaceous. The clay shows irregularly stained red and mustard-yellow areas probably caused by oxidation of iron minerals.

Core 35. Recovery 8 ft.
Top 4 ft. Sandstone, dull-red, argillaceous, micaceous, moderately coarse grained. The sand grains are roughly angular, etched
quartz and a little feldspar; the mica is biotite and muscovite.
Bottom 4 ft. Clay, dull-r~d and greenish-yellow mottled, silty
to sandy (fine-grained sand), micaceous.

Sand, coarse to very coarse grained, quartz, and a little feldspar; many grains red-tinted.

No change.

Sand, like sample at 3775-3780 ft., and a few fragments of dark-

red clay shale.

'

Sand, very coarse grained, quartz, (many amber-tinted grains), and a little feldspar; a few fragments of red shale.

No change. Sand, very coarse grained, quartz, and feldspar; many 'of the
grains are amber-tinted and pink-tinted; a little mica.

No change.

Sand, fine to very coarse grained, and a little feldspar; many grains are amber-tinted.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

183

Depth (feet)
4000-4010 4010-4020
4020-4120

Description

No change.

Sand, coarse to very coarse grained quartz, and a little feldspar;

many grains are amber-tinted and pink-tinted; also a few frag-

ments of "basement" rocks.

.

Like sample at 4010-4020 ft., and a few fragments of weathered Paleozoic shale.



Silurian

Upper Silurian Series

4120-4127
4130-4135 4135-4140 4140-4145

Sand, like sample at 4020-4120 ft., and fragments of red and gray mottled, thinly laminated shale . that are probably from the weathered surface of the Paleozoic sedimentary rocks.
Cuttings of diabase, and' cavings from higher levels.
Diabase fragments, mainly, and a few fragments of the weathered (?) Palezoic rocks.
Like sample at 4135-4140 ft., 'With the addition of fragments of dark brownish-gray, hard, material (resembles dolomitic limestone) attached to fragments of diabase ; a few fra gments of dark-gray shale (Palezoic).

4145-4150 4150-4155
4155-4160 .
4160-4165
416~-4170

Not described or no sample. Diabase; like preceding samples, many fragments of reddish
(weathered(?) Paleozoic) shale, and a few fragments of black shale (Paleozic). Sandstone, gray, quartzitic, extremely fine-grained, a little black shale, and cavings. Diabase, quartzitic sandstone, and a little black shale. Core 36. Recovery 1 ft. Bottom Ih ft. Quartzite, gray, and thin lenses of black shale.

4170-4185 T.D. Paleozoic sedimentary rocks.

LOWNDES COUNTY*

Owner: U.S. Government . (War
Department) well 3
Location: 3 mi. southeast of Base (Moody Field) at Ordnance Site

, GGS. No. 182
Elevation: 202 ft.
Total Depth : 248 ft. Completed:

I
k.
Publication of this data is authorized by the Sun Oil Company, for whom the report was prepared on a commercial basis..

... t l84

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Summary of Stratigrap.hy Tertiary

Depth (feet)

..
Th iokness ' ' (feetH

Miocene undifferentiated

5

160

lower, Tampa Limestone_____.:________________._~-----. 165

25

Oligocene upper, Suwannee Limestone _________________:_______ ___
. ' ; '.

190 to 15
205 ft.
(last sample)

Lithologic and paleontologic description ' of cut-

tings and cores: Samples are cuttings unless

otherwise stated.



D ep t h ( f ee t )

Description Tertiary

f'
. -~ ...

5 10
.. 15 20 25 30
34 37 45 50
55 60 65 70 75
80 85 90 95 100
105

Miocene Series undifferentiated

. ~

,'(.

Clay; red, highly sandy:

Like sample at 5 ft.

Clay, purplish-red, sandy. ~ ;- . "
Clay, pinkish-tan sandy.

Clay, yellowish-brown, soft, highly sandy.

Sand, clear quartz, iron-stained, coarse; rounded grains. Sample contains. nodules of limonite that were probably embedded in red clay.

Clay, yellowish-tan, highly .sandy (coarse-grained sand). :

' Like ,~ample at 34 ft. ,

Clay, light, yellowish-brown, highly sandy.

Like sample at 45 ft., and many white, moderately soft, polished nodules.

Like sample at 50 ft.

Like sample at 55 f~;, _but much les~. sandy.

Clay, yellowi:;;,h-tan, sandy, sticky.

Clay, light-gray, .sandy (fine-grained.sand).

!...:* J ..,_. ~., ~

' Clay,.cream, highly sandy (very fine-grained sand); ,contaitj.s ~

~ trace of..carbonaceous material. " . H~ . Clay, light-tan, highly sandy, sticky. :

l ,.

' - -

1:,:

.

jJi
:'\.

. ., '}

Clay, white, highly sandy, sticky.

Sand, white, moderately fine-grained, ,argillaceous.
Like sample at 90 ft:

Clay, white, highly sandy; some fragments show dendritic mark-

ings.

Like sample at 100 ft. "J:

. .... .

-- .~

LOGS OF SELECTED WELLS IN THE .COASTAL PLAIN OF GEORGIA

185

Depth (feet)
110 115 120
125 130 135 140
145
150 155 160

Description
Like sample at 100 ft. Clay, white, highly sandy, .sticky. Clay, white, sandy, containing nodules of light-green, unctuous . clay, Sand, clear quartz, containing nodules of white sandy clay. Clay, greenish-white, highly sandy. Clay, white and light-brown, sticky, somewhat sandy. Sand, clear quartz, uneven-grained. The sample contains many
nodules of white clay, and a few worn fragments of shells of fossil bivalves. Sand, clear quartz, uneven-grained, and a few nodules of white sandy clay. Like sample at 145 ft. Like sample at 145 ft., and a f ew cream, sandy, calcareous nodules. Like sample at 155 ft.

165
170 175 180 185 i,) .,
190
195 200 .
205 , (last sample)

Lower Miocene. Tampa Limestone..

Limestone, white, moderately hard, chalky, slightly sandy, containing echinoid fragments, fragments of fossil bivalves and crab claws, and fragmentary sections of Sorites? sp.
Like sample at 165 ft.
Sand, chalky; a small sample.
Limestone, tan, hard,. somewhat sandy.
.. Limestone, reddish-tan, hard, somewhat sandy. Oligifcene Series

Upper Oligocene. Suwannee Limestone

. ,;1 } : ,. ~

~

Limestone, white, moderately hard, chalky; also fragments of tan,

slightly sandy limestone, and a little unconsolidated clear quartz

sand.

Like sample at 190ft~

Limestone, light-cream. The cuttings are nodular, seem to be some. what water-worn, and contain vague traces of impressions of fossil fragments. The sample also contains a few fragments of
partially dolomitized limestOne, and cavings from higher levels.

Limestone, white, hard, containing traces of fossils. The sample also contains fragments of brown dolomitic limestone, cavings
.,. ~ ' .:from higher levels, and a few calcitized specimens of Rotalia Cf.
R. byratnensis.

186

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

MITCHELL COUNTY

'I

Operator: Stanolind Oil '& Gas Co.

GGS. No. 109

I'

Landowner: J. H. Pullen, Well 1

Elevation: 338 ft.

Location: Land District 10, Land Lot Total Depth: 7490 ft.

I. :: _

133, 700 ft. south of north line, and Completed: Aug. 14, 1944

700 ft. west of east line of Land Lot

133

Summary of Stratigraphy

Tertiary

Depth Thickneae

(feet)

(feet)

In Eocene

lower Beds of Wilcox age ; 1st sample 1335 ft.

Paleocene

i.

Clayton Limestone ------------------------------------------------- . 1560

130

Cretaceous

Gulf

Beds of Navarro age ----~------------------ 1690

220

Beds of Taylor age -- - --------- - - ---------- 1910

440

Beds of Austin age -------- - -- ------- - ------- - 2350

480

.' -

Atkinson Formation, upper member___________________ 2830

530

lower member__________________________ 3360

280

Comanche undifferentiated ------------ ------------------- 3640

2580

Triassic(?)

to

Upper Triassic(?)

.

Newark ( ?) Group -------"------:___~:..:.:.__________6220 ( ?) total1270

~,I ...

depth

I -:

' '

Lithologic and paleontologic description of cores

and cuttings. .Samples are cuttings unless other-

- >

::otherwise stated.

\..

Depth (feet)

Description

0-1335

Samples not. studied.

.,

.I :

Tertiary .

--r:l.r

~:

In Eocene

Lower Eocene. Beds of Wilcox age.

1335-1350

Limestone, white, chalky, underlies a sequence of glauconitic 'sand and gray glauconitic cl~y. The sample is probably in the Salt
Mountain Limestone, the top of which is at about 1320 ft. as suggested by the electric ' lbg of the Pullen well. Specim~ns of

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

1St

D epth (feet)
1350-1560

Description
DU3cocyclina weaveri occur in the other samples of the limestone, although none were observed in this sample. Samples not described.

1560-1575 1575-1590 1590-1605 1605-1620
1680-1695

Paleocene

Clayton Limestone

The top of the Clayton Limestone is at about 1560 ft. on the basis of the electric log of the Pullen well. This sample contains the highest occurrence of white, hard, rough-textured limestone.

No samples.

Limestone, white, hard, chalky, and abundant fragments of gray:

ish-brown chert. The sample contains a few specimens of Anoma.-

lina alleni .





Limestone, white, hard, chalky (composed of very small chalky fragments), and abundant fragments of chert. The sample contains some specimens of Foraminifera indicative of the Clayton Limestone. Same to:
Limestone, somewhat sandy (fine-grained sand) and slightly glau~ conitic; chert is abundant. and seems to occur in streaks in the limestone. Specimens of Anomalina vulgaris var., A. a1leni, and other forms typical of the Clayton Limestone are common in the sample. Beds of Midway age seem to overlie the Clayton Limestone, inasmuch as specimens of Vaginulina robusta occur in cavings in this sample.

1695-1710. 1710-1725 1725-1845 1845-1860
1860-1870

Cretaceous
Gulf S~ries
Beds of Navarro age
/
The top of the beds of Navarro .age is placed at 1690 ft. on the basis of lithologic data and electric log characteristics. The high- . est occurrence of spec1mens of Fo~aminifera that definitely indicate the Cretaceous age of the beds is at 1800 ft. The highest oc_currence of Globotrunc_ana area is in the sample at 1815-1830 ft.
Samples not described.
Clay, dark brownish-gray, marly, occurs in this sample and inc~eases in ab~ndance in the samples just below this depth.
Samples not described.
The microfauna in this sample contains specimens of species characteristic of the beds of N avarro age ; Pseudogumb elina costulata, A nomalina pseudopapillosa, Globotruncana cretacea, Pseudoclavulina clavata.
Limestone, light-gray, hard, very finely_glauconitic, sandy (finegrained sand), occurs in this sample and in the sample at 18451860. f t. The microfauna is sparse and Navarro in character.

188
Depth (feet) ~870-1905

GEORGIA GEOLOGICAL SURVEY BULLETiN 74 ,

No change.

Description

Beds of Taylor age

The top of the beds of Taylor age is placed at 1910 ft. on the basis of electric log characteristics.

1905-1920
192.0-1935 1935-1950 1950-1965 ' 1965-1980
1980-1995
1995~2010~, .t
2010-2025

Materials like the sample at ' 1860-1870 ft. The sample contains

,. f one speci~ens of Planutina ~u7r!-bl~ i, many specimens of AnO?n!l_li-

.

.

.
' ~

_no
,..

i

d.

es

pin.gttis. , .and

a

few .f.ragme...n. .ts

Bolivinoides

decorata.

Like sample at 1905-1920 ft., .with the addition of specimens of

. Litu~la taylorensis (co~mon).

.

. ...

l.i. . :1

, ,Like sample at .1920'-1935 ,ft., . and . some fragme~ts of ligJ:lt-green

.bentonite. .



: ''

,,

Sandstone, g~ay, 'hard; fine-gr~ined, calcareou~; specimens of Li-

. tuola taylorensis ar-e common. 'sh~le, gray, composes ~~st ; of a very small sample. The ~ample

... contains some.Inoceramus prisms and a few specimens of Hetero-

. stomella americana.

,.

Likesample at 1965-1980 ft. Fragments 9f In_oc!lra.mus , are com~

mon. The microfauna in.. this:sample contajns specimens o:f spe~ies char-

acteristic of the beds of Taylor age; Planulina te:cana, Gyroidina

. .umbilicata,, Globorotdlites conicus, Bolivina incrassqta; Bullimi-

. 'nella carseyae.

, .

. ...

No sample.

~t{ ~ . i :. . ~-

2025-2040
:2040-2295
:2295-2.~.,10 \ ;
I'

Sample is mainly cavings from higher levels. Some specimens of

StensiOina ameridana.: are . in the sample but these may have

caved, as the specie-s . usually occurs at or near the. top of the

beds of Taylor age. . , .

Samples not de~crfb~d.

J

'

sandston'e, e~tremely fin~-giained, calcareous; micaceous, contain-

ing abundant fragments of Inoceramits, many nodules of pyrite,

and some fragments of gray, micaceous marl. The microfauna is a mixture of.. specimens from several stratigrap~ic units but i~cludes sp~cim~ns pf Planulina taylor<in8is and other Taylor

species.

. -, ,!

''

2325-2370 '

Like .sampleat 2295-2310 ft., but'.marly shale fragments are.domf-

.mint in the relatively sinaU samp]e. The microfauna cont~ins

species of Foraminifera that are characteristic of the b~ds, of

Taylor. age.

. ,

;f .!

Like sarnP.Ie at 2310~2325 ft.

. I

.: ~-

Beds of Austin age

':': \ ~

. . "OfJ '

~-

. .

. , J

.~ ,. . ;':~ .. ..;

.,_,_.. The top of the beds of Austin"age is placed at 2350 ft. on the basis

I ..

, ,1i

of

electric..Jog. correlation.
>

1,

25

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA,

189

,.._.

Depth (feet)

Description

. ...

2370-2385

at. Similar to sample 2310-2325 ft:, but the material is somewhat

harder, more . cl).lca;reou~, and leaves a larger ,,~vashed residue.
is The fau~a also similar to that in the samp~es below 2310 ft.,
but co~tains a f ew. sp~cimens _of Pseudoclav:~lina czavtita and

H eterostomellq. austiniana.

2385-2400 . Like samples at 2370-2385 .ft.; . and containing. Globorotalites um--

' I

...-'f "J bilicatus and Gaudryirni austiniana.

2400-2460 Samples not described.

,

2460-2475

Clay, dark-gray, soft, marly,- containing specimens of Pileudogaudrflinella capitosa, Planulina dumblei, Globotruncana area, and

Globorotalites conicus.

2475-2505

Samples not described.. ., :,

.' " d :.:; .. _ _:

2505-2520' Ciay, dark-gra'y, soft, ma.rly, containing il?ec1meJ1s of Globoro-

talites umbilicatus.

2520-2580 ~-- Sample~ not' described.



.. of' '2580-2595 ~...A S~ndsione, graY, eX:treriieiY fine grairied, glauconitic; calcareous,

~

"' ' micaceous, and som~ fragments gray, flaky, marly, micaceous

,. J ,d l:l~ 1shale. The Sample containS niS:ny fr'agmeftts of Inoceramus and

of Ostr:ea sp. The microfauna' is largely; a' mixture of specimens \'~. that caved from higher l~vels, ' but contains some specimens of

species that are characteristic of the beds of Austin age:

2595-2610 ' Like. sample at 2580-2595 ft.

;: -

' 2610-2685 No change.
2685-2700 -- Shale, brownish-gray, marly, a few fragments of ~ay, fi~e-g~airied

sandstone, and many .fragments of lnocera'Tiius. The foraminifer~} fauna is chiefly a n'lixture of specimens that caved from

' ' higher levels, but contains a f ew .specimens 'of species "tliat are char~cteristic of ,the beds of ~Austin' age. ; ~

2700:-2730 ~., , No'.change.' ' r

. ' .

. ' .,

2730-2745
:2745~2~6o" .s

' ''

' ' , _ .. .-: ., l ,

.

Like sample at 2685-2700 ft., with the addition 9f fragme:nts of

light-crea~, har d, dense, sandy (fitie~grain~d . ~~nd) liniesu;ne.~

L~ke sa~ple at 273o-274ti ft., bu~ ~bowing an i~crease in the amount

. :i

. of fragments of sandy. limestone. The fauna is a mixture of speci~ens of . foraminif~r~ f~~m higher lev~l~; including species

characteristic of the beds o{ Austin age. ' '.' .

.

of 2760-2785

The sample is composed; in~i~iy, of gray ~~rl/shale and a small

lr amount sandy limestone. rr'h.~ filuna 'is similar to that in the

. ' t ... :"Sampie~ at 2745~2760 ft.

.



~. ~ '



2785-2790

f. '

1

N0 sample.

'o

'

-

i ). ~ . : ': ' '('~ r'

' ' .,..

I' ' '

2790-2805

. 1 . .

Shale, gray, flaky, , marly shale. The

m~rly, 'ari.d. a few fragments of greenish-gray
fora~iniferal fauna is ~ mixture of ~pecimens

') . ' from various hi.gher le~eis,' but~ Austin 'forms, esp e ci~iiy' ' Cit/~

. r ina texana are very abundant~

are 2805-2830 '~ ' N? change, eicept that specimens of citharina t exana

nitich

..,

less abundant. r

' ' "

'

190

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
2830-2850
.2850-2865 2865-2880 ' 2880-2895 . .. ~ . 2895-2900
. . .~
~ fl.
2900-2910 2910-2925 2925-2940
c~
2924-2933
'2933-2943 . .. .
' 2940~2955 ,,_ 2955-29702970-2985

Description

Atkinson Formation. - Upper Member.

Shale, dominantly greenish-gray,- and some gray shale. The shale contains small, brown, granular, inegular-shaped nodules of -"siderite. Spedmens of Pleurostomella watersi and Valvulineria injrequens (Eagle Ford variety) are present. The samples from 2830 to 2895 ft. are characteristic of the deep-water_ marine facies of the upper member of the Atkinson Formation.

Sample not described.

Like sample at 2830-2850 ft.; contains specimens of Gaudryina cf. G. bosquensis.

Like sample at 2830-2860 ft.; contains in addition, specimens. of Ammobaculites sp., charac;teristic of the Eagle Ford Shale in

Texas.

Sandf;!tone, quartz, light-gray to white, fine-grained, containing

many fragments of Ostrea. sp., and some fish bones, glauconite,

and mica. _The samples from 2895 to about 3360 ft. are char-

acteristic of the shallow-water marine facies of the upper mem-

ber of the Atkinson Formation. The depth of 2895 ft. is prob-

ably

the .

top

of

t

h'

e

,

T

u.s

c

al

o

os '

a

Formation

of

-some

geologists.

No sample.

:.

Like sample at 2895-2900 ft., with the addition of fragments of

flaky, smooth, green shale.

Shale, gray, flaky, fragments of green ~hale, fragments of Ostrea

c sp., and fragments of light-gray, micaceous, glauconitic sand-

-.

stone which

also .

contain. s

pho. sp. hatic' m' ateri.al' and

fish

bones.

Core. Recovery?_

Sand, clear.quartz, fine-grained, well-sorted, containing a little inica ~nd some tan-gray flaky clay. The clay contains small

fragments of carbonaceous material.

'C;re. Recovery?

-

Top. Shale, bluish-green, thinly flaky, containing a few sandy and pyritic flakes, smail fragments of brown and black carbonaceous material, a little mica, and a trace o-f blue-green glauconite. No specimens of Foraminifera were observed.

Mid~le. Like top part of core.

-Bottom. . s'andstone, light"greenish-gray, fine-grained, -highly

micaceous, containing inclusions of flaky green shale and small

fragments of carbonaceous material that is highly pyritic in

small scattered areas.



'

Shale, gree~, flaky and- many cavirigs from higher levels.

-'

-

---

'

'

'

-

:--1

V Like sample at 2940-2955 ft., and many fragments of Ostrea sp.

that are probably faVings.



Shale, flaky, ., many fragments '> of -Ostrea sp., and fragments of white, fine~grained, well--sorfed sandstone that contains a little
light-green ghl:uconite, mica, and a few fragments of Ost;:ea sp.

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

191.

Depth (feet)

Description

. . t.'.
'-

2985-3060

No change.

3060-3075

Like sample at 2970-2985 ft. and m addition, inany moderately large fragments of brown, fibrous, carbonaceous material.

3075-3120

No change.

3120-3135

Shale, flaky; arid sandstone as described in the immediately preceding sample. The sample also contains fragments of oyster shells and large grains of quartz.

3135-3150

No sample.

3150-3160

Like sample at 3120-3135 ft., and also very coarse grains of quartz and some grains 0~ pink feldspar.

3160-3210' No change.

..

3210-3225

Like sample at 3150-3160 ft., about 50 'percent, and about 50 percent fragments of dark-brown carbonaceous material.

3225-3255 3255-3270

No change.
Shale, greenish-gray, and some bluish-green shale;"' a little coars~
. grained sand and carbonaceous material like the sample at
3210-3225 ft.

3270-3315

Samples not described.

3315-3330

Like immediately preceding samples, but the shale is more micaceous and irregularly sandy (very fine grained sand). The only fossils seemed to be caving from beds of Austi~ age. ;

3330-3345

Like sample at 3315-3330 ft., and in addition, specimens of Gum:~e-:

lina sp. that are characteristic of the upper member of the At-

kinson Formation (Eagle Ford age).



.

3345-3375

Like sample at 3330-3345 ft.; also fragments of Ostrea sp. and .of

cabonaceous material, all of which. may be c"aving.
, .,. '

- :.-

Atkinson Formation. Lower Member.

3375-3420 3420-3435
3435-3465 3465-3480 .t
3480-3495 3495-3510

The top of the lower member of the 'Atkinson Formation is placed

at 3360 ft. on the basis of electric log correlation.

-' '-"

Samples not described.

'<

The sample is composed of material similar to the immediately pre. ceding samples, and, in addition, fragm ents of darker gray;flaky,

,. unctuous shale that resembles the characteristic "marine shale" of the 'Tuscaloosa Formation.

.1 Samples not described.

. " ~: .

Shale, da1k-gray, flaky, somewhat carbonaceous, is strongly domi-

nant in the sample. Specimens of Foraminifera in the sample

seem to be caving_from much higher levels.

f:u

No sample.

.

.

'.

Shale, grayish-green, flaky, slightly micaceous. The sample con-

tains one specimen of Trochammina rainwateri which is char-

acteristic of the lower member-of the Atkinson Formation (Wood-

bine age). The base of the "marine shale" of the Tuscaloosa is

;:

192

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

De8cripti01i

placed at 3500 ft. on the basis of.electric log correlation. :

3p10~3525 ' I' Like, saniple at 3495-3510 ft., -and, in addition "the sample contains '. . , .>!1 . specimens of -species of A mm.obaculites agrestis that are char-

acteristic of the lower member of the Atkinson Formation; ..

35- 25. -3540. I
. '; . .,
3540-3570

Sa~ple is : mainly .shale, hut contains,_also, fragments of white, . fine-grain~d, . somewhat glauconitic sandstone.

No change.

,

3570-3585

Sample contains much gray flaky shale,. and .some coarse-grained.

. = ~ .-, :: 1. . : . sand. Many,..worn fragments of Ostrea sp. and other bivalves,. with attached sand grains are also present. The shell fragments

seem to be indigenous 'in beds near this depth; they are chalky,

anq grains of gla~co~ite a~d phospha~ic grain~ are at~ached to

" :; them.



{ :... . ~

, ....

, .. ~ '"!'

3585-3615 ... ' Samples not described:

3615-3640

Shale, flaky, is the .dominant material;, siderite p~nets, some glau-

<' . 'r. -::-' :<,._ . conitic sandstone; and some shell fragmen.ts are also present'.

.. \ . Comanche Series undifferentiated

3640"3660 11 . Shale fragments, :like sample at 3615-3640 ft., .some coarse-grained

::., = .{ i sand, and a few fraginents of red, highly ferruginous clay.

3660-3675 s No ~sample.

of :n;75!.3'690 'J! Like l sample' 'at 3640-3660 ft., and many small' . ~~agments ':red

..

:,

0

i ,

j '(;

and mi.Jstard-colo~ed clay.

r a690-3705

Clay, gray, that m~y b~ caving, and:small fragme~ts brick-red clay.

sind, S70S~372'iF .

coarse, subanglilat, contai~in1t a 'few pi~k grain.ii, a fe'Ji

greenish-yellow grains;; and~a few grains of feldspar.

3720-3810 3810-3825

No change. .

,

.

..... ~

l :.

~ .6

.

.. . . '

.Sand, coarse, like sample at 3705-3720 ft.; pink and yellow grains

;: -.. .,'t: ;- ; .~.: ..: are more abundant, . .

.. .' -' ' - -.

3825-3870

No' ch'ange.

3870-3885

Sand, coarse, like sample at 3810-3825 ft.; greenish-yellow grains

-,, . ; - . -. . 1 .:. " very abundant. ,,: 3885.:'3960 . ~- . No' change. - ; .' 1

...._,

:. .

"

;- '

""

S960~3975i 'salid, like sa~ple . at 3870~3885 ft.; 'and 'a'fragment of mulberry-

colored, somewhat micaceous clay~shale.' - :'



3975-4200

Samples are, mainly, sand like't_he preceding samples, and a few

- i.t: / ,;Iwr.:.>,.':.. :scatte.red fragments .of gray, ' hard, den'se, very fine,. grained

d : : ' .:! cri . ' sandstone.

.:

.:< ..1 ~.. ,()

4200-4210

Sand, like thesample~ at 3975-4200 'ft., arid the highest occurrence
of multicolored (gray, purplish-red, and mustard-colored) ;~ ~ery

. H,-, '-v~ ..-- 1 ;finely ,and .highly micaceou~ s~ale,- . The Il)ulticolored shale'~ccurs

,.,l. " .1 JL . I - in the upper part ~f. the .Comanche Series;in ~any wells in the

- \. ,. , , .: llti .... southeas~rn Gulf region. ,

--.

:. .

.

4210-4250 . , .Samples .not described.

. .~

Lomi OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

193

Depth (feet)
4250-4251 " '"-'

Description

Core. Recovery?

-~ '

:. ~ -::.

Sand, quartz', very fine to moderately coarse,"a'ngular, and about
of . 50 percent fragments brown and green streaked ferruginous

clay shale.

. .

:: ;J;)..:. ;.~. .

4251-4270 . Samples not described.'

4270-4285
., \

Sand, fine to coarse-grained, and many fragments of gray and of brick-red streaked, finely micaceous, highly sandy (very fh1e grained sand) clay; also some fragments of"raspberry-colored clay shale:

4278-4288
.

Core. Recovery?

:.'

Top. Sand, pink-stained, fine-grained, moderately well sorted, and many flakes of colorless and colored mica.

Middle. Sand, etched, fine-grained, moaeratelywell sorted, about 10 percent pink grains, and a few grains of feld~par; gray mic'a flakes are abundant; brown,. gray an'd .green mica. flakes are

common.

B.ottom. Sand, fine-grained, and small fragments of dark brown-

" ish-red and yellowish7green,. sandy, micaceous clay.

4288-4298 ~ .o~x Core. Recovery?

... ' ~ , .:- ~

Top. Clay, highly sandy (very finecgrained sand), highly mica-

ceous, highly ferruginous.

. '>Jt " ,;:

} J .

., ,, 4298-4308
.~ ,.i. ...

Bottom. Washed sample. Sand, pink-stained, fine-grained, ' angli-

lar, well-sorted, and mica (mostly colorless).

Core. Recovery? ,J~ .:. ~

Top. Sand, quartz,. fine to coarse-grained; . roughly '.' an:gular';

some greenish-yellow and some p~nk grains of feldspar; a little

mica.

.:.. ;

4308:-4318.

Another part of core. Clay, red-brown, streak'ed with bluish-

gray

and

yellowish-green

areas,

m- ....

i
'

c

a

c.

e.

o
~

u

s

;

'

h

i
-

gh-

l

y

sa:rtdY ' -

(very

,~ fine-grained, sand) ... .,

..1: . , , )J <

. Core. Recovery?'r~

. ,m:ctv:; '! ' ;,.. ,,

Top. Sand, poorly .sorted, very fine' to very .coarse grained; many

greenish-yellow grains; so~e ~.e~4!':!Pflr~ ..,_ ..

:!_. '.,!-. ,~

,L. ,. Bottom:., Sand, like .top part of core but contains some mica.

4318-4328

Core. Recovery?

.!=

.

Top. Sand, fine. to, very coarse grained; many greenish-yellow

grains and some pink grains; feldspar common.

Bottom. Clay,: greel'l-ish~gray, highly sandy (:very fine grained

sand), highly _micaceous. Much of the , mica is dark (brown,

gray and green)' but some is colorle,ss.

..

....,: ' '

4328-4338

:.Core. Recovery?

_,-,, ,

. Top. Sand, fine to coarse-grained.

Bottom. Clay, red, sandy (fine to moderately coarse grained).

4338-4348

Core. Recovery?

,, .;

. Clay, 'tan, sandy. (fine .to coars~ grained sand); many sand

,. _grains are etched.

"'.

~~;

194

GEORGIA GEOLOGICAL SURVEY BULLETIN. 74

Depth (feet)
4348-4358 4358-4368
:~
4368-4378 4378-4388
I
4388~4398
4398-4405
4405-44~Qj
.4405-4420 ' 4420-4440 . . 4440-4460
4450-4460
) .
4465-4480
4460-4470

Descriptipn

Core. Recovery?

.-

Clay, bluish-gray and yellowish-brown streaked, hard, sandy

(very fine grained sand), highly micaceous.

Core. Recovery? Sand, fine to coarse-grained, roughly angular, somewhat mica, ceous.

Core. Recovery?. Sand, fine to moderately coarse grained; many greenish-yellow grains and some feldspar; a little mica.

Core. Recovery? Top. $a~d, mainly fine-grained and a few coarse grains; a little mica.

Middle. Clay, brick-red, streaked with bluish-green areas; highly micaceous.

Bottom. Clay, red, sandy, very highly micaceous. The flakes of mica are coarse, and green and brown flakes are cpmmon.

Core. Recovery? Bottom. Sand, mainly moderately fine grained, poorly sorted. Many sand grains are greenish-yellow and a few are pink. Both colorless and colored flakes of mica are present.

Sample not described.

Core. Recovery? Sand,. coarse-grained; many greenish-yellow grains; a few grains of tourmaline (?); a little mica.

Sand, coarse-grained; many grains are greenish-yellow. The sample contains cavings of gray clay and varicolored micaceous clay.

No change.

Cot:e. Recovery? Sand, fine to coarse-grained, green, brown, and gray flakes of mica are common, some of which .seem to show transition .to glauconite.

Core 23. Recovery 3% ft.

Top 1% ft. Sand, quartz, fine to medium-grained, in a matrix

of gray clay.

r

Middle 1 ft. Like top part of core, But fine grains are strongly

dominant.





Bottom 1 ft. Sand, quartz, fine to coarse-grained, roughly angu-

lar, in a matrix of gray .clay; medium grains are dominant.

Sand, quartz, fine to coarse-grained, roughly ~ngular; coa:r;se

grains are dominant; a few grains are pink,oa few are yellow.

The sample contains a few fragments of dark-red and grayish-

green mottled, micaceous shale.

".

Core 24. Recovery 7 ft.

\/

Sand, quartz, fine to coarse-grained (medium grains dominant) '1

in a matrix of gray clay. The sample contains a few tinted

-

.2- --

. I

:i;...QGS OF SELECTED WELLS .IN THE COASTAL PLAlN OF GEORGIA

195

Dept h (feet)
4470-4480
4480-4490
4490-4500
4495-4510 4510-4525
4525-4555 4555-4570 45.70-4585 4580-4590
4585.-4600
4600-4615. 4615-4630 4630-4645 4645-4660
4660-4690 4690-4705 4705-4735 4735-4750
.4750-4765

Description

grains, and a few grains of feldspar.

Core 25. Recovery 3 ft. 2 in. Clay, red and greenish-gray, micaceous; highly silty, and gTay, highly sandy (vel'y fin.e-grained sand) , micaceous clay.

Core 26. Recovery 4 ft:

,., .

Top 2 ft. Shale, r ed and grayish-green, mottled.

Bottom 2 ft. shale, red and grayish-green, mottled, unctuous.

Core 27. Recovery 1 a ft. Sand, quartz, light-gray; soft, fine to medium-grained, argillaceous; mica common.

Sand, quartz, coarse-grained; some feldspar. About 25 percent of the sample is red and green mottled shale.

Washed sample composed of coarse~grained sand,, like sample at 4495-4510 ft., and a few fragments of red and grayish-green mottled shale.

No change.

Sand, like sample at 4510-4525 ft., and about 25 percent red and gray mottled, finely micaceous shale.

Sand . and about 10 , percent shale,! like sample at 4555-4570 ft., some cavings.

Core 28. Recovery? Sand, quartz, fine to coarse-grained, in a matrix of soft white clay; niedi urn grain's are dominant; a few tinted grains, and ' a few grains of feldspar are present.

Washed sample; composed of fine to coarse-grained quartz sand and some feldspar; coarse gTains are' common. The sample con~
tains many cavings of material from the Gulf Series.

Like sample at 4585-4600 ft., and in addition, a few fragments of r ed and gray mottled shale.

No change.

Like sample at 4600-4615 ft., and in addition, a f ew nodules of

red-stained limestone.

'

Sand, quartz, fine to coarse-gTained (coarse grains common); some sand grains are tinted yellow ~nd some pink. The sample contains a f ew grains of f eldspar and a few fragments of red
and gray mottled shale.

No change.

Mainly sand, like sample at 4645-4660 ft., and a few fragments of red chert.

No change.

Sand, mainly coarse grains; a few tinted grains; a little feldspar. The sample contains a few fragments of gray, moderately hard, highly micaceous, silty clay.

Sand, like sample at 4735-4750 ft., an_d a f e.w fragments of red shale.

196

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description .

4765-4774 ' No change.

i

4774-4780 . Core 29. Recovery 5% ft.

i"

Top 6 ft. 3 in. Sand, quartz, fine to coarse-grained (fine to

medium grains doniinantr, argillaceous, and some feldspar, in a

matrix of white, bentonitic clay.

.

.

Bottom 3 iii.. Clay, mottled red, 'iray, and mustard-colored, mi-
caceous, somewhat~ sandy.

4780-4790

Core 30. Recovery 8 ft. Sand, light-gray, micaceoue, fine to coarse-grained (medium grains dominant)

Sand, -fine to coarse-grained (coarse grains dominant), mainly

_qual'tz and some feldspar. Some sarid grains are tinted pink

and some _yellow,

, ,

4810-4890 No: change.

-'

4890-4900

Core 31. Recovery 3 ft. Sand, gray and red, soft, fine-grained,. argillaceous.

4900-4915 .
.4915-4930

Sample riot described.
Sand, fine to coarse-grained, and about 10 percent fragments of dark purplish-red, gray-mottled, very finely micaceous shale."

4930-4987 4987-4989 -"".
4990-5005

No change.

Core 32. Recovery?

... _. .,j,.

Sand, clear quartz, etched, coarse-gr8.i~ed, in a matrix of soft

'white ashy clay.

Sand, fine to coarse~gr'ained and about 25 percent fragments of

red shale~-

: - ., ~ :

5005-5020 .. Sand, fine', to coarse-grained. About 10 percent of the sample is

composed of red shale. The sample contains many cavings.

.I

~ --

-.



.

.

.

'



I ,.

'

.

l :~, "

5020-5035

Sand, about 50 percent. of the sa~ple; cavings about 50 percent;

I

a little red shale.

' '

6035-5050 6.035-505d' 6050-5065
6065-5080

No change.

No change.

.,

Small washed sample c_omposed of about 50 percent sand,_ and

50 percent red shale.



No change~

,..

5080-6095

Mainly sand, about 50 percent coarse grains, and 50 percent fine grains.

5095-5110 Shale, red, about 75 percent; sand about 25 .percent.

5110-5125

Sand, coarse and fine-grained in roughly equal amounts constitutes about 75. percent of the sample; about 25 percent of the sample is composed of red shale and a few nodules of limestone.

6125-5155 5155-5170

Sand, like the Samples at 5110:5125 ft., and about 10 percent red

shale.

'"' .:l

',f Sand, like sample af 6110-5125 ft., . a few nodules of limestone, ; and 50 to 75 percent dark-red, very finely micaceous shale.

,

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

197

Depth . (feet)

Description

5170-5185 No change.

5185-5200

Sand, many nodules of limestone, some of which are red-stained, and about .10 percent red shale.

5200-5230

No change.

5230-5245

Sand, nodules of limestone, and about 25 p'ercent dark-red shale,

like the sample at 5185-5200 ft.

,. :

5245-5260 .,, Sand; nodules of limestone, and about 5 percent red shale._

5260-5290

No change.

5290-5305
. ' .

No change in materials, but red shale composes "about 25 percent

of the sample;

,, ,

t,:

5305-5320.' . , . No change;

j '

5320-5335

Sand, fine to coarsecgrained, rriany nodules of limestone, some of

which are red-stained; a little red shale.

1

5335-5350 ;.- ..

,:.- Sample contains red shale, soine nodules of limestone, and a little

sand, like the immediately preceding samples; 50 to 75 percent

of the sample is composed of cavings of materials from various

, . . levels in the Gulf Series.

, .. . '

5350-5625

No change.

5625-5650

Sand, fine to coarse-grained; nodules of limestone, and about 25 percent dark-red, finely micaceous shale, and some grayish-green, slightly red-mottled, illicaceous shale.

5650-5665

Mainly ._cavings. ~ ,

5665-5680 Sand, nodules of limestone, a little red shale, and.abundant cavings.

5680-5695

Sand, many nodules of limestone, a little red ;shale, abundant
. , cavings. ;

No change;''

Shale;' dark-red; finely micaceous; is about 50 percent of the sam-

ple; 50 percent is composed of' a little sand, many nodules of

limestone, and abundant cavings.



.~

5725-5740 . hrcLike sample at 5710"5725 ft:, but the red shale is about 25 percent

' - of the sample..: :

-r'

5740-5830

No change.

5830-5845

Shale, dark-red, micaceous, is about 50 percent of the sample; 50 percent is composed of. a little sand, many nodules of limestone, and.abundant c.avings.- Many of the limestone nodules are sandy.

5845-58~0 ,. No change.

5890-5905

The indigenous material seems to be a conglomerate composed

of pebbles of varicolored quar~zite, but amber is the most com-

. mon color. The individual grain-size varies in different frag-

ments of the quartzite. Other materials in the sample are sand,

nodules of limestone, fragments of red- shale, and cavings, all of

which,occur in the immediately preceding samples.



5905-5920 5920-5935

No change: Mainly cavi~gs and a little .red shale. ,

198

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
5935-5950
5950-5965
5965-6025 6025-6040
6040-6130 6130-6145
6145-6190 6190-6205 6205-6220

Description
Like the sample at 5920-5935, with the addition of a few nodules of limestone.
Like the sample at 5935-5950, but with the addition of fragments of green shale, and an increase in tlie amount of limestone nodules; Some of the nodules are sandy.
No change.
Like the sample at 5950-5965 ft., with the addition of a few fragments of chert and a few fragments of quartzite.
No change. Shale, red and green mottled; many nodules of limestone; a little
sand (including a few fragments of green pebbles), a few coarse grains of chert, and a few of quartzite. No change. S,hale, red and grayish-green mottled; some cavings.
Shale, red (in part bright-red), and some mottled red and grayishgreen; many nodules of limestone; fraginents of chert; fragments of quartzite; fragments of green slate ( ?) , and other materials_

Triassic ( ? )

Upper Triassic (?) Newark (?) Group

6220-6250

Like sample at 6205-6220 ft., but bright-red shale is much more common.

6250-6295

No change.

6295-6310

Shale, bright-red, moderately hard; a little sand, nodules of limestone, and fragments of chert, like the sample at 6205-6220 ft. The red shale shows a little mottling of light grayish-green, and contains a few pebbles.

6310-6385

No change.

6385-6400

Shale, bright-red; slightly grayish-green mottled, and many fragments of light-pink to gteenish-gray, fine-grained micaceous sandstone.

6400-6410

No sample.

6410-6415

Like sample at 6385-6400 ft.

6415-6430

Shale, like sample at 6385-6400 ft., a few nodules of limestone, and a few fragments of pebbles of various kinds of material.

6430-6510

No change.

6510-6~25

J Shale, bright-red with light-g1een mottling, like samples beginning about 6205"6220 ft. The shale contains irregular-shaped nodules of siderite ( ?) and a /ew fragments of chert.

6525-6540 6540-6550 I 6550-6560

Like sample at 6510-6525 ft., but siderite seems to be absent.

No change.

'>

,

Shale, like sample at 6510-6525 ft., and m'any fragments of diabasef /

some of which is possibly weathered. _

'~

r

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

199

Depth . (feet)

Description

6560-657P, .Like . sample at 6550-6560 ft. hut contains less diabase.

6580-6640

No change.

6640-6650

Shale, red; much less diabase than in tli.e samples beginning at 6550 ft.; many fragments of light-red, fine-grained, argillaceous sandstone.

6650-6660

Like sample at 6640-6650 ft., but contains less sandstone.

6660-6670

Shale, red, mottled with green areas; some diabase that is prob-

ably caving; very little . sandstone; a few fragments of red

~~

'

6670-6680

No change.

6680-6690

Shale, red, mottled with light-green areas; a few fragments of chert pebbles; a few cavings of diabase. The shale is a somewhat duller shade of red than in the prect;d\ng samples.

6690-6780

No change.

6780-6790

Shale, and a few eavings of diabase; a few fragments of pink, moderately hard, fine-grained, argillaceous, micaceous sandstone.

6790-6800

No change.

6800-6810

.Shale, like sample at 6780-6790 ft., and in addition, a few fragments of light pinkish-tan, fine to medium-grained sandstone containing colored grains of different kinds of material!' that give the sandstone a finely speckle~ appearance.

6810-6820

No change.

6820-6830

Mainly shale; a few fragments of sandstone, like sample at 6800-

6819 ft.; a few cavings of d~abase.

'

6830-7030

No change.

7030-7040 7040-7059

Shale, red, somewhat green-mottled.

No change.

' <j ""

'7059-7065

Core 33. Recovery? Top 2 ft. Shale, red.

Middle

do

Bottom

do

7065-7070

No sample.

7070-7080

Shale, red, somewhat green-mottled, and a few fragments of diabase. .

. 7080-7100

Shil:le, red, and a few fragni.ents of diabase.

71oo~nto '

. ..

.

. .. .

Shale and about 25 percent..diabase.

7110-7120. Shale and a little diabase.

7120-7130

Shale, and about 10 pei:cent diabase.

7130-7140

Mainly red shale, and a little diabase.

7140-7230 7230-7240

No change. Shale and a little diabase, like sample at 7130-7140 ft., with the
addition of fragments of light-red, hard,-finecgrairied; ' micaceous sandstone.

2oo

GEORGIA GEOLOGICAL SURVEY BULLETIN' 74

/

Depth (feet)
7240-7250
7250-7260 7260-7310 7310-7320
7320-7330 7330-7340 7340-7350 7350-7360
7360-7370
7370-7380 7375-73771h

D'escription

Like s~ii'nple at7230L7240 ft., but showing an 'increii.se in fr~agments of sandstone.

Shale, red; a little diabase; a few fragments of sandstone.

No change;

Shale, and some fragments of diabase like sample at 7250-72.60 ft. ;. A few fragments of shale contain small inclusions of limestone.

No sample.

!l .;

Like sample at 7310-7320 ft.

Like sample at 7330-7340 ft., and many cavings.
fn Shale, red, and many fragments of black shale si.milar texture

to the red shale. The black coloring is due, possibly, to alteration

., by intrusions of diabase. .



, ,

- .

1

I

.

'

Similar to sam.pies at 7350-7360 ft.; but this sample- contains less

black shale and more diabase.



Shale, red, and 50 percent diabase.

Core 34. Recovery '14 in. ,J

7380-7'390 ' 7390-7400

;' Diabase. ;
J.
"'Shale; red; an~ about 25 percent diabase: '
Shale, red, and from 50 to 75 percent diabase.

7400-7410

No change,

.

. .

7410-7420

Like sample at' 7390-7400 ft., and in addition, a few fragroents of

splintery gray shale 'which may be indig~m'ous in beds near this

depth.

u

74~0~7430

Shale, red, about 20 percent .diabase, and ..a few fragments of gray

to greenish-gray shale.

. .,,.

ti

li

7423 7430-7440

Bit sample.

,..,

Shale, red, and cavings.

:.; It

Shale; red; about 50 percent diabase, and ,a few fragments of

quartzite pebbles.

7440-7450

Shale, red, and about 75 .percent diabase..

'

745_0,7480 ; 7483
(
7480-7487

. No change.

~: .' ... :

Bit sample?

Like the immediately preceding samples, with the addition. of many fragments of pink, ~ard, dense, fine.-graizi_ed, arkosic !land-

stone.
Like sample at 7483 ~t., but this s~mpte contains''iess sta~dston~.-

7486-7489

Core 39. Recovery?

Top 14 in. Unidentified black m~teriaL-

. -~

, '''.

Bottom 5 in. Sandstone, pinkish-gray, dense; somewhat arko-sic,

. -~

very fi,ne grained.

7489 7490!T.D. No sample.

'

LOGS OF SELEcTED WELLS IN THE COASTAL PLAIN OF GEORGIA

201

SEMINOLE COUNTY



.-:

Operator: Mont Warren

GGS. No. 187

'

Landowner: W. E. Harlow Est. Well 1 Elevation: 145 ft. (derrick

Location: Land District 27, Land Lot floor) .

82; 660 ft. from south line; 660 ft. Total depth: 3572 ft.

from east line of Land Lot 82.

Completed: Feb. 27, 1949.

Srimma,cy. of Stratigraphy

Depth

r.

(feet)

Tertiary

Paleocene

r:ri l?eds of Midway age; 1st sample

.:_\

'at 1420 ft. _ ____.____~_________;___ __ ~_, ?

'l'hiekness (feet)
?.

..

Cretaceous

Gulf

' ;:

Beds o(Navarro age ------------~--.-----------_:_____7 _ _____ _______ 1430

80

Beds of Taylor age_________=-----------------~~-------:_--~-------:~-- 1510

640

Beds of Austin age___~:------------------~---------------------~~-------- 2150

390

Atkinson Formation, upper member________________________ 2540

510

~..: .
..

lower member_____-----'---- 3050

229

to ..

Comanche undifferentiated _:__ ._. ________________:.__~- 3279 total 293

depth

A

.

. .

..

'

.

Lithologic and paleontologic description of cores

and cuttings. Samples are cuttings unless other-.

wise stated:
#




. :
1,:.._.

D epth (fe et)

. . ~

~t

Description

' '.

" 0-1420 ,. ' Samples riot studied.

., . . . ~ 1420-1430

Tertiary
In Paleocene Series
Chalk, light-gray, highly sandy (very fine-grained sand), glauconitic, and a little inedium-grairied sand. Sample contains many
.. specimens of Midway species of Foraminifera.

1430-1440

Cretaceous
Gulf Series

Beds of Navarro age

Like. sample at 1420-1430 ft., butless chalk and more sand. Many

specimens of Globotruncana sp., Giimbelina sp., and other Cre-

taceous species of Foraminifera..

1





..

202
Depth (feet)
1440-1450 1460-1470
1470-1510

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Sample not studied. Washed sample. Sand, fine to medium-grained; fragments of hard,
silty to sandy chalk (Paleocene); and fragments of white, glauconitic, slightly sandy chalk. Samples not studied in detail.

1510-1520 1520-2150

Beds of Taylor age
Washed sample; large residue. Sand, medium to coarse-grained; fragments of chalky, glauconitic siltstone; and somewhat silty, glauconitic hard chalk. Sample contains many specimens of Lituola taylorensis; a few specimens of Stensiaina americana, G.lobmotalites conicus, and many other species of Foraminifera.
Samples not described in detail. Samples from 1520 to 1550 ft. like sample at 1510-1520 ft. with the addition of Inoceramus fragments at 1550 ft. Below 1700 ft., the samples are smaller, and contain fin~ to coarse-grained sand; glauconite and Inoceramus fragments; fragments of gray, somewhat silty clay shale; and many specimens of Foraminifera.

2160-2160 2160-2420 2420-2540

Beds of Austin age
Shale, gray, marly; a little sand; nodules of pyrite; many fragments of Inoceramus. Abundant specimens of Foraminifera: Pseudogaudryinella capitosa var. (Austin variety); a few specimens of Kyphopyxa christneri (upper part of beds of Austin age or lower part of beds of Taylor age); a few specimens of species of ostracodes that, usually, are indicative of the beds of Austin age.
Shale, gray. The samples usually contain fragments of Inoceramus in varying amounts, some nodules of pyrite, and many specimens of Foraminifera and Ostracoda. Herrick1 (1961, p. 355) reported the occurrence of specimens of Citharina texana in a sample at 2310-2320 f~~
Highest occurrence (2420 ft.) of fragments of speckled shale, which are progessively more abundant -in deeper samples.

I
2540-2550

Atkinson Formation. Upper Member.
Like samples from 2160 to 2540 ft., with the addition of many fragments of Ostrea sp., also a few fragments of very fine grained, somewhat micaceous, argillaceous sand'stone containing a little carbonaceous material and a trace of glauconite.

2550-2560

No change.

2560-2570

Highest occurrence of grayish-green, micaceous, somewhat sa'ndy (fine-grained sand) shale.

: J' )

'Herrick, s. M., 1961, Georgia Geological Survey Bull. 70 ..

: (.
I.
!
. (

LU).k
(

. kl$.)} I.

...!!!iij

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

203

..: : ~~~~-

Depth (feet)

Description

2570-2600 ' Shale, grayish-green; many fragments of Ostrea sp.; a few frag-

ments o-f fine-grained sandstone like se,mple at 2540-2550 ft.

The sample also contains loose sand, shale, and specimens of

Foraminifera caving from different higher levels.

2600-2616

Core 1. Recovery 6 ft. Top. Sandstone, light-gray, fine to medium-grained, glauconitic, .somewhat phosphatic, slightly micaceous.

Middle. Sandstone, like top part of core, but more glauconitic, and containing fragments of Ostrea sp .

Bottom. Sandstone, light-gray, hard, fine to medium-grained, glauconitic, somewhat phosphatic, calcareo~s.

2616-2770

Samples are a mixture of cavings from higher levels, composed of fragments of grayish-green shale; several types of fine-grained, micaceous sandstone; and fragments of Ostrea .sp. in .varying amounts. The material drilled is interpreted as, mainly, fine to medium-grained sandstone and some coarse-grained sand, containing fragm ents of Ostrea sp.; phosphatic nodules, and glauconite.

2770-2780

Sand, coarse-grained, containing phosphatic nodules, and glauconite; also a f ew fragments of hard, calcareous, fine to mediumgrained sandstone. The sample contains fragments of Ostrea sp. and a little lignite.

2780-2940

Samples are similar to sample at 2770-2780 ft. The lignite is pro-

gressively more abundant in the samples to 2830 ft., and al-

though present in the samples from 2830 to 2940 ft., it may be

caving, in part.

t

;.

2940-2950

Mainly sand and shell fragments ; also fragments of sandstone and lignite (as in the samples from 2770 to 2940 ft.), and a little grayish-green, splintery shale. This sample contains a few specimens of Planulina eaglefordens-is.

3030-3040

Mainly cavings of gray clay shale. Also in the sample are fragments of grayish-green, irregularly micaceous shale, in which crushed fossil deb~is is fairly common.

3040-3050 .. Like sample at 3030-3040 ft.,. but fossil debris is more abundant.

3050-3060 3060-3100 3100-3110
3110-3197 3197-3216

Atkinson Formation. , Lower Member.
Shale, gray, flaky, micaceous, slightly carbonaceous is fairly common in the sample.
Samples not described. Gray, irregularly micaceous shale, and fragments of h ard, fine.:
grained, glauconitic sandstone compose most of the saniple; specim~ns of Ammobaculites advenus also occur.. Samples not described.
Core 2. Recovery 7 ft.

,-;.

. .i

204

GEORGIA GEO~GICAL SURVEY BULLETIN 74

Depth (feet)

Description

(corrected depth
3210-3224)
3216-3258
3268-32.68 .(corrected
depth
?~7:2-3282)

Top 3 ft. Sandstone, gray, medium-grained, argillaceous; glauconitic, micaceous, somewhat phosphatic.

2nd 22 in. Shale; dark-gray, flaky; containing partings of lightgray, soft, medium-grained, glauconitic, micaceous sand. 3d 22 in. Sand-streaked shale like middle part of core.

Cuttings are mainly, gray shale like samples below 3050 ft., a

little-fine-grained sand and glauconite, and cavings from higher

levels.

" ,, :

Core 3. Recovery 10 ft.

Top 1.! ft. Sandstone, gr~y, fineto ve.ry coarse grained, contain-

ing pebble~ of phosphatic material, glauconite, and large frag-

ments of pyritized lignite, The sandstone is streaked with lenses

o~ gray, f~aky shale like c;?re 2 at 3197-~?16)t.



Middie 3.! ft. Shale, gray, Jlaky, slightly micaceous, containing

partings of fine-grained, glauconitiC sandstone. The bottom 4

in. of this part of core..3 is gray, hard, micaceous, glauconitic,

calcareous sandstone, containing fragments of carbonaceous rna-

~~

.

.., . . , .
,.

.J3ottom 5 ft. The upper 2 ft. of this part of core 3 is fine. to .moderately coarse-grained, roughly angular sand in a tan, waxy clay . matrix, containing, al:;~o, light-brown;. irregularly-shaped nodules of siderite ( ?)
Comanche Ser,ies undiffere' ntiated

~.., The lower 3 ft. of the bottom 6 ft. of core 3is medium to coarsegrained, roughly angular sand in a white, somewhat micaceous,

"

bentonitic matrix.

3268-3290 ..
3290-3300
s3oo

Sand, mainly coarse:grained, roughly angular, quartz, and a little

white feldspar. Some sand grains are pink-tinted quartz.

No change.

J ' ~ ,.;

Like sample at 3290-3300 ft., but with 'the additio.n at this depth ~f fragments of timstard~yellow and gray mottled waxy shale.

3300-3554 T.D. Main1y coarse-grained quartz sand '<a few pink-tinted and yellow-

(corrected

tinted grains); a little white feldspar; a few fragments of mus-

tofal depth

tard-yellow shale; and a few fragments of red and gray mottled,

3572)

silty, micaceous clay shale.

SEMINOLE COUNTY

Operator: Mont Warren

GGS. No: 204

.,

Liu~downer: .Grady Bell Well 1A

,.

.,

.

.

"!

.



Elevation: 114 ft. (d~rtick floor)

Location: Land District 27, Land Lot Total depth: 3810 ft.

61; 560 ft. north of south line; 660 Comi1leted: Mar. 10; 195o_;L

ft. easj; of west line of Land Lot 61

...

1;
~

''
1
.I

I

(

' LOG~ OF SELECTED WELLS IN THE. COASTAL PLAIN OF GEORGIA

205

Summary of Sttaiigraphy

Depth Thickness

(feet)

(feet)

Tertiary

In Paleocene beds containing Tamesi fauna; ... .1. st. sa... inple. at 1860 ft. ~- ' -~

?

?

ir

f.

. I

f
~--

Gulf

' .
Cretaceou~ ..\

Beds'of Navarro age

---------- - - - - - - 1900

55

Beds of Taylor age --------------------------- -- -- 1955

445

~
.!i : .

Beds of Austin age --------"--o---------,.------..:__________________ 2400

300

Atkinson Formation, upper member_:....____________~--- 2700

410

, .':h..

:lower member ___:_-----~-'.;.:h____ 3110

310

Cornimche undifferentiated ____:______~:____c___________________~--- 3420

390

Lithologi_c_ ,and paieontol~gic gescription of c-ut-

'), tings and .cores. .Samples are cuttings~ unless

otherwise stated.

'. . . ~ . '

Depth (feet)
~-

Description

0-1860

Samples l{ot studied.

- ~

'I.
Tertiary.

In Paleocene Series

\., : .,;,,.

. I ' ,1

}_ ;

'

I

1860-1870

Clay, gray; about 25.- percent of sample is fiiie to coarse-grained,

,il . subangul~r; quartz sand, and many specim~ns of Foraminifera

~~ . that are a mixture of. Midway and Tamesi (Velasco) species.

1870-1880 Like sample at 1860-1870 ft., but sand is 50 to 75 percent of

.: : ..~ ,~ .!_, . . .;Sall1ple;

'1

r [

1880-1890 I No change..

1890-1900

~. Llke sai:nple at 18'70-1880 ' ft.,' with the addition of a little glauco- ,

nit~.

'

. . '

I '

. f

Cretaceous

Gulf Series"

v.

. . ~ - . : ~.~

.B.e.e,..f~s of Navarr.o age

.1900-1910

Like the preceding samples with the addition of a few fragment's . of cream, fossiliferous limestone and specimens ofGlobotruncana

. sp.

1910-1960

Clay frairnents decrease in abundance and specimens of Late Cretaceous species of Foraminifera show an increase.

206
Depth (feet)

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
.. Description

Beds of Taylor age

The top of the beds of Taylor age is placed at 1955 ft. on basis of electric log correlation supported by sample data.

1960-1970 Washed sample, small. Sand, fine to coarse-grained; fragments

of glauconitic clay; a little chalky marl. Sample contains speci-

mens of Globotruncana sp. Stensioina americana, Bolivina in-

\;, .

crassata.

1970-2400

Samples not studied in detail. In general, the samples consist of soft, gray, calcareous, somewhat glauconitic shale and varying amounts (usually small) offine to coarse-grained sand.

2400 2400-2700

'

Beds of Austin age

The samples do not seem to contain lithologic or paleontologic data that definitely place the top of the beds of Austin age. T~e top of the unit is provisionally placed at 2400 ft. on the basis of el~ctric log correlation. The highest occurrence of the speckled shille characteristic. of the lower part of the beds of Austin age is near 2600 ft.
Like samples at 1970-2400 ft.

.. Atkinson Formation. Upper Membel'.

2700 2710-2720
272~2730
2730-2740 2740-2750
2750-2820

.The top of the .upper member of the Atkinson Formation is placed

-, at 2700 ft. on the b~sis of electric log correlation supported by

sample data.



-

Highest occurrence of hard, very fine grained, calcareous, phos-

phatic, micaceous sandstone.

; i

Sandstone, cream, very fine grained, micaceous, slightly glauconitic, phosphatic, calcareous,that seems to contain fragments of Ostrea sp.

Sandstone, like the sample at 2720-2730 ft.; 'fragments of grayish-

gree~, slightly carbonaceous shale, containing thin partin'gs of

fine-grained, micaceous, slightly glauconitic sandstone; a ,.few

fragments of Ostrea' sp.

.

The sample is at least 50 percent cavings of shale from higher levels. The possibly indigenous part of the sample is composed of very fine-grained sand; fragments of gray, soft, fine-grained, micaceous, weakly glauconitic sandstone; a few fragments of greenish-gray flake shale; fragments of fish bones and fish scales; and specimens of Foramirufera' that are, mainly, caving.

Samples are similar, in general, to samplEil at 2740-2750 ft.; but the amount of greenish-gray shale seems to i_ncrease progressively with depth. The material drilled seems to be grayish-green, flaky, slightly carbonaceou~ -shale, containing thin beds ~f finegrained, micaceous, weakly glauconitic sandst_one.
/:,
i .
. t

,

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

207

Depth (feet)
2820-2830
2830-2856 2856-2875
2880-2890
2890-2900 2900-2910
2910-2950 2950-2960 2960-3120

Description

Shale, grayish-green, flaky, and many fragments of moderately hard, very fine grained, micaceous, slightly glauconitic sandstone containing- fragments of Ostrea sp. Sample contains a few specimens of Pl_anulina eaglefordensis.

Sand, fine-grained; fragments of sandstone; fragments of grayish' ' green, flaky shale; fragments of Ostrea sp. The samples con-
tain a few specimens of Planulina eaglefordensis.

Core 1. Recovery? Top. Shale, grayish-green, flaky; about 20 percent very fine grained sand; and traces of glauconite and carbonaceous material. Other parts of the core are, mairily, shale containing fine-grained sand, a little glauconite, . a few small specimens 9f Globig erina sp., and a few fragments of Ostrea sp.

Shale, grayish-green; a few fragments of speckl~d shale that may be caving; many fragments of Ostrca sp. and bryozoan fragments; a little glauconite and phosphatic material. The specimens of Foraminifera in the sample seems to be caving.

Sample not desc1ibed or no sample.

Sandstone, medium-grained, calcareous, somewhat glauconitic,

containing p1any fragments of Ostrea ' sp. and a few phosphatic

nodules. Tne sample contains a few fragments of grayish-green

shale, bryozoan fragments, and a few specimens of Planulina

I' eagleford ensis.





No change.

Shale, flaky, and fine-grained sand; a few fragments of Ostrea sp.

Samples not studied in detail, but the strata drilled seem to be alternating beds of grayish-green flaky shale, and light-gray, fine-grained, glauconitic, phosphatic, sandstone in which fragments o~ Ostrea sp. are common. .

3110 .
3120-3130 3130-3270
3270-3280
3280-3300 3300-3310

Atkinson Formati~n. Lower Member.

,.

The top of the lower member of the Atkinson Formation is placed

at 3110 ft. on the basis of electric log correlation supported by

sample data.



.

Like samples at 2960-3120 ft. with the addition of a few fragments of dark-gray flaky shale.

Samples are like the :samples at 3120-3130 ft., but the amount of

dark shale increases progressively with depth and the shell

fragments decrease.



Shale, dark-gray, flaky, slightly carbonaceous, containing frag-

ments of fish bones, fish scales, and white, micaceous, moderate-

ly hard silts tone.



No change.

Like sample at 3270-3280 ft., with the addition of specimens of

---

208

GEORGIA GEOLOGICAL SURVEY BULLETIN 74



Depth (feet)
3310-3400 3400-3410
-:!
3410-3420

Description

Ammobaculites agrestis, and a few other species common in the lower Atkinson.

Like sample at 3300-3310 ft. No change in fauna.

Sand, coarse-grained, quartz, about 75 percent of sample; .also a . little dark-gray shale like .the preceding samples, a few . large
phosphatic nodules, fragments of lignite, and 'Ostrea sp.

Sample alinost entirely coarse-grained quartz sand, a few shell

fragments and a few large phosphatic nodules. '

~:1'-:

Comanche Series undifferentiated

3420-3510 The top of the Comanche is provisionally placed at 3420 ft. on the

basis. of eiectric log correlation.- The samples from 3420 to 3510

ft. seem to contain much caved material and the top of the

. \ '

Comanche may be, in fact, at 35;10 ft. where the sample shows

the characteristic lithology of the Comanche.
in 3510-3520 ,; sand, coarse to very coarse, roughly angular quartz a white,
bentonitic matrix. The sand contains a few pink-tinted and a

few yellow-tinted grains, and a f ew grain s of --feldspar. .: .

3520-3550 . Like) sample at 3510~3 520 ft. ,1, .

" .

.:. .

3550 ~3560

Highest occurrence of fragments. of red and gray mottled mica-

ceous, silty shale.

35El0-38l0 T.D. Sand; coarse to very coarse, quartz,_contai.ning a few pink-tinted

and a few yellow-tinted grains, and a few grains of feldspar.

"~ .:
.J

' .i

...;

f
. THOMAS COUNTY.* ..

I ' ..~ .; .

Owner: U.S. Gove1:nment (War Dept.) Operational Training Station Well 1
Location : 8 mi. northeast of Thomasville, Ga..,..
1 ,. !1,,

GGS No. 19

. Elevation: 227 ft.

Total Depth: 295 ft.

Completed:
: .,_

.S; ept.

14,

1942

Summary Qf Stratigraphy

'. . :.~...

Depth 'i'bicknese

. ' (feet)

(feet) .

___ .. _...;) ji'l: :-,.

Tertiary

Miocene undifferentiated ------- ---- - ---~ "

:__ ~

5

(.
115

lower, Tampa Limestone_:_ -"--~----~---;___:______-~

120

'

. '

.,
.

.

.

.

15

~ ~ r

f ,-

I .

I i ~ .

,.

a Publica tion of thi s data is authorized by the Sun Oil .. Company, . to~ whom t he r eport waa

prepared"On CQMJnercial basis .

~

!<'" , .. :

'"1 I , ..

(.~~ .'

;""'. 1',;

,

LOGS OF SELECTED WELLS IN THE COASTAL PLAiN OF GEORGIA

209

Depth Thickr1ess

(feet)

(feet)

Oligocene

upper, Suwannee Limestone ___:__:_ ___________.. ____ 135

. . 90

do .

Dictyoconus zone __:___ 225

35

middle and lower, Vicksburg Group -- -~----------- 260

30

Eocene to
upper, Ocala Limestone upper member___________________ 290 total 5
depth

~ithologic , and paleo~.tologic description of cut- . tings . and cores. S.amples are cuttings unless otherwise stated,

'l

Depth (feet)

Description '; . .,.,

Tertiary '' .

:.

~

Miocene . Series undif.f~r~nt.iated

. '

'~ .

5

Sand, clear quartz, fine-grained; 'sharply angular.

10

Clay, yellow and white streaked, highly s'andy.

rf.'.

15

Sand'stone, tan, moderately fine grained, argillaceous.

~
j: ~

2o r 25

Sandstone, yellowish-b~own, white-streaked, argillaceous.

Like sample at 20 ft.; but loosely' co~solidated.

.

~~

30

Like sample at 25 ft.

35

Like sample at 25 ft.

..1

40' '

Like .sampl~ at 25 ft.

I
. -n - 45 :1n ~

Like sample at 25 ft.

"' :: so. '~ ,. .Clay, tan, .argillaceous; sandy. (fine-grained' angular sand). The

.( ' ,;

. sample con~ins a few small.nodules .of chalk

55

Like sample at 50 ft., and a: few small fragments of lignite.

60

Sand, white, argilhiceous, containing small particles of limonite.

70

. Like sampie at 60 ft.

l

75

Like sample at 60 ft. '

80

Li_ke sample at 60 ft.

85

r Like sample at .so ft.

90

Like sample at 60 ft.

95

Like sample at 60 ft.

100

Like sample at 60 ft.

~

105

. ~Clay, white, sandy, and a few large nodules of sandy clay showing

dendritic markings; a few nodules of quartz.



110
..

Sand, clear quartz, white, fine-grained, sharply 1\ngular, argilla-

ceous. .

... .

115

Like sample at 110 ft., and a few nodules of cream sandy limestone.

210
Depth (feet )
120 125 130
135
140 145 150
155 160 165 170 175 180 185
190 195
200
205 210 215 220

GEORGIA GEOLOGICAL SURVEY BULLETIN 74
Description
Lower Miocene. Tampa Limestone. Limestone, cream, hard, sandy, irregularly porous, nodular, con-
taining traces of impressions of fossils. Like .sample at 120 ft. Like sample at 120 ft.

.Oligocene Series

Upper Oligocene. Suwanee Limestone

Limestone, white, chalky, microfossiliferous. The microfauna contains specimens of Rotalia byramensis and Asterigerina iubacuta, which are characteristic of the Oligocene in this area.

Like sample at 135 ft.

Like sample at 135 ft.

Limestone, white, moderately hard. Large chips of the limestone contains molds and fragments of molds of fossil bivalves, and a f ew echinoid spines.

Like sample at 150 ft. Sections of small miliolids are common in some f r agments of the limestone.

Like~ sample at 155 ft.

Like _sall!ple at 155 ft.

Limestone, chalky, hard, nodular, like sample at 155 ft., and a few

nodules of flint.



Like sample at 170 ft.
'' Like sample at 170 ft.
Limestone, white, hard, chalky, coquinoid, composed chiefly of
chalk-cemented, worn and rounded molds of microfossils and fragments of macrofossils. The fauna contains a few specimens of Architias ( ?) sp. that is characteristic of phases of the Oligocene in Florida; specimens of Rotalia m ecatepecensis and small miliolids are common.
Like sample at 185 ft.
Like .sample at 185 ft., but the determinable fossils are Rotalia cf. R. choctawensis, echinoid spines and sections of miliolids. The sample contains a few fragments of flint.
Similar to sample at 195 ft., but softer. Specimens of several species of small Foraminifera that are common in this sample are characteristic, also, of the Oligocene in Florida.

Like sample at 200 ft.

Like sample at 200 ft.

;

Like sample at 200 ft. Fragments of .echinoids are faidy com-

mon.

Limestone, white, hard, chalky, nodular, containing fragments of

P ecten sp., and traces of mol_ds and fragments of molds of

microfossils.

;( . ' : . I
f

~-

--

~.

~
-r','

LOGS OF SELECTED WELI,S IN THE COASTAL PLAIN OF GEORGIA

211

L

i'

Depth

~ --

(feet)

Description '

~--

f.:

Upper. Oligocene. Suwaneee Limestone

I

225 . , ,..

Dietyoconus Zone.
) .
Limestone, chalky, hard,. fossiliferous. The fossils are, mainly, poorly p:ieserved molds. Among the megafossils are fragments of Pecten sp. and large echinoid spines. The microfauna contains

.r .

specimens of species characteristic of the Oligocene; Valvulammina sp., Valvulina sp., Dictyooonus sp., and Lepidooyclina sp

~:

230

" Like sample at 225 ft.

~-

235

Like sample at 225 ft.

'i!-

240

Limestone, chalky, fossiliferous, nodular, and numerous fragme:nts

of brown, dense, dolomitic ( ?) limestOne.

245

Dolomite, dark-brown, porous, granular crystalline.

250
':.
255

Dolomite, like sample at 245 ft., and moderately sdft. chalky lime-

stone.



Dolomite, brown, and a little chalky limestone that is possibly caving from higher levels.

-

, Middle and lower Oligocene. Vicksburg Group.

\ ! 260 "

Limestone, .dolomite, like sample at 255 ft., and white chalky lime., stone that contains abundant 1rregular-shaped, rounded, chalky
. algal concretions, and many specimens of L epidocyclina_ mantelli.

265

Limestone, chalky, fossiliferous, concretionary, like sample at 260

ft. Fauna like sample at 260 ft.; Lepidocycli'Tta mantelli is com-

mon, and fragments of L epidocyclina yurnagune'nsis al~O' occur.

270

Material and fauna like sample at 265 ft. Specimens of Lepido-

cyclina mantelli ~~:nd. L. yurniigunensis are very abundant.

275

Like sample at 270 ft., but the fauna is much less abundant and

.less well preserved.

280

Like sample at 275 ft.

285

Like sa;nple at 275 ft. '

Eocene Series

.Upper Eocene. Ocala Limestone. ; Upper Member .

290

Limestone, white, hard, porous, fossiliferous, that seems to be a

water-worn coquinoid limestone.

of 295 T.D. Limestone, like sample at 290 ft., and a small amount of finegrained clear quartz Sal).d. Specimens L epidocyclina like those in the samples at 260-270 ft. are probably cavings. Specimens of L'epidooyclina ocalana (two varieties) in the sample indicate

the upper Eocene age of the limestone.

212

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 .

THOMAS COUNTY

. :~

Owner: City of Thomasville, Ga.

Well 4

,.

'':
/

_ GGS. No. 56
Elevation: 263 ft. Total Depth: .305 ft. .. ,. .Completed:: Aug. 20, 1936

Summary of Stratigraphy ,_
.. ,:,Depth Depth
Tertiary and Quarternary .

Thickness (feet)

. \.

.

.

.

Pliocene (?) to Recent (?) Undifferentiated --------~ 5

30

Tertia,cy

I' .

:1

Miocene Undifferentiated --------------------------~-------'--:. 35

140

oiigoc~me !. . ;

.



.

. - .

upper, Suwannee Limestone ----~--~----~----~--~--~-~~--------~~~:- 175

53



.

..~

"' ~ ," 4 '

. to

: middle'( ?) 'or lower ( ?) t, Vicksburg ( ?) Group__~_. .. 228 total' 77

~.. :

;,.'' . '~ .



....

1 . . ,.~'<.

depth

Lithologic and paleontologic- description of cut-

. t~ngs , ; and. cores. . Samp,les are cuttings ,; unle!)s. .,;-1

. otherwis.e-stated:

,, _. 1

..p . ~

.... -~.

,. ~: .

._._

:;. , _:

Deptb' ., . 'I
... (feet)

Description"'\; '>!et

~-.

"

.I

Tertiary and Quartemar;i_' ..
, Pliocene(?) Series tO Recentq) _Series -::,.k

I Undifferentiated

-~

. -

5

Sand, deep-orange, argillaceous.

Washed residue;large. Clear, su_bangular, moderately fine, mod-

erately well sorted sand, and a few fragments of clay matrix;

no fossils.

'



15

Sand, like sample at. 5 ft.

25

Sand, lemon-yellow, argiilaceous.

Washed residue, large~ Fine-grained, angular, well sorted quartz

simd, containing a few hard, fragments ~f clay inatrix; no fossils.

>The occurrence of specimens of Lituonel/a floridana, the abundance of specimens of Dict-joconus jioridanus, and the absence .of specimens of typical Oligocene species in the samples from 286 ft. to the bottom of the hole, suggest that the rocks in this 19-foot interval may be middle Eocene (Avon Park Limestone} rather than Oligocene in age. Nothing in the samples suggests the well penetrated beds of upper Eocene age.
. .
' . c.... .' . ~~

LOGS OF SELECTED . WELLS IN THE COASTAL PLAIN OF GEORGIA

213

Depth (fee,t)

Description

Tertiary

... -.

t:":

.....

MiOcene Series undifferentiated

'

35

Clay, white, sandy.

. ,. .,~

,J

Washed residue, small. Fine-grained, angular, clear quartz sand,

and a fey; clay nodules.

45

Cl!iy, white and very light green, chalky.

Washed residue, moderately small. Fine-grained, angular, clear

quartz sand, like the sample at 35 ft., a few fragments of in-

~

durated clay, "and"about 25 percent 'sman; white, chalky nodules; no fossils.

~~
~.:.

\

:. !:, '

. - -~ .

..

55

Clay, light-green, sandy, slightly calcareous. Washed residue,

large. Clear, angular, fine-grained, quartz sand, and about 50

perce~t small nodules of clay. .

.

,

65

Like sample at 55 ft.

70

Like sample at 55 ft.

80
.... 85 ~
J, ..
((

Like sample at 55 ft.
Clay, light~greenish-gray, sandy (fine-grained sand), somewhat calcareous. Washed resid_ue, moderately large. Very finecgrainj,, ed, angula~. ci"ear quartz sand, and about 25 percent fairly large, greenish-gray nodules of limestone; no fossils."

95, '
: ;_ , I ~

Clay, greenish-cream, hard, sandy, bentonitic. Washed residue, . ..moderately large. Fragments of sandy clay, ~nd about 50 percent : fine-grained, angular, clear quartz sand; a few chara stems.

106..

' , . '

Clay, cream, hard, sandy (fine-grained sand) calcareous. Washed 'r.esidue, large. Fragnients of clay, and about-:50 percent mod-

.... ei-a.tely fine g;rained, moderately well sorted angular, clear quartz

. . sand; a few.specimene of arenaceous.Foraminifera, possibly of

. ' ' ~ ; _brackish-water or~gin~



110

Like sample at 105 ft., but no Forami~ifera p~esent.

.115

' .p

. ; . i.

125 .. .;,

Clay, light yellowish-green, sandy (fine-grained sand), finely ., graimlar, calcareous ~lay, containing a . very few questionable specimer'ls of arenaceous Foraminifera.
Limestone, cream,hard, slightly sandy; irregularly porous (water. . worn?) ,. containing fra.gments of molds and fragments of im. pressions of bivalves (Pecten sp. and .others) ; a few traces of
specimens of small-Foraminifera, but no determinable species.

"136"
145 '
~- 155

Limestone, white '(chalky), sandy (fine-grained sand), porous

!) (water-worn?), nodular. The .sand content of .the limestone is

, ;t about 25 percent.. The limestone seems to have been originally

highly fossiliferous, but much of the fossil material may have

been destroyed by .percolating water, leaving only a very few

poorly-preserved. fragmenta:ry casts and" molds. .

Lik~ sampl~ 'at 136 ft.

.

Limestone, white; chalky, hard, somewhat sandy, showing a few fragments of fossil molds. '

214

74 GEORGIA GEOLOGICAL SURVEY BULLETIN

D epth
(feet)

Description

165

Like sample at 155 ft.

167

Limestone, deep-cream, dense, cryptocrystalline, somewhat sandy,

showing a very few questionable' sections of microforams.

170

Like sample at 167 ft.

173

Like sample at 170 ft., and, in addition, a few fragments of white,

I

soft, sandy, finely granular limestone.

t

Oligocene Series Upper. Oligocene. Suwannee Limestone.

176

Limestone,- white, very finely granular, slightly sandy, and a few

nodules of deep-cream, dense, limestone. The sample contains a

few fragmentary casts and impressions of fossils, among which

are a f ew echinoid spines, bryozoan fragm ents, and many calcite-

encrusted specimens of smaller Foraminifera. Small-mesh

scr eenings of the sample contain about 10 percent fine-grained,

angular, clear quart zsand.

180

Limestone, similar to the sample at 175 ft., but the fossils are

more abundant, and small calcitic nodules are common. The

fauha contains fragments of echinoid spines and plates; a cast

of Opercu lin ella (?) sp.; many specimens of Dictyoconus cookei;

and a fauna of small Foraminifera.. Among the small Fora-

minifera specimens of Rotalia m exicana var: and Asterigenna

subacuta are the most common species; several species of milio-

..., lids are also present. .

183

Limestone, whit~, calcitic, hlghly microfossiliferou~; many of the

frag'ments contain a large number of specimens of miliolids;

echinoid spines are common, and the foraminiferal fauna is like
that in the sample at 180 ft. This sample also .contains many

small calcitic nodules, and a few fragments of dense brown

3 limestone.



190

Limestone, white, porous, high.ly microfossilifeious, having an

oolitic appearance because of the abundance of molds of speci-

mens of small Foraminifera. The sample also contains a few

nodules of ' light-brown, granular, dolomite or dolomitic lime-

. stone. The .fossil mate1ial occurs, chiefly, as calcite molds that

are usually lime-encrusted. Specimens of miliolids are common,

as in the sample at 183 ft.; specimens of a large Q~tinquelocu

lina sp., and specimens of Asterigerina subacuta are common.

193

Limestone, white, chalky, microfossiliferous, and !1 few nodules of

brown, cryptocrystalline - limestone ; fa1,1na is like that in the

sample at 190 ft.



197

Limestone, white, hard, nodular, somewhat calcitic, slightly porous,

contain-ing a number of poorly-preserved casts of macro-fossils

and microfossils. The material and the fauna are similar to

those described in the ' sample at 190 ft. Asterigerina sp. is the

most abundant microfossil.

' LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

215

Depth (feet)
200
203
.'.
207
21.4 . 218

Description
.Limestone, white, chalky, .porous, microfossiliferous, having an oolitic appearance because of the abundance of poorly preserved molds of specimens of miliolids and other small Foraminifera. The sample contains nodules of calcite, and the fauna is similar to that in the sample at 197 ft.
Limestone, white, chalky,:highly calcitic, somewhat porous, fossiliferous. The fossils a1e very poorly preserved in the form of molds and casts that are usually fragmentary and chalk-coated. The recognizable fossils are the same as those in the immediately preceding samples.
Limestone, white, chalky, porous, highly fossiliferous. The fossils are usually in the form of chalk-coated molds and fragments of molds. Among the common and recognizable specimens of Foraminifera are Aste1-igerina subacta, Rotal1.a.mezicana var.,
, and Dictyoconus cookei.
Like sample at 207 ft. Miliolids are more common in the fauna in this sample than in the sample at 207 ft.; otherwise the fauna is the same.
Like sample at 214 ft.

Middle(?) or lower(?) Oligocene

Vicksburg(?) Group
. i

228 . .

Similar to !i'ample at ' 218 ft. The sample contains many bryozoan fragments; and a few fragments of L epidocyclina sp. Specimens of Asterigerina sp., Rotalia cf. R. mexicana, and miliolids are. commori.

237

Like sample at 228 ft.

247

Limestone, white, hard, highly calcitic, microfossiliferous. The

r

fauna seems to be, in general, like that.in the sample at 237 ft., although few of the fossils are identifiable; Rotalia cf. R. me:~:i-

''

.:.; .;! :.ti .

cana is the most common identifiable species.

,

257

Limestone, porous, highly...fossilifero~s. The fossils are ' usually

poorly preserved in the form of molds and casts. Bryoz.oan fragments are common, and the fauna contains many sp~cimeris of

, . miliolid Foraminifera and Rotalia cf. R . m~x_icana.

.,. ,

267

Like sample at 257 ft. The sample contains several specimens. of

Dictyoconus co.okei, a few fragments of Lepidocyclina ~sp.; and

specimens of small Foraminifera, as in the preceding sample.

276.5 ' 286

Like sample at 267 ft. Specimens of Dictyoconus cookei are common at this depth; the small Foraminifera are like those in the
t sample at 257 ft.
.. Similar to the sampl'e at 276.5 ft. but the limestone is harder and more calcitized; a few nodules of dark-brown dolomite are present. The fauna contains many bryozoan fragments .and abundant sp ecimens of Dictyocan7(8 floridanus; echinoid'_spines and

\

. ,, .

216

GEORGIA GEOLOGICAL SURVEY BULLETrN 74

L

Depth (feet)

Description

fragments are..common.; also occurring are .a few fragments of Pecten sp., several specimens of Lituon.ella floridana and Pseudochrysalidina flw1driria, and spedmens of -two species of large miliolids. ,. l .

296

Limestone, cream, calcitic, poroUs, highly fossWferous. The fauna

seems to be similar to thaUn.:the sample at 286ft. but there.are

.: few well-preserved specimens.

298

Material and fauna like the sample at 296 ft. and, in addition,

many fragments of dark-brown granular dolomite.

300
' ..
305 T ;D.

Dolomite,. dark-brown, granular, composes most of the sample. A few fragments of white-, calcitic, highly microfossiliferous 'lime-
stone are possibly caving from higher levels.
Dolomite, dark-brown, granular, p~ro_p's~. co~poses most of the
sample. In . addition, the ' sam~le contains fra'gments of calcite, fragments of white fossiliferous limestone as in the sample at
300 ft., and fragments of white, ha'rd; sandy limestone showing
impressions of a few fragroimts of macrofossiis (Pecten sp.)

;f

THOMAS COUNTY

" ~-

Owner: City of Meigs, Ga.

GGS. No. 59

Elevation: 340 (approx.)

Total Depth: .1530 ft. - .

,) :



Co
-.

m. ple'te. .d.. :





t:' . ..... .:r

.

9

~ 1 .\ ..' t,-; -

Summary of Stratigraphy

.Tertiary

(feet)

(feet)

Depth . Thickness

Mioc~~~ , undiffere~tiated. , ~--. __ ._ ___:_____:_' ___:_..___ 25

459

.. ...: . ; (1st sample) .

Oligocene

,

.

.: .

. ..upper, Suwanne~ Limestone - - - : ______:_--~~~-'----- . '484

. 102

n;tiddle'('?) or lower(?), Vicksburg(?) Group~----~.:__ 586

80



,.

-- '

.

I

-





"O' ligocen.e ( ?) Eocene .'

orEocene ( ?)

---- ----------~---- ---~--------------~
<

666

149

. upp~r; .'ocala . Limestone, upper memb~r __________ ..;_ 815

?

.. . I1() samples fr,om 8?5 ,to 1320 ft.

. . ,.

, 1.:~

middie ( ?) ,' undifferEmtiated' -----~~--~-

, 1320

to total

. 210 ( ?)

'
4:

. .. . ., . ~. .

~

.... ";: ~

depth



<( .

Lithologic and paleontologic description of cut-!-

tings .and cores. Samples .are . cuttings unless

otherwise stated.

,.

, .... ~,

LOGS OF SEI..ECTED WF,:LLS IN THE COASTAL. PLAIN. OF GEORGIA

217

0- 25 <No samples.

Description

Tertiary

< '

In Miocene Series undifferentiated

.. 25- 55

Sand, clear quartz, angular, coarse-grained, somewhat ironstained,

unfo.ssiliferoils. The sand seems to be contained in a matrix of

red clay.

,

55- 135

Clay,. light-tan, compact, laminated, diatomaceous; a very small amount of fine-grained quartz sand washes from the clay.

135- 157

a Sand, clear quartz, angular; poorly-sorted, somewhat ironstained, and few fragments ofclay similar to sample at 55-135 ft., but

~-

containing fine-grained sand. .

157- 185 .. Clay, tan, highly sandy (fine-grained sand); greenish-gray, unc-

: tuous Clay; and about 50 percent fine-grained, angular, poorly-

sorted, clear quartz sand.

185- 2os
.. . '

Clay, in part, gray and, in part, tan, sandy (fine-grained sand);

about 50 percent poorly-sorted, angular, clear quartz sand; a few

nodules of .l.i'm<inite, and a few fragments of white sandy lime-

stone.

\

205- 246

Limestone, cream, hard, sandy (fine~grained sand); a small amount of greenish-gray clay, and angular, fine-grained sand, no fossils.

246- 270 No samples.

270- '289 nr . Limestone, cream, highly sandy (fine-grained sand), co~tainipg a

ti! . few impressions ..of fragments of microfOSf!ilS, and .a few indis-

' .;tinct sections of m'olds of specimens o{ Fo'raminifera. About 10

. .~
28'9- 293

. percent of .th'e washed sample is composed of poorly-sorted clear

-quartz sand.





l,ik~:sample at 270-289 ft..

293- 302 Like sample at 270-289 ft., but about 50 percent of sample is un-

>.

. consolidated; apgular, clear quartz sand; no. fossils.

. 302- 312
~ .l
312- .320

Like sample at 293-302 ft., and also a few fragments of greenishgray sandy clay.
No samples.

320 334
' :~

Like sample at 302-312 ft., but about 75 percent of sample is fine to coarse-grained, angular, clear quartZ sand. .

334- 346
346- 365
. ; ..
365- 388 388! 4l;7

No samples.
Limestone, cream, hard, sandy, containing fragments of molds, and impressions of fragm ents of fossils. One chip of limestone show-
'"' ed a few fairly well preserved sections of Archaws sp. Abo.ut 25
percent of the ~ample is composed of fine-grained sand and a little tan Clay.
.No samples. Sand, quartz, ,angular, very poorly..sorted; a f'ew fragments of

\

I

218

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

cream, argillaceous sandstone; a few fragments of sandy limestone like sample at 346-365 ft., no fossils.

417- 459

Limestone, cream, irregularly sandy, a few fragments of which

show indistinct impressions of fossils. About 25 percent of the

sample is composed of coarse-grained quartz sand.

462- 484

Limestone, hard, sandy, irregularly porous, containing a few im-

\I

pressions of fossils, and a few hard greenish-gray areas. About

t

10 percent of the sample is composed of unconsolidated quartz

sand.

.

.

484- 511 511- ' 586

Oligocene Series

Upper Oligocene. Suwannee Limestone~

Limestone, cream, hard, porous, somewhat glauconitic, highly

microfossiliferous. Macrofossils are, chiefly, fragments of Pec-

ten sp. and echinoid spines. Among the many poorly-preserved foraminiferal specimens, the most com~on species are Rotalia mecatepecensis, Asterigerina subacuta, Gypsina sp., and a fr~g-

(,; ment of L epidocyclina sp.

,

Limestone, white, hard, containing many specimens of Lepidocy-

clina undosa, Camerina dia, Elphidium cf. E. Chapmani, and

Asterigerina subacuta.

.-

Middle(?) or lower(?) Oligocene.

Vicksburg(?) Group.

586- 606

Limestone, white, gray-spotted, hard, nodular, highly fossiiifero~s.

Macrofossils are, chiefly, bryozoan fragments, echinoid spines

and crab claws: Among the microfossils,' the common species of

Foraminifera are L epidocyclina undosa, Camerina dia, Asteri-

.I

gerina subacuta, L epidocyclina mantelli, Rotalia m ecatepecensis,

Elphidium cf. E. chap11tani, Asterigerina sp., Cibicides choctaw-

ensil, and Eponides alabannensis.



..

606- 632

Limestone, cream, nodular, in part fineiy crystalline, and about 10 percent coarse-grained quartz sand. The fauna contains echinoid spines, specimens" of Ro,talia .sp. and Asterigerina sp., a few specimens of Camerina sp. and a few small fragments of Lepidocyclina sp.

605- 620

Core. Limestone, white, chalky, gray-spotted, microfossiliferous, partially calcitized. The fauna contains many echinoid spines, and specimens of Rotalia mecatepecensis a!J.d Asterigerina subacuta.

. 620- 641

Core. Limestone, deep-cream, gray-spotted, hard, porous, partially calcitized, highly fossiliferous. The limestone seems to have been altered by percolating.water. The fauna, which is similar to that 'in the samples starting at 586-606 ft., is characterized by large echinoid spines, specimens of Rotalia mecatepencensis, and poorly preserved specimens of L epidocyclina sp., Camerina

LoGs OF SELECTED WELLS IN THE CoAST.Ai. PLAIN OF GEORGIA

219

Depth (feet)
641- 666

Description
sp., and Massilina sp. Many of the core fragments are composed of brown, coarsely crystalline dolomitic limestone that shows few traces of fossils.
Core. Limestone, light-brown, hard, crystalline, containing soft, chalky, very poorly preserved molds of fossils fragme:nts. The fauna, which contains traces of Lepidocyclina sp. and Rotalia sp., seem~ to be related to the fauna in the sample at 620-641 ft.

Oligocene (?) Series or Eocene (?) Series Middle (?) or lower (?) Oligocene or upper (?) Eocene.

666- 688

Core. Limestone, white, hard, calcitic, containing many poorly preserved traces of microfossils but no determinable forms.

688- 727 No samples.

727- 753

Limestone, brown, crystalline; a little water-worn(?) chalky, lime-

stone; a few fragments of thinly laminated gray-green shale;

\
'

and about 20 percent coarse-grained sand. The sparse foraminiferal fauna contains specimens of Camerina sp., Asterigerina sp.,

~ . Lepidocyclina sp., and other species, like the samples starting

,, ... .
753- 770
~ (".~

at 586-606 ft. Some of the cuttings in this sample, and possibly \. :': all the fossil material, may be ~aving from higher levels .. Like sample at 727-753 ft., with the addition of nodules of limoil.ite.
The sample may be composed entirely of cavings.

.770~ 796 1 Core. Dolomite, light-brown, granular, conta:ining abundan~ traces

of chalky microfossils, all of which are too poorly preserved for identification. >A_: part ' of the cbre is composed of dense, .very

finely granular dolomite that shows no trace of fossils.

796- 815. Core. Dolomite, brown, hard, dense, very f~nely graiJ,ular; no 'fos- -

sils.

1 . ; Eocene .Seri.es

'815- 835 ' 835-1320

Upper EO:Cene. Ocala Limestone. Upper Member.
Core. Limestone, cream, chalky, contai~ing mariy specimens of Foraminifera. The common..species are Cibicides ocalanu,s, Rrrbulus alato-limbatus, Uvigerina dumb lei, Dentalina jacksoner;sis, Reussella sculptilis, S -iphonina _jacksone?tsis, C1-ibrogloborotalia marielina, Operculina mariCLnnensis,' A~omalina bilateralj_s, Robulus sp., Eponides jacksonensis.
No samples. '
Middle(?) Eocene. Undiffe-rentiated.

1320-1630 T.D. Sand, clear quartz, moderately fine. grained, angular, highly glau-

"

conitic; containing fairly numerous specimens ofsmall Foratr~ini-

..;- ~-, ,.,.. - fera and Ostracoda. Among the specimens of Foraminifera are

- -~ ,; ..,.

Robulus alatrr-limbatus, R. alabamensis, R_. cf. R. pseudo-mam#- .

-h' ... . . ,

ligerus,-Text1tlaria dibollensis, Globorotalia crassata densa, Val-

~ ~

> " vulineria persimillis, Globigerina rotunda var., Coleites sp.,. and

others.



220

GEORGIA GEOLOGICAL SURVEY BULLETIN 74 .

WAYNE COUNTY

Operator: The California Company

GGS. No. 52

Landowner: Brunswick Peninsula Corp. Elevation: 73 ft. (derrick

Well 1

.

floor)

Location: Land Lot 7, Williams Survey_ Total depth : 4626 ft.

625 ft. from south line ; 2500 ft. from Completed: Dec. 17, 1944.

west line of Land Lot 7.

.. -

Summary of Stratigraphy Tertiary

,.
Dept h _(feet)

Thickness . (feet)

Not reported

Cretaceous

Gulf
Beds of Navarro age ------------------------------------------- 2862 Beds ofTaylor' age ------ -----------------'--7--------~~------- 3497? Beds of Austin age ____---------------- - ---_ ______ 3571 . AtkinsonFo:rmation, upper member______---:-.--_ 3889
lower member______ ;_~-- _- 4308

635? 74
318 ' .411594

Comanche undifferentiated _______ __,___.____-_ _ 44'62

164

':s

Pre-Cretaceo~s( 1)

'

"J . .... : .' ,

to

Arkosic quartzite ------------------~-----.:.::.:...__c:.~--~----------L- 4570 total . 56



'

depth

Lithologic an~ paleontologic description of cut-

!
l

tings and.. cores~ S~mples . are .- cuttings unless .

otherwise stated.

. ,

D e p th (teet)

Description

; !

0-2856 Samples not _reported.

-1,I.

2856-2887

Cretacoous
Gulf,Series
I .
Beds of Navarro age

Sample is a mixture of sand, sandstone, gray sandy marly shale,

and limestone, that are probably mostly caving. However, specimens ' of Globotrimcana cretacea, Gum~ elina striata, .and Gii1n-

belina carseyae indicate the Cretaceous age of the beds. The

top of the bed~? of Navarro age is placed at 2862 ft. on the basis

of electric log correlation.



-

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN OF GEORGIA

221 :

Depth (feet)
2887-2903
. 2903-2990 2990-3000
3000-3011
3011-3071 3071-3086
3086-31.02'
3102-31,18
3118-3146 3146-3191 3191-3201 3201-3215

Description

-Mainly fragments of cream, chalky limestone (Tertiary); 'fragments of light-gray, extremely fine-grained, calcareous micaceous, glauconitic sandstone; and some 'fine to coarse-grained loose sand. A few specimens of Navarro species of Foraminifera are in.the sample.
No change. The quantity .of loose sand in the samples below 28562887 ft.. decreases progressively with de'pth,

Core 4. Recovery ? Part A. Siltstone, slightly argillaceous, micaceous, carbonaceous, glauconitic, which grades into extremely fine-grained
sandstone; contains specimens of Globotruncana cretacea, Gumbelina striata, and other Navarro species.

Part B. Like part A, but sand is slightly coarser grained, and specimens of Foraminifera are slightly more aBundant; 'Globo- truncana and Giimbelina are dominant.

Part C. Like part B.

Sand, very fine to moderately fine-grained, loose, quartz; many fragments of buff to pink chalky limestone (caving); fragments
': of extremely fine grained sandstone (several types, caving from higher levels); nodules of glauconite; fragments of gray marly shale; specimens of species of Foraminifera as in the preced~g samples.

No change.

Materials like sample at 3000-301--1 ft.; specimens of Robulm sp. also in the microfauna.

No samples.

C' or~

.
5-:

Recovery?

Part A. SandstOne, brownish-gray, hard, dense, silty to extreme-

ly fine grained, micaceous, glauconitic, highly calcareous; con-

tain-s a fauna of small specimens of species of Foraminifera that

are i10ndiagnostic, for the most part; a few typical Navarr()

species occur in the sample.

Part B. Like part A.

Part C. Sandstone, gray, very fine grained, argillaceous, micaceous, somewhat glauconitic. Common species of Foraminifera are Globotruncana cretacea, Gumbelina striata, and Gumbelina carseyae.

Washed _residue, small. Like sample at 3000-3011 ft.

No change.

No sample?

Core 6. Recovery? Part A. Sandstone, greenish-gray, extremely fine grained, argillaceous, calcareous, micaceous, glauconitic. The microfauna consists, mainly of specimens of Globotruncana cretacea, Gumbelina spp., Pseudote:r:tularia elegans; fairly common specimens are D.orothia bullet_ta and' Clavttlinoides trilaterus; several arena-

''

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)
3215-3221 t
3221-3283

Description

ceous species of'Foraminifera characteristic of the Navarro-also occur.

Part B. No change.

Part C. Clay, gray; highly sandy (very fine grained sand), micaceous, calcareous. Fauna like part A of this core.

Part D. No change.

.

.

Sand; fine t~ coarse-grained, and many fr-agments of extremely

fine grained micaceous sandstone and highly sandy clay; nodules

A: of glauconite; cavings.:.of buff. to pink 'chalky limestone; micro-
fauna .like part of core _6 _at 3_2~1-3215 'ft. .



-





..f -

'

~.

j

No change.

,

3293 """' . ~ . .;

Bit sample.

"

Clay, gray, sandy, micaceous.

1

3293-3309

Core 7. Recovery?

:"" -!'~"'

." . ~ 1

3309-3325

Parts B, C, and D. No change.

~



--

'

'~

"

t

I .

. "" . ' 1 ...

Very small sample, composed 'of fine to moderately fine grained'

sand; a few fragments of very fiii"e grained micaceous sand-

stone; fragments of the buff to pink chalky limestone; and a

f ew specimens_of Navarro species of Foraminifera.-
3325-3358 ' Lik~ sample at S3Cl9~3325-':ft.,' ;iu~ the a~ditfon of afew fragments

of gray marly shale. A few specimens of .Globotruncana forni-.

cata are added to .the microfauna. . . ~ . , ..

.:<n ":' ~ -Jo :. , _: ; .: - ~(. : 'N . ....,~""'' .~:)t.; ~..,ov.~ ~..; -~

! .....~ . J;-;~ -.J ,-:: .:.

' -.~
-~- ' :~:t~

' 3362-3374

Core 8. Recovery?

,., ''

,.,1

Part A. Shale, gray, silty, somewhat, micaceous, calcareous. .

Microfauna like core 7 at 3293-3309 ft. 'With the addition of ~pe~i

-; ;

. . '1,;

.~'e tns

of

Glob..o~- ~tr'!u n, .~can.. a..

sp.,

ana sinr~plf!cta:mmina

,.1

'

. . .... .. . :.

s~icompu;:,

-~-.~;:. ~

. ~ !~,}'"' 1}~ a . . . . : ,, . .. .. . - -; . -1 . .

.. ,~:-. ~

~h)(: ;

Part B. Shale,. gray, somewhat sandy (extremely fine grained

. ._,_ .,.~

c. ' .. '-.:; ~and), micaceou_s, high,ly cal~areous. Fa~na I_ike part A.

Part No chang~. - .. . . - . . t '

. .

3374-3376
_, <lt:

337"6-3427

..f' ;: . ;

.

Shale, gray, micaceous, somewhat silty, -and . a little loose, finegrained sand; mi(!rofaui).a like_part ,A ,of_.core. 8 at 3362-3374 ft.
Shale and sandy shale like samp.le' at 3374~3376 ft., and about 50 percent fine-grained sand~ !'Jo change in fauna.

3429-3444

.Core 9. Recovery? . '

'"

.

. - p;irt A. Shale,'gray, inicilcei>u~,"silty;a:rid ' thin' lenses

. . . 1.,. of' light:

i

gray, fine-grained sandstone. No change in fauna. :.: - ' ;;

Part B. No change.

--' r ,. ''r

:' { ::;< : :

! ' r-
3444-3460

Part C. No change.

. .,: '"- .. _.;: -:~

; t . . .. lH..~ . <: ..

,, )

Marl, green, somewhat sandy,.micaceous ; fragments of light-gray,

. fine-grained sandstone ; about 25 percent' of sample is loose~ fin e-

. grained .~and.

.

'

'

3460-3495 No change. .

.i

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN QF GEORGIA

223

Depth
(feet)

Description
Beds of Taylor age .

3497-3510

Core .10.. Recovery?.

Part A. Mad, tgray, hard, in part highlr sandy (fine~grained

Sand) : . ..

. :~

Washed residue composed almost entirely of specimens of Fora-

minifera: Common species are: Globotru-iicana spp., Gumbelina

spp., Loxostoma cushmani, Eouvigerina gracilis, Heterostomella

americana. . The microfauna indicates the Taylor age . of>the

beds..~

,.

Shaie, gray, marly, niica~eous' ; a little fine-giafned sand :and firie~ giafned, argillaceous sandstone. Fauna li-ke core 10 at 3497-3510

I ..'

-I

ft.

'3526-3540 '!-'" Like saniple at 3514-3526 ft.~ With the fi<lditiOn Of many fragments

of Inoceramus. The microfauna contains specimens of Planulina

spi15socostata, Pirinulina dumb lei; andGloborotiilites conicu8, a

typical Taylor fauna.



'3540-3571 -~. No change. '

.' ... '

3571-3587

Beds '.of Austin' agil' .
Like sample at 3540-3571 :f"t:, wtth.the additi.on of many fr~~eritS
of white hard chalk highly i.inpregnated .with specimens of Oli-
gostegina. .The chalk is typically .-Austin in character, and the speci~ens..~f- Oligost~gina a~e typical of. the top of the beds of
.. AU.Stin age .in .many . w.ells in southern . Georgia and northern
Florida.' .: . ,. .. "'

.3587-3!)02 , , Like sample at 3571-358~ ft.

.361,~-3626 . , Core 11. Recovery?

,. .

. ..

'

" Part A. . Chal.k, gray,' hard, like the.\ vh.ite chalk in the samples : from 3571 to 3602 ft. Dominant species in the microfauna are:

Pseudoclavu:linci moorevillensis (characteristic of the upper part

.. .. of the outcropping Mooreville Limestone in Alabama and Missis-

sippi)', G.loborotalites umbilicatu. .s, .Planulina texana.

. Part B. ~4?: c~ange.

Part C. No change.

Part D : Chalk -like- part A, but softer, alld leaving a washe_<;l. residue . composed almost entirely of Inoceramus prisms and specimens of Foraminifera: ( ,. Characteristic species are: I ,.., Pseudoclavulina moorevilknsis Neoflabellina suturali8
- Ammobaculites subplanatus Gaudryina. austiniana Pseudoclavulina clava.ta V entilabrella eggeri' Kyphopyxa christneri ,:. : .Planulina texana

.ZA

224
Depth (feet)
3626-3632 3632-3642 364?-3693 3693-3738 3746-3760
3760-3776 37763823 3838-3847

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Description

Gl()borotalites ttmbilicattLS Robulus pondi.

The fauna indicates the upper part of the beds of Austin age.

Sample is mainly cavings, composed of gray sandy marl, light-gray

sandstone, and loose sand. Some specimens of Foraminifera are

like those in core 11 at 3612-3626 ft.; others .are cavings from

higher levels.

.. '

Like sample at 3626-3632 ft., and fragments of the hard gray

chalk r eported in core 11 at 3612-3626 ft.

Mainly fragments of hard white chalk and hard gray chalky marl;

a little sand, gray marl, and sandy marl, probably caving from
higher levels ; many Inoceramus fragments and prisms. The microfauna is mainly a mixture of specimens caving fr~m high~r

levels.

Like sample at 3642-3693 ft., with the addition of a few fragments

of dark-gray flaky shale. The washed sample at this depth is

much smaller than the immediately preceding samples, suggest'" ing that the shale, which washes out, probably was the largest

part of the unwashed sample.



Core 12. Recovery?

Part A. Marl, gray, hard; and light-gray, hard, dense, highly

microfossiliferous, slightly sanay limestone, composed of a mass

of microfossils, small fragments of macrofo.ssils, and Inoceramus

(. prisms. The microfauna is, mainly, smalf specimens of Globi-

gerina cretacea, Gumbelinci globulosa, Planulina austiniana, and

a. few specimens of Eouvigerina ,sp.



Part B. Limestone, gray; hard, ma'rly. Fatma.like partA;above. .

Part c. Like part B, and containing a few fragments of Citha-

rina texana var. and a few specimens of Dorothia alexanderi. A

similar ~auna occurs in the Ector Tongue of the Austin chalk in

Texas.





Part D. Limestone, 'gray, hard, marly, containing abundant specimens of Oligostegina that occur in the lower part of the beds of Austin age in many welis in southern Georgia and northern Florida.
'Clay, gray, shaly; gray sandy shale; light-gray sandstone; and loose sand. The material and the microfauna are probably caving
from higher levels.

Washed sample, small. Like sample at 3760-3776 ft., but contains

a little dark-gray marly shale: No marked change in micrdfauna.

Core 13. Recovery?

Part A. Limestone, gray, hard, marly. Specimens of Citharina

texana are fairly common; otherwise the microfauna is similar

to core 12 at 3746-3760 ft.

'

'

Part B. Like part A. Part C. Shale, gray, marly. The washed residue cont~ins frag-

p. .

. . -X

LOGS OF SELECTED WELLS IN: THE COASTAL PLAIN OF GEORGIA

225

Depth (feet)

. Description

. ments of the gray shale, many Inoceramus fragments, fragments

of Ostrea sp., and specimens of . Foraminifera and Ostracoda.

',".

Common in the fauna are: Globigerina 'cretacea, Globotruncana

:,~

spp., Planulina austiniana, and Dorothia alexaW:leri.

;~.';';-
.3849-3859 Washed residue, small; composed of dark-gray, soft, marly shale,

and a little fine-grained san_d that may be caving. The material

;_1.'".

drilled is probably dark-gray, waxy, calcareous shale. No change

in microfauna.

3859-3877

No change.

3889-3899 3899-3920 3930-3944 -
,: ~ '1
3944-3950 3950-3960 3960-3972
3972-3~87
3994-4004
4004-4013

Atkinson Formation. Upper Member.

Shale, dark-gray, soft; fragments of light-gray, very fine-grained sandstone; a little coarse-gr~ined quartz sand: Fragments of gray flaky shale, lignite, and fine to moderately fine grained
sand are common.

No change.

Core 14. Recovery? Part A. Shale, gray, flaky, that seems to be lenticular in light~ gray, very fine grained; micaceous, somewhat carbonaceous sandstone. A little carbonaceous -material also occurs in the shale,
and a few brown irregular-shaped nodules of siderite are present. The microfauna is compo-sed of a few specimens of ostracodes, and specimens of Globigerina cretacea var., Gumbelina sp., Val. vulineria infrequens, and-.Ammobaculites sp.

'Part B. No :change: .

Shale, dark-gray, flaky, slightly carbonaceous, and fragments of
brownish-gray, very fine grained micaceous sandstone; a few speci~ens of Foraminifera and .Ostracoda.
Like sample at 3944-3950 ft. Fr~gments of g~ay flaky shale are
more abundant.

Like sample at 3950"3960 ft. Many of the shale fragments are

thinly flaky and smoother in texture than in the preceding sam-

ples.



Like sample at 3960:3972 ft.

.Core 15. Re2overy? Part A. Marl, dark-gray, hard, containing fragments of Ostrea sp. and fish scales. Specimens of Foraminifera common in the sample are: Globigerina cretacea, Gumbelina moremani, Gumbelina reussi, Neobulimina sp., Valvulineria infrequens, Planulina eaglefordensis; other species are: Globotruncana sp., and fragments of Citharina texana.
Part B. Like part A, but contains no specimens of N eo-bulimina sp.

Part C. No change.

Shale, dark-gray, marly, fl!).ky, and fragments of light-gray, fine-

226

GEORGIA GEOLOGICAL SURVEY BULLETIN 74

Depth (feet)

Description

grained, micaceous sandstone containing fragments of Ostrea sp. and a micri>fa.una like core 15 at 3994-4004 ft.

4013-4081 '

Washed sample, small. Composed mainly of fragments of gray and some greenish~gray flaky shale, and fragments of light-gray,
:fine-gra.ined, micaceous sandstone. The microfauna is 'like core
15 at 3994~4004 ft. .:

4081-4096

. ' This sample seems to mark a change from the deeper-water rna- rine facies of the upper Atkinson/ above, to the shallow-water marine facies, below. The electric log indicates that the change in facies is at 4060 ft. The sample is composed, chiefly, of fragmen.ts of .light-gray, dense, very fine to fine-grained, micaceous sandstone, many fragments of lignite, ani a little shale like the samples .just above.

409_6-4112
' "{ . ' 1' . ' .

Core 16. Recovery'!

Part A. Sandstone, clear' quartz; fine-grained, moderately even

grained, angular, micaceous, somewhat pyri..tic. .

.

Part B.. Sandstone, clear quartz, fine ~ to moderately coarse

:grained, micaceous; and greenish;gray, flaky,. smooth-textured

. shale containing a few fragments of 'ligt:lite. ~

4112-4124 .' Sandstone,- white,. and a . little olive-green flaky shale like core 16 Itt ., at 4096:4112 ft.; also cavihgsOf shah~ and sandstone from higher
levels.

of' 4124-4139 :Like sampfe at 4112-4124 ft. with the' addition of a few coarse

f ": i. .1 ~ "' < grains.' Clear quartz sand.

' '

4139-4155

Sand, coarse-grained, 'clear' quartz; and fine~irained, dense, mica-

ceous, clear quartz sandstone; gray .and . greenish-gray flaky

shale'; many fraginelits of lignite. ..

4155-4171

Core 17. 'Recovery?

,

Part A. Sandstone, clear quartz, moderately _ fine and even

grained, Joosely consolidate'd, micaceous.

Part B. Sandstone, hard, dense, moderately fitie grained, some-

wnat uneven grained; conglomeratic, containing many fragments

... of carbonaceous material, nodules' of .. gray clay, fragments of

greenish-gray shale, quartz pebbles, and nodules of limonit~. .

4171-4188

Shale, gray and green!sh~gray, flaky; also coarse-grained quartz

sand; lignite; fragments of the conglomeratic sandstone reported 1

.in core 17 at 4155-4171 ft.

4188-4209
.

No

' '(" .

.

c.hai:f.g.e. ).

4209-4221 ' Core 18. Recovery?

Part ' A... Sandstone, light-gray, very hard, dense, fine-grained to

silty, .c'ontain!ng n1any highly micaceous lenses, and a few lenses .

,.

of gray flaky shale. '

'

Part B. Sandstone, white, lo.osely consolidated, uneven-grained,

silty, micaceous.

4227-4242 Shale, gray, flaky; and fragments of white, fine-grained sandstone;

a few shell'fragments.

., .

<, [ ~-

I

LOGS OF SELECTED WELLS IN THE COASTAL PLAIN l?F GEORGIA

227

Depth (feet)

Description

4242-4253 r Shale, gray, flaky, and many fragments of white, moderately coars~ grained, highly fossiliferou~, calcareous sandstone.

4253-4260

Core 19. Recovery?

. : :

Part -A. Sand, Clear quartz, fine-grained, even-grained, angular;

: .also.fragments of .gray flaky shale; containing many small pieces

of carbonaceous material and ,a trace .of mica.

,_,.,. .-

Part B. Like part A.

, ... J

~- . ' . Part C. . Sand, clear . q~artz, fine. to moderately fine. grained,

,'

angular; also many fragments of. carbonaceous material, and a

few shell fragments. .

Part D'. Sand, clear ' quartz, fine to moderately fine grained; also many fragments of gray, flaky, slightly mic_aceous, car-

-'

_bonaceous shale .that seem to be embedded in the. sand.

4260-4269

Shale, gray, and fragments of white, hard; highly microfossiliferous, calcareous sandstone; a few: fragments of lignite.

426.9 - 4308 .'~,: . ,; !

.. No change.

.:':'i ~



-~ Atkinson Formation.

.,~
Lower Member.

4308-4325 . Core 20. Recovery?

Part A. Sandstone, .light-gray, dense, fine-grained, micaceous,

So!neWhat glauconitic.

'

..~

.

. '~l .,,. - . .:., PartB: Lhn"estoil~, light-iiray;.J. vel-y bard, dense, miCrOfossili-

ferous; contains a few fragments of carbonaceous material, and

is partially dolomitized.



Part C. Fragments of limestone' like part A, and many frag-

. ments , of greenish-gray, _micaceous ~iltstone, .containing . abun-
of a s: ..~ ~.~ ~ : ,' d"&.n-t ;_~Orn and broken shells ot foSSn biv3IveS,J. a few molds of . smali gastropods, a trace . gHiuconite, few 'phosphatic nodules, _

and shreds of carbonaceous material.





. :"t . ,.., ,, .

I

. ,

~ ~ai.-t D. Sh8Je, gray, micaceous, containing much carbonaceous

,1 ,,

material; fish scales,' many fragments of an Ostrea-like bivalve;

and a few lenses of light-gray, sandY' shale in which the sand

is very fine g'rained;- . ,





. 4325-4331;;".1 ,-. Shale, greenish~gray, and white, hard, fossiliferous limestone.

4331-4347

No change.

' ~~ -~ ' :.'

4347~4359 .1 . Like the preceding sainples of Hie lower -Atkinson, but shale frag-

ments are relatively more'' abundarit. The microfauna is com-

posed of a few Specimens of ostracodes, and a few specimens of

'Ammobaculites agrestis and other species characteristic of the

so-called "marine shale" of the Tuscaloosa.

4360-4371

Core 21. Recovery? .Part A. Sandstone, gray, hard, silty to very fine grained, micaceous.

!)rt B. Shale, gray, hard, sandy, micaceous, containing niany

.. '...

: . fragments of Ostrea-like bivalves.

228

GEORGiA GEOLOGICAL SURVEY BULLETIN 74 /

Depth (feet)

Description

Part C. San-d, -clear quartz, fine to coarse-grained, micaceous;

..

and many fragments' of light-gray, soft, micaceous, finely car-

:. :

bonaceous siltstone,

Part D. Sand, clear, quartz, fine to coarse-grained and frag-

ments of very fine grained, micaceous, somewhat glauconitic

sandstone containing worn fragments of Ostrea-like bivalves

.-~ - -

and a little carbonaceous _material.

4371-4380
,4380~4389

Sandstone, light-gray, hard, dense, calcareous, containing worn and broken fragments of -microfossils; also cuttings of gray and greenish-gray flaky shale. _
Sandstone, gray, dense, highly micaceous;. and gray and greenishgray shale.

4389-4419

Like sample at 4380-4389 ft.; but shale fragments are dominant.

4419-4437 - Core 22. Recovery?

_

Part A.- San-dstone, dark-gray to black-streaked, very fine grain-

ed, highly micaceous, argillaceous.



<.Eart B. Like part A, and a little loose, coarse-grained sand.

Part C. Sand white, loosely consolidated, fine to very coarse

grained, micaceous.

.,~,:~

Part D. Like part C.

. .'

4437-4449- Sand like part C and part ~ of core 22 at 4419-4437 ft.

'

4449-4462

Like sample at 4437-4449 ft. The sand contains a few yellowish-

. . ~;

'-c green grains.

-~~

!f:

Comanche Series undifferentiated

4462-4477

Like sample at 4449-4462 ft. Greenish-yellow grains are common in-the sand, which al~o contains many pink grains.

4477-4497

Core 23. R,e_covery?

'

. '

Part A. Shale, bard,. mottled, gray; mustard-yellow, purple, and reddish-brown, micaceou's, unctuous; contains small siderite

~~
I _.-

spherules.

Part B. Like part A; siderite common. J

Part C. Like part ,B, a,nd white, fine to coarse-grained, cl!lYcemented, clear quartz sand.

Part D.. Clay, JJ1Ulticolored, hard; and fine to coarse-grained

.'-

sand;. abundan,t siderite spherule-s. ( - t. -

.~. .

4497-4506

Like core 22 at 4477-4497 ft., and a few fragments of pink and white, moderately coarse-grained, calcareous sandstone.

4506-4515

Like sample at 4497-4506 ft., ani!- many fragments of pink sandstone .

.4515-4529

Sand, fine to very coarse grained, clear quartz, and fragments of multicolored shale. The sand contains many greenish-yellow and pink grains.

4529-4544

Sand, similar to sample at 4515-4529 ft., but is composed mainly

D epth (f eet)
4555-4575
4575-4585 4585-4595 4595-4604 4607-4616

229 .

Description

of white and yellow grains and a little white feldspar; also a

little multicolored shale.

Core 24. Recovery? Part A. 2 ft. Sandstone, pinkish-white, loosely consolidated, fine

to moderately coarse grained, somewhat calcareous, cemented

with white bentonitic clay; pink-tinted and greenish-yellow

grains are fairly common.



Part B. Like part A, but sand is mostly coarse grained.

Pre-Cretaceous(?)
The top of the pre-Cretaceous (?) rocks is placed at 4570 ft. on the basis of electric log correlation, supported by sample data. Like core 24 at 4555-4575 ft., and also fragm ents of reworked and
weathered "basement" rocks. Like sample at 4575-4585 ft., but the reworked and weathered
''basement" material is dominant. Pink and gray arkosic quartzite. Top of black "basement" material; igneous rock?