OFFSHORE MINERALS ASSESSMENT STUDIES ON THE GEORGIA CONTINENTAL SHELF - PHASE 2: 
Seismic Stratigraphy of the TACfS Area and Evaluation of Selected Sites for Economic Hard Minerals Potential 
by VemonJ.Hemy and Faisal M Idris 
Department of Natural Resources Environmental Protection Division 
Georgia Geologic Survey 
Project Report No. 18 
 
  OFFSHORE MINERALS ASSESSMENT STUDIES ON THE GEORGIA CONTINENTAL SHELF - PHASE 2: 
Seismic Stratigraphy of the TACTS Area and Evaluation of Selected Sites for Economic Hard Minerals Potential 
by 
Vernon J. Hemy 
and Faisal M Idris 
Prepared in cooperation with U.S. Minerals Management Service under MMS Agreement No. 14-35-001-30496 
This report has not been reviewed for conformity with Georgia Geologic Survey editorial standards and stratigraphic nomenclature. 
DEPARTMENT OF NATURAL RESOURCES Joe D. Tanner, Commissioner 
ENVIRONMENTAL PROTECTION DIVISION Harold F. Reheis, Director 
GEORGIA GEOLOGIC SURVEY William H. McLemore, State Geologist 
Atlanta, Georgia 1992 
Project Report No. 18 
 
  TABLE OF CONTENTS 
PART I. SEISMIC STRATIGRAPHY OF THE TACIS AREAS, GEORGIA CONTINENTAL SHELF 
ABSTRACT ............................................................................................................... ............................ 1 INTRODUCTION ... .. .... .... .... .. .... .. .... .. .. .. ........ .. .. .... .... .... .. .. .... ........ .. .... .... .... .... .. .... .... .. .. .... .. .. .... .... ..... 2 LOCATION .......................................................................................................................................... 2 OBJECTIVES .................................................................................................................. ... ............ .. ...... 2 DATA ACQUISffiON ...... ............................. ................. ................................................... ........ .......... 2 
Seismic Data ....... .... ........ .. ...... .... .. .. .. .... .... .. .. .... .... .... ...... .. .. .. .. .. .. .. .... .. .... .. .. .. .... .... .. .. .... ........ .. .. .. .... . 2 Boreh.ole Data................................................................... ............................................................... 4 DATA REDUCTION AND STRATIGRAPHY ANALYSIS ................................. ........ .. ............ .. ..... 4 SEISMIC STRATIGRAPHY OF THE TACIS AREA ...................... .... ... .. .. .. .. .. .. .. .. .. .. ... .......... ..... .... .. 5 General Statement ... .. ...... .. .. .. ...... .... ...... .... .... .. .. .. .......... .. .. ........ .. .. .. .... .... .. .. .. .... .... .... .... ...... ........ ... 5 
Eocene ............................................................................................................................................. 5 Oligocene ........................................................................................................................................ 13 Miocene ..................... .. .................. .. .... ........... ................................................................................. 13 
Lower Miocene ......................................................................................................................... 13 Middle Miocene ..... .... .............................................................................................................. .16 Upper Miocene ....................................................... ...... .......... ...................... .... ........................ 16 Pliocene ................................................................................... ............ .............................. .... .... ...... 22 Quaternary ................................................................................................................................. .. ...22 REGIONAL GEOLOGIC FRAMEWORK ........................ .. ............. ..... ............... ........ ... .................... 22 Structural and Topographic Features ........................................................................................... .22 Stratigraphy .................................................................................................................................... 26 Eocene ....................................................................................................................................... 26 
~8:~~~ .: ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: :: ::::::::::::::::::::::::::::::::::::::::::::~~ Lower Miocene ........................................................................................................... ....... .28 Middle Miocene .............. ... .............. ................................... ..... .. .......... ............................... 28 Upper Miocene ....................... .... ........................................................................................ 29 Pliocene ................................................................... .................................... ..............................29 Quate~ ............. ............ ........................................................................... ............................ 30 CONCLUSIONS ............... ........... ..... ............. ... ....... ... ......... ... ............................ ........ ........ .................. 30 
PART IT. EVALUATION OF SELECTED SITES FOR ECONOMIC HARD MINERALS POTENTIAL 
INTRODUCTION ................................................................................................................. .. ............. 32 DATA ACQUISffiON ............................................................................... .......................................... 32 Gamma Isotope Mapping ...................................................................... ............... ...... .. ............ ......... 32 Vibralift Coring ......................... .. .......................... .. ....... ....................... ............. ................................. 35 DISCUSSION ............................................. .......... ..... .. ....................................... ... ................................ 35 CONCLUSIONS AND RECOMMENDATIONS .............................................. ............................... .52 
REFEREN'CES CITED ......................................................................................................................... 54 
iii 
 
 UST OF FIGURES 
FIGURE 1. Location of Study Area TACTS Borings (A-H). Other Borings Used in the Study,Target Areas (A1-A5),Seismic Tracklines and Bathymetry........................................... 3 FIGURE 2. Legend and Seismic Profiles Along TACTS Lines 1 and 2. ............. ........ ...... .. .. .. .. ...... .... 6 FIGURE 3. Seismic Profiles Along TACTS Lines 3 and 4. ........................................................ ...... .. .. 7 FIGURE 4. Seismic Profiles Along TACTS Lines 5 and 6. ........... ........ .. .. .. .. .. .. .... .. .. .. .... .... .. .. .. .. .. .... .. . 8 FIGURE 5. Seismic Profiles Along TACTS Lines 7 and 8. ........................................................ .... ... .. . 9 FIGURE 6. Seismic Profiles Along TACTS Lines 9 and 10................................................................. 10 FIGURE 7. Seismic Profiles Along TACTS Lines 11, 12 and 13.... ............................ ........ ................. 11 FIGURE 8. Panel Diagram Showing Seismic Stratigraphy of the TACTS Area................................ 12 FIGURE 9. Structure-Contour Map of the Top of Oligocene-Age Sediments................................... 14 FIGURE 10. Structure-Contour Map of the Top of Lower Miocene-Age Sediments....................... 15 FIGURE 11. Isopach Map of the Lower Miocene-Age Sediments..................................................... 17 FIGURE 12 Structure-Contour Map of the Top of Middle Miocene-Age Sediments...................... 18 FIGURE 13. Isopach Map of the Middle Miocene-Age Sediments.................................................... 19 FIGURE 14. Structure-Contour Map of the Top of the Upper Miocene-Age Sediments................. 20 FIGURE 15. Isopach Map of the Upper Miocene-Age Sediments..................................................... 21 FIGURE 16. Structure-Contour Map of the Top of Pliocene-Age Sediments.................................... 23 FIGURE 17. Isopach Map of the Pliocene-Age Sediments................................................................. 24 FIGURE 18. Isopach Map of the Quaternary-Age Sediments............................................................ 25 FIGURE 19. Location of Scarp-Like Features, Georgia Continental Shelf......................................... 33 FIGURE 20. Location of Buried Channels, Georgia Continental SheH.............................................. 34 
~~~;,~J:i~~~ls~~~~~~:~~.(~~~~.~~.~~~.~~~~~.~~.. ....... ............. ................... 37 
i5r~~~BJ:i~~~ls~~~~~~:!~.(~~~.~~-~~~-~~~~~~.~~.........................................38 
FIGURE 23. Seismic Profile at Drill Site TA2/6/278................. ................... ...................................... 39 FIGURE 24. Seismic Profile at Drill Site TA2/8/390.......................................................................... 40 
iv 
 
 UST OF FIGURES(continued) 
FIGURE 25. Seismic Profile at Drill Site TA2/9I 464..........................................................................41 
~Cfu~;,68Jr\~~~fs~~5~~~::~.<~~~~.~~-~~~.~~~~~-~~. . .................................... 42 
FIGURE 27. Seismic Profile at Drill Site TA3/2/98............................................................................43 FIGURE 28. Seismic Profile at Drill Site TA3/4/182..........................................................................44 
FIGURE 29. Seismic Profile at Drill Site TA3/4/197 and TA3/4/198...............................................45 FIGURE 30. Seismic Profile Along Line Segment TA3/4/216/234................................................... 46 
FIGURE 31. Seismic Profile at Drill Site TA3/6/335..........................................................................47 FIGURE 32. Seismic Profile Along Line 4X, TA3................................................................................48 
~~~:,3sJ:i~~~ls . ~~$~~~:~~~~:!..~~~~~~.~~.~~~.~: . . . . . . . . . . . . . . . . . . . . . 49 
FIGURE 34. Seismic Profile at Drill Site TA4/1/26...................................................................... ,..... 50 FIGURE 35. Seismic Profile Along Line Segment TA4/2/107-130.................................................... 51 
v 
 
 UST OF TABLES TABLE 1. GllvfS Target Analytes and Technical Data....................................................................... 36 TABLE 2. Results of Gamma Isotope Mapping in Target Areas and Drill Sites.................. envelope TABLE 3. Gross Texture/Mineralogy of Target Areas Vibralift Samples............................ envelope 
vi 
 
 APPENDICES APPENDIX 1. Target Area 1 ... .. .......................... ...... .. ...... .. .................. .......... ................ ................. 57 APPENDIX 2. Target Area 2.. 1......................................................................................................... 77 APPENDIX 3. Target Area 3............................................................................................................ 102 APPENDIX 4. Target Area 4............................................................................................................ 124 
Vll 
 
  OFFSHORE MINERALS ASSESSMENT STUDIES ON THE GEORGIA CONTINENTAL SHELF - PHASE 2: 
Seismic Stratigraphy of the TACfS Area and Evaluation of Selected Sites for Economic Hard Minerals Potential 
ABSTRACf 
In July through September of 1989, Georgia State University, under contract to the Georgia Geologic Survey and the U.S. Department of the Interior Minerals Management Service (MMS), conducted a project on the Georgia continental shelf with a twofold objective: first, to run a series of high-resolution seismic profiles between the borings from the Department of theNavy's Tactical Aircrew Combat Training System (TACTS) offshore platforms in order to provide a regional stratigraphic framework for the phosphate-bearing Miocene deposits, and second, to conduct a series of site-specific studies in targeted areas of the Georgia continental shelf in order to determine the presence of heavy minerals, phosphorite, and sand and gravel. 
The seismic profiling and site-specific studies were conducted with the technical assistance of the Marine Minerals Technology Center (MMTC) of the University of Mississippi and the Center for Applied Isotope Studies (CAIS) of the University of Georgia. Site-specific studies involved simultaneously towing a CAIS gamma isotope mapping system for the detection of naturally occurring radioactive minerals on or near the seafloor and a high resolution seismic system across four separate target areas. These sites were selected in areas exhibiting sandwaves and/or scarps and buried channels, which have been suggested to be favorable features for heavy mineral and phosphorite accumulation. From the resulting data, fifteen sites were chosen for a drilling program using an MMTC-constructed vibralift drill, capable of interval sampling to a depth of twenty feet. 
Although laboratory analyses of the fifty-eight drill samples are not yet completed, shipboard observations indicated favorable amounts of phosphorite in some samples from the area. Only four samples were analyzed for heavy minerals, none of which contained economic percentages. Therefore, predictions as to the economic potential of the sites and features studied cannot be made until all of the samples have been analyzed for both phosphorite and heavy mineral content. 
1 
 
 PART I. SEISl\fiC STRATIGRAPHY OF THE TACTS AREA, GEORGIA CONTINENTAL SHELF 
INTRODUCTION 
The data on which this study is based were obtained as part of a cooperative study of the Tactical Air Command Test Site (TACTS) borings (Mannheim, 1991) by the U.S. Geological Survey, the Georgia Geologic Survey, Georgia State University and the U.S. Minerals Management Service. The study was conducted during the period August 13-18, 1989 under Contract 701-090065 with the Georgia Department of Natural Resources' Geologic Survey. 
LOCATION 
The TACTS area, shown in Figure 1, is located in the mid- to outer continental shelf of Georgia. Seismic lines were run so as to connect the eight TACTS borings with the Savannah Light Tower (SLT) test hole, the Atlantic Margin Coring Project (AMCOR) hole 6002 and to provide increased data along geologic strike. 
OBJECTIVES 
Although the primary objective of this study was to tie-in the TACTS, SLT and AMCOR 6002 borings with high resolution seismic reflection profiles, the overall goal was to re-define the regional stratigraphic framework using the new information provided by the biostratigraphic analysis of TACTS boring sites provided by the Georgia Geologic Survey and the U.S. Geological Survey (Mannheim, 1991). In addition, the study was aimed at further establishing the regional stratigraphy of the phosphate-bearing Miocene-age deposits (Henry and Kellam, 1988). The combined data is presented in a series of seismic profiles and structural contour and isopach maps in the following sections. 
DATAACQUISIDON Seismic Data 
The high-resolution seismic reflection data were acquired using an O.R.E. GEOPULSE subbottom profiling system consisting of an O.R.E. model 5813 A Geopulse power supply, 
2 
 
 Sourn CAROUNA 
 
e Welllocalion --j!- Trackline 
~ Hourmark 
-riO M- Depih in meters (MSL) 
 
0 
 
10 
 
NAuncAL M!Lrs 
 
Figure 1. Location of study area TACTS boring (A-H). Other borings used in the study, target areas (Al-AS), seismic tracklines and bathymetry. 
 
3 
 
 O.R.E. model 5210A receiver and an EPC model 1650 graphic recorder onboard the ship and a towed model5812A source transducer and hydrophone streamer. The data were recorded on stereo videocassette tapes. Navigation was provided by Northstar Loran C fitted with a track plotter. The research vessel used for data acquisition was the R/V Kit Jones of the University of Mississippi Mineral Resources Institute. 
Borehole Data 
In comparison with the dense network of high-resolution seismic reflection data that covers the Georgia continental shelf (see Henry and Kellam, 1988), only few, and far apart, borehole data points were available before 1984. Thus, lacking the necessary stratigraphic framework needed for correlation, previous seismic stratigraphic interpretations relied primarily on the regional traceability of key reflectors within the seismic sequences. 
In 1984 eight foundation boreholes were drilled for the U.S. Navy Tactical Air Command by the McClelland Company of Houston, Texas (Mannheim, 1991). The borings were 
. located along three shore-parallel lines located 30 nm, 45 nm and 60 nm seaward of the coast- 
line (see Figure 1). A biolithostratigraphic analysis of the eight TACTS cores material has been completed by Paul F. Huddlestun of the Georgia Geologic Survey (Mannheim, 1991). Huddlestun (1988) also revised the Neogene stratigraphy along the lower Savannah River out to SLT and AMCOR 6002. Our seismic lines tie directly with the TACTS boreholes, SLT and AMCOR 6002. Thus, our seismic analysis is based on a much better biostratigraphic and lithostratigraphic framework than for previous studies by Henry and Kellam (1988). 
DATA REDUCTION AND STRATIGRAPlllC ANALYSIS 
Initially, the seismic records were analyzed for identification of depositional sequences i.e. time-stratigraphic units bound at the top and bottom by unconformities, whether erosional or depositional. Key reflectors, assumed to represent formational contacts, were then traced along the grid of seismic reflection lines and correlated with contacts identified in the SLT, TACTS, AMCOR 6002 borings. 
Following interpretation of the seismic reflection profiles, line drawings of the identified units and their prominent reflectors were then constructed using common vertical and horizontal scales. Structure contour maps of the tops of the major units identified as well as isopachous maps were then constructed using depths obtained from the original records. Data points for structure-contour and isopach maps outside the TACTS area have been compiled from Foley (1981), Kellam (1982), Idris (1983), Henry and Rueth (1986) and Henry and Kellam 
4 
 
 (1988). Velocity used in computation of depths to reflecting horizons was obtained from an acoustic velocity log recently run by the U.S. Geological Survey for borehole GAT 90 on Tybee Island (Huddlestun and Farrell, 1991, personal communication). An average velocity of 1650 m/second was obtained for the sections penetrated in this study. The depths thus obtained correlate well with the stratigraphic contacts in the boreholes drilled in the area. 
SEISMIC STRATIGRAPHY OF THE TACTS AREA General Statement 
Our seismic stratigraphic data in the TACTS area of the Georgia continental shelf have delineated seven seismic sequences bounded by unconformities. These sequences range in age from Eocene through Quaternary. However, in the southern portions of the study area, the Eocene and, in some cases, the Oligocene deposits were not traceable due to the penetration limits of the seismic equipment used. 
Regional stratigraphic correlation of the key reflectors bounding seismic sequences was based on information obtained from the TACTS boreholes A through H (Mannheim, 1991; Paul Huddlestun, 1990, and 1991, personal communication), SLT (McCollum and Herrick, 1964; Huddlestun, 1988), and AMCOR 6002 (Hathaway and others, 1979; Huddlestun, 1988) which served as tie points for our seismic lines. Outside the TACTS area, the data as compiled from Henry and Kellam, 1988) was correlated with the biostratigraphy of the Chatham County 
. 
borehole (Furlow, 1969; Huddlestun, 1973, 1982, 1986); GAT 90 and GAS 90 (Huddlestun and Farrell, 1991, personal communication); COST GE-1 (Schlee, 1979); GGS 3426 (Martinez, 1981; Huddlestun, 1988) and JOIDES 1 (J-1) (Bunce and others, 1979; Schlee and Gerard, 1979). The locations of all foregoing boreholes and test wells are shown on Figure 1. Line drawings of the various seismic profiles run between the TACTS boreholes are shown in Figures 2-7. 
The depths to the stratigraphic horizons identified on the basis of the seismic data gave a good correlation with those picked on the basis of biostratigraphy and lithostratigraphy. The panel diagram presented in Figure 8 summarizes the stratigraphic relationship and lateral extent of the various units identified within the TACTS area. 
Eocene 
The top of the Eocene deposits is seen as a weak to moderately strong reflector on lines 1, 2, 3 (Figures 2 and 3) and the northwestern part of line 13 (Figure 7) where upwarping has brought the contact to within the penetration limits of the Geopulse system. The Eocene deep- 
5 
 
 WSB 
 
Profile Scale 
 
MS 5 10 15 20 25 30km 
 
M 
 
20 20 
 
5 
 
10 
 
15 nm 
 
40 
 
40 60 
 
60 80 
 
80 100 120 
 
100 120 
140 160 
 
Vertical Exaggeration = 165 : 1 
M- Depth in meters; assuming v = 1500 misec 
MS- Milliseconds ; two-way travel time 
 
140 
 
07:00 
 
06:00 SLT 
 
Explanation 
 
Quaternary 
 
[Q] 
 
Pliocene 
 
[fJ 
 
upper Miocene 
 
~ 
 
middle Miocene lower Miocene Oligocene Eocene 
 
lmMI 
[0 @] []] 
 
05:00 
 
------ E 
 
E 
 
LINE 1 
s~L_T______________1_4~:o_o_______________1_5~:_o_o ____________~1~6~:o~o~------------~1~7~:o~o~----~A 
 
LINE 2 
 
Figure 2. Legend and seismic profiles along TACI'S lines 1 and 2. 
6 
 
  
 
- --1M ...,.,..--- 
~~ ' -:- 
 
Ll3 
 
12:00 
 
23:00 
 
oo:oo 
 
01:00 
 
02:00 
 
o3:ooE 
 
""l 
 
0~0 
 
lINE 4 
 
----------- 
 
Figure 3. Seismic profiles along TACIS lines 3 and 4. 
 
 I 
 
CM:OO 
 
0 1 :0 0 
 
oe :oo 
 
oe:s1 
 
oe:oo 
 
Oii:OOH 
 
----- - - - - _____., 
 
- --......._- 
~ 
mM 
 
IM 
 
LINE I 
 
G 
 
14:00 
 
13:00 
 
11:00 
 
11:00 
 
10:00 
 
H 
 
---- 
LINE e 
 
IM 
 
IM 
 
---- 
 
IM 
 
0 
 
Figure 4. Seismic profiles along TACIS lines 5 and 6. 
 
8 
 
 D tt :OO 
 
11:00 
 
11:00 
 
11:00 
 
11 :0 0 
 
0 
 
---IM 
 
0 
 
0 
 
LINI! 7 
 
z:aoo 
 
21 :00 
 
zo:oo D 
 
LINE 8 
 
Figure 5. Seismic profiles along TACI'S lines 7 and 8. 
 
9 
 
 A 12:00 
 
11:00 
 
10:00 
 
oe:oo 
 
c 
 
~p ~ 
~ 
IM - ----- 
0 
LINE 9 
 
IM 
0 -----......... 
 
...... 
0 
 
c 8:00 
 
07:00 
 
06:00 
 
05:00 
 
00':00 
 
03:00 
 
02:00 
 
F 
 
t-mM ..._ 
- Cl 
~~ -----: --~ ~~ 
- 
LINE 10 
 
-- 
 
-------- 
 
- ------==== - - ...:=::::== 
........::.............- . - - 
 
mM 
= - = -3 - - 
IM 
 
Figure 6. Seismic profiles along TACI'S lines 9 and 10. 
 
 0 
 
22:00 
 
n:oo 
 
.002 
 
, 
Ot:OO 
 
.............. SLT 
 
- --------- --- -::: ~ I 
 
._ 
 
IM ----------------------------~------------- IM 
 
~ 
 
LINE12 
 
LINE11 
 
15:00 
 
1&:00 
 
17:00 
 
18:00 
 
1S.:OO 
 
20:00 
 
D 
 
LINE 13 
 
Figure 7. Seismic profiles along TACI'S lines 11, 12 and 13. 
 
 20M 
 
40 
 
60 
 
80 
 
100 
 
120 
 
140 
 
Vertical Exaggeration 165 : 1 
 
160 
 
180 
 
FWRIDA 
 
81 Figure 8. Panel diagram showing seismic stratigraphy of the TACTS area. 
 
Explanation 
Q Quaternary PI Pliocene 
upper Miocene 
IT@ middle Miocene 
lower Miocene 0 Oligocene E Eocene 
80 
 
12 
 
 ens from 50 meters at SLT to 60 meters at Wassaw Sea Buoy and 101 meters at TACTS borehole A (See Figure 8). The Eocene unit is seismically transparent and reveals only few discontinuous reflectors. An unconformable upper surface separates the unit from the overlying Oligocene sequence. 
Oligocene 
The Oligocene unit is present as a southward- and seaward-dipping wedge unconformably overlying the Eocene unit. In the northwestern portion of the study area, where the entire Oligocene unit is resolved on the seismic profiles (see profiles 1, 2 and 3), the unit attains thicknesses of 10 to 30 meters. Elsewhere, the lower boundary of the Oligocene unit dips below resolution limits. 
The Oligocene seismic package is characterized by sparse, weak, discontinuous and subparallel reflectors. The structure contour map of the upper surface of the Oligocene unit is shown in Figure 9. This surface reveals a topographic high north of SLT bifurcating into a westward branch parallel to the coast to offshore Sapelo Island and a trending branch going southeastward then east toward TACTS borehole A and finally southward toward the area midway between TACTS boreholes D and E where it ends. The topographic lows shown on the structural contour map as hatchured contours are probably solution related. 
In the northern part of the study area, where the entire boundary of the Oligocene sequence is resolved, thicknesses range from 16 meters at SLT to 20 meters at TACTS borehole A. Elsewhere, only the upper surface is seen. 
 
Lower Miocene 
 
Miocene 
 
The lower Miocene unit unconformably overlies the Oligocene unit on all profiles except lines 11, 12, and the southern parts of lines 10 and 13 where the upper boundary of the Oligocene surface was not detected. The reflectors of the lower Miocene seismic package are parallel and closely spaced and of weak to moderate strength (see lines 7, 8, and 13 in Figures 5 and 7). The structure contour map of the lower Miocene surface (Figure 10) reveals a topographic high clearly visible between TACTS boreholes G and H. This feature continues northward toward borehole C then northwestward toward SLT and eventually meets the coast at Hilton Head Island. Landward of this high, a broad low area is seen between borehole G and the coast. This low continues northward to offshore St. Catherines Island. 
The thickness of lower Miocene deposits delineated on the seismic profiles ranges from 
 
13 
 
 F.igure 9 Structure-con tour map of the top 0 f Oligocene-age sediments. 
14 
 
 SoUTH CAROliNA 
 
Datum: MSL 
C.l. 5M 
e Well Locations 
 
0 
 
10 
 
Figure 10. Structure-contour map of the top of Lower Miocene-age sediments. 
 
15 
 
 less than 10 meters at SLT to a maximum of 60 meters between TACTS boreholes G and H (see Figure 11). The isopach map also reveals thickening toward the'coast, reaching a maximum of about 60 meters just north of Sapelo Island. Lower Miocene deposits are locally absent in borehole C and the immediate vicinity to the north, apparently due to erosion at the beginning of middle Miocene. The erosional contact between the lower and middle Miocene is marked by a prominent reflector readily traceable throughout the study area. 
Middle Miocene 
On the seismic records the middle Miocene unit exhibits strong, closely spaced, parallel, and thinly-banded reflectors that are easily distinguished throughout the study area (see Henry and Kellam, 1988, Figure 8, page 21). The upper surface of the middle Miocene is seen as a prominent, erosional, and irregular reflector that is notably channeled between TACTS boreholes C and F (see Figure 6). 
The structural contour map of the top of the middle Miocene (Figure 12) clearly depicts three topographic features: the Inner Shelf Low lying between the Outer Shelf High and the coastal Sea Island Escarpment. The Sea Island Escarpment is revealed by the closely spaced contours under the coastal barrier islands, while the Outer Shelf High is a topographic high (ridge) that is aligned north-south between TACTS boreholes G and H and through AMCOR 6002 (see profile 6, Figure 4). The broad trough between the preceding features is the Inner Shelf Low. 
The isopach map of the middle Miocene deposits is shown in Figure 13. Within the TACTS area, the greatest thickness of middle Miocene sediments occurs between an area limited by boreholes B, C, D, G, H, and E where thicknesses range from 30 to 50 meters. The area between borehole A and SLT reveals the least thickness of middle Miocene sediments absent as 10 meters or less. Middle Miocene sediments were seen in two localized areas just north of SLT and to the southwest around Wassaw Sea Buoy (WSB). 
Upper Miocene 
The top of the upper Miocene unit ranges in depth from 40 meters at borehole D to 70 meters just north of borehole G (Figure 14). The boundary between the upper Miocene and the overlying Pliocene unit is an erosional unconformity (see profile 10, Figure 6). 
Only discontinuous lenses of upper Miocene deposits were seen within the TACTS area west of a line limited by boreholes B, F, and G (see Figure 15). The thickness of the unit within 
16 
 
 Sourn CAROUNA 
 
Datum: MSL 
 
C.I.5M 
 
e Well Locations 
 
J.1 
81 
 
GE-l 
8003()11 
 
0 
 
10 
 
Figure 11. Isopach map of the Lower Miocene-age sediments. 
 
17 
 
 SOUTH CAROUNA 
 
I I .I 
 
.I .I 
.I 
 
.I 
 
.I 
 
.I 
 
Datum: MSL 
C. I. 5M 
e Well Locations 
 
0 
 
10 
 
80 NAUTICAL Mn.!:<i 3030" 
 
Figure 12. Structure-mntour map of the top of Middle Miocene-age sediments. 
 
18 
 
 32" 
 
MD.o 
~~ 
 
4rrr 
 
--- -35 
 
I I 
 
' 
 
I 
 
I 
 
I 
 
/ 
 
c 
 
_/ / 
 
_.E 
 
~----~ 
 
30, 
I I I I 
I 
 
C.I.SM  Well Locations 
 
F.igure 13 Isopach map ofthe M1'ddle Miocene-age sediments. 
19 
 
 Sourn CAROUNA 
SLT 
 
 A  B 
 
 H 
GE-l 
 
Datum: MSL 
C.!. 5M 
e Well Locations 
 
0 
 
10 
 
NAUTICAL MILES 
 
Figure 14. Structure-contour map of the top of the Upper Miocene-age sediments. 
 
20 
 
 Som'H CARoliNA 
~ 
 
GEORGIA 
 
CHATIIJIM GAT 90 
 
~~ GA}9Co0ur~-;~rd~H 
 
SLT 
 
 A  B 
 
Dalum: MSL 
C.L 5M 
e Well Locations 
 
0 
 
10 
 
NAUncAL MILES 
 
Figure 15. Isopach map of the Upper Miocene-age sediments. 
 
21 
 
 this region reaches a maximum of 10 meters. 
Pliocene 
The Pliocene seismic package exhibits seaward-prograding foresets that unconformably overly the Miocene unit and underly the surficial Quaternary unit. The lower surface of the Pliocene unit is strikingly channelized between T.~CTS boreholes F and C (Figure 6), while the upper surface shows numerous cut-and-fill structures between SLT and AMCOR 6002 (see profiles 12 and 13, Figure 7). A structure-contour map of the top surface of the Pliocene deposits is shown in Figure 16. 
The Pliocene surface deepens from 20 meters near the coast to 77 meters at TACTS borehole H. The contour lines denote a steeper gradient on the eastern flank of the Outer Shelf High. Pliocene deposits are thickest in the Inner Shelf Low where they reach a maximum thickness of 70 meters (Figure 17). They thin both to the west at the edge of the Sea Island Escarpment and to the east across the top of the Outer Shelf High. Pinch-outs are evident northward toward TACTS borehole Band SLT (see profiles 4 and 13, Figures 3 and 7). 
Quaternary The seismic profiles reveal a thin layer of Quaternary deposits (less than 10 meters) on most of the inner continental shelf except seaward of the Outer Shelf High between TACTS boreholes Band H where thicknesses range from 20 to over 30 rheters (see Figure 18 and profiles 4 and 5, Figures 3 and 4). On the seismic profiles, the Quaternary unit exhibits weak to moderately strong discontinuous horizontal reflectors. The prominent lower surface reveals numerous cut-and-fill structures incised into the underlying Pliocene deposits (see profiles 1, 2, 7, and 13 in Figures 2, 5 and 7). 
REGIONAL GEOLOGIC FRAMEWORK Structural and Topographic Features 
The Coastal Plain between North Carolina and northeast Florida is underlain by three major structural elements: the Cape Fear Arch, the Southeast Georgia Embayment and the Peninsular Arch. These features were originally thought to be caused by deformation of the Basement Complex (Maher, 1971). However, more recent works by Klitgord and others (1984), Dillon and Popenoe (1988) and Popenoe (1988) have shown that the two arches represent the Carolina Platform in the north and the Florida Platform in the south separated by the Southeast Georgia Embayment, which is underlain by Triassic basins. According to Popenoe (1988), 
22 
 
 SouTH CAROUNA 
 
Datum : MSL 
C.l. SM 
e Well Locations 
 
0 
 
10 
 
Figure 16. Structur~ontour map of the top of Pliocene-age sediments. 
 
23 
 
 Datum : MSL C.l. 5M 
Figure 17 Isopach map of the Pliocene-age sed"tments. 
24 
 
 10 
 
J.1 
81 
 
GE-l 
8003()11 
 
Figure 18. Isopach map of the quaternary-age sediments. 
 
Datum: MSL 
C.l. 5M 
e Well Locations 
 
0 
 
10 
 
NAUTICAL MILt~ 
30"30" 
 
25 
 
 the Cape Fear Arch represents a corner of the Carolina Platform caused by an offset in continental crust across the Blake Spur Fracture Zone. 
The Georgia coastline and inner continental shelf are characterized by four relatively small-scale buried topographic features: the Beaufort High/Outer Shelf High, Sea Island Escarpment and the Inner Shelf Low (Henry and Kellam, 1988). The Beaufort High has been mapped from both well data (Huddlestun, 1988) and seismic reflection data (Woolsey, 1977, 1981) Beaufort County, South Carolina, and eastern Chatham County, Georgia. 
The Outer Shelf High has been identified by Foley (1981) in the mid-shelf region, from offshore St. Simons Island to offshore Cumberland Island on the basis of seismic reflection profiles. Both the Beaufort High and the Outer Shelf High are low-relief topographic features that essentially affect the Miocene strata. 
Because the overlying Pliocene and Quaternary strata as well as the underlying Oligocene deposits are flat-lying, both features are considered to be the result of differential erosion. It is apparent that these features are analogous and that the Outer Shelf High is simply the southerly extension of the Beaufort High. 
The Sea Island Escarpment is a Miocene feature originally described by Woolsey and Henry (1974) on the basis of high-resolution seismic reflection records which reveal the feature to extend from southern coastal Chatham County southward under the present barrier Islands. The escarpment, named by Huddlestun (1988), curves seaward at Cumberland Island and continues under the inner shelf as far south as Cape Canaveral (see Henry and Kellam, 1988). According to Woolsey (1977) and Foley (1981), the escarpment was incised by waves and/or currents between middle Miocene and Pliocene time and was overlain by large-scale clinoforms of late Pliocene age. Present data suggest that the escarpment was the inner, erosional edge of the Miocene embayment later filled with Pliocene deposits. 
The Inner Shelf Low was described by Foley (1981) for a trough-like feature open to the south that is bounded by the Sea Island Escarpment on the landward side and by the Beaufort High and the Outer Shelf High on the seaward side. The Low is filled with Pliocene deposits that pinch out to the north and west and thicken to the south. 
 
Eocene 
 
Stratigraphy 
 
In the Coastal Plain of Georgia Eocene deposits are known from a series of deep water wells and test holes (McCollum and Herrick, 1964; Maher, 1971; Gohn and others, 1978). On the continental shelf, they have been penetrated in the SLT well (McCollum and Herrick, 1964; 
26 
 
 Huddlestun, 1988), AMCOR 6002 well (Hathaway and others, 1979; Huddlestun, 1988) and COST GE-1 well (Poag and Hall, 1979). The Eocene sediments constitute the thickest of the Cenozoic section in the southeastern U.S. Thicknesses range from 130 meters near Charleston, South Carolina to 400 meters in Coastal Georgia (Gohn and others, 1979). The deposits are much thicker offshore, reaching about 500 meters at the COST GE-l well off southern Georgia (Scholle, 1979). 
Eocene strata are primarily fossiliferous limestones and dolomites with small amounts of sands, silts and clays (Maher, 1971; Gohn and others, 1979). In this study, Eocene deposits are delineated only in the extreme north portion of shelf and belong to the upper Eocene Ocala Group consisting of gray to buff, slightly glauconitic, fossiliferous sandy limestone (Herrick and Vorhis, 1963; McCollum and Herrick, 1964). In South Carolina, both the Cross Formation and the lower part of the Cooper Formation constitute the laterally equivalent units (Hazel and others, 1977). In Georgia and South Carolina, the upper Eocene limestones are considered as the primary unit of the Floridan Aquifer. 
Oligocene 
In the Coastal Plain of Georgia, Oligocene deposits are present as an undifferentiated unit unconformably overlying the Ocala Limestone. The unit consists of light gray fossiliferous limestones updip grading into sandy limestones downdip near the coast (Herrick and Vorhis, 1963; McCollum and Herrick, 1964). On the continental shelf, the strata grade from sandy limestone/ calcareous sand of the Lazaretto Creek Formation at the SLT test boring (Huddlestun, 1988) to argillaceous calcareous ooze at AMCOR 6002, JOIDES 1 and COST GE-1 test holes (Bunce and others, 1979; Scholle, 1979; Huddlestun, 1988). 
Both onshore and offshore Georgia and South Carolina, the Oligocene strata are less than 100 meters thick and in some places they are completely removed by erosion (Herrick and Vorhis, 1963; Paull and Dillon, 1980; and Huddlestun, 1988). Paleoenvironmental studies show that the Oligocene deposits were deposited in outer shelf or deeper waters (Hathaway and others, 1979). 
Miocene 
In coastal Georgia and South Carolina, Miocene deposits are represented by the Hawthorne Group composed of the lower Miocene Parachucla Formation and Marks Head Formation and the middle Miocene Coosawhatchie Formation. Upper Miocene deposits are absent in the coastal areas but occur as thin discontinuous lenses in the inner Georgia shelf 
27 
 
 (Woolsey, 1977; Foley, 1981). 
Lower Miocene: The lower Miocene includes the Parachucla Formation overlain disconformably and paraconformably by the Marks Head Formation. According to Huddlestun (1988), the Parachucla Formation is composed of phosphatic, calcareous, argillaceous sand locally dominated by limestone and dolostone. 
The Marks Head Formation is composed of slightly dolomitic, phosphatic, sandy clays and argillaceous sands. The formation has an upper boundary of dolomitic clay that is disconformably overlain by the Coosawhatchie Formation of middle Miocene age. Both the Parachucla and Marks Head formations are less phosphatic than the overlying Coosawhatchie Formation (Henry and Kellam, 1986; Mannheim, 1991). 
On seismic reflection profiles, the lower Miocene units reveal closely-spaced, parallel reflectors of weak to moderate strength. Prograding foresets of possible deltaic origin are often seen within the Marks Head Formation (Woolsey, 1977). 
The depositional environment during the lower Miocene was that of a shallow shelf and restricted marine deltaic deposits (Woolsey, 1977; Hathaway and others, 1979). During early middle Miocene a drop in sea level resulted in subaerial erosion of the lower Miocene deposits (Vail and others, 1977). This erosional surface is evide11ced by a fairly prominent reflector on top of the lower Miocene deposits. 
Middle Miocene: On the Coastal Plain and continental shelf of Georgia and southeastern South Carolina, the middle Miocene deposits are assigned by Huddlestun (1982, 1988) to the Coosawhatchie Formation (formerly Coosawhatchie Clay Member) of the Hawthorne Group (formerly Hawthorne Formation). The Coosawhatchie Formation consists of phosphatic clay, sandy day, argillaceous sand and phosphorite. The formation has been divided by Huddlestun (1988) into four members: the basal Tybee Phosphorite Member, the Berryville Member, the Ebenezer Member, and the Charlton Member. Three of these, namely, the Tybee Phosphorite Member, the Berryville Member, and the Ebenezer Member are represented in the coastal and continental shelf deposits. 
The basal Tybee Phosphorite Member consists of quartz sand and phosphorite with small amounts of clay and dolomite (Huddlestun, 1988). The phosphorite occurs as small, well-rounded, black, brown or amber grains or pellets of apatite that range in size from 0.1 mm to 1 mm (Woolsey, 1977; Wallace, 1980; Huddlestun, 1988). It is typically associated with fish bones and teeth. According to Wallace (1980), phosphorite concentrations within the 
28 
 
 Tybee Phosphorite Member range from 12% to 40% BPL (Bone Phosphate of Lime). The Tybee Phosphorite Member has not been identified in the TACTS holes (Popenoe and others, 1989), but was identified in JOIDES 1, COST GE-l and AMCOR 6002 off Georgia (Poag and Hall, 1979). 
The Berryville Clay Member conformably overlies the Tybee Phosphorite Member. It is described as an olive-gray, phosphatic, variably calcareous, microfossiliferous, silty clay (Huddlestun, 1988). On the continental shelf of Georgia, the Berryville Clay Member is the most phosphatic unit (Mannheim, 1988) and makes up the entire Coosawhatchie Formation (Huddlestun, 1988). The unit is present in TACTS boreholes B, C, D, E, F, G, H, and AMCOR 6002 (Mannheim, 1991; Huddlestun, 1990, personal communication). Berryville equivalent middle Miocene phosphatic sediments have also been identified in COST GE-l well between depths of 105 and 218 meters (Scholle, 1979). The Berryville Clay Member grades westward into the more clastic and non-phosphatiC Ebenezer Member (Huddlestun, 1988). 
The Ebenezer Member constitutes the upper part of the Coosawhatchie Formation and is formed of a gray to olive-gray, slightly phosphatic, argillaceous, fine- to medium-sand (Huddlestun, 1988). In areas where the lower Miocene is absent, the Coosawhatchie Formation constitutes the upper confining layer for the underlying Oligocene and Eocene beds of the Floridan Aquifer. 
Upper Miocene: Upper Miocene deposits occur only in few discontinuous lenses in the inner shelf of Georgia (Woolsey, 1977; Foley, 1981; Kellam and Henry, 1988). AMCOR 6002 penetrated 10 meters of olive silty clay and phosphatic sands of late Miocene age (Hathaway and others, 1979). However, no upper Miocene sediments occur onshore in Georgia, apparently a result of subaerial erosion in the latest Miocene low sea level stand (Huddlestun, 1982; Popenoe and others, 1989). 
Pliocene 
Pliocene deposits on the Georgia coast and continental shelf are represented by the early Pliocene Wabasso Beds of the Hawthorne Group, and the early late Pliocene Duplin Formation. An undifferentiated unit of upper Pliocene sand is also found in the outer continental shelf. 
The Wabasso Beds consist of silty, fine- to very fine-grained sand that is variably phosphatic, calcareous, microfossiliferous and argillaceous (Huddlestun, 1988). Seismic profiles indicate that these beds occupy a relatively narrow belt on the seaward side of the Sea Island 
29 
 
 Escarpment. On the continental shelf, Wabasso Beds have been cored at TACT'S borings A, C, D, H & G. Thicknesses range from 13 meters at boring A to 53 meter at boring G (Huddlestun, 1990, personal communication). 
The Duplin Formation consists of well-sorted, massive beds of slightly argillaceous, variably shelly, calcareous and fossiliferous sand that is locally pebbly and gravelly (Huddlestun, 1988). Seismic profiles in the coastal area reveal large-scale eastward-dipping clinoforms within the Duplin Formation (Woolsey and Henry, 1974; Woolsey, 1977; Foley, 1981). On the Georgia coast and continental shelf, the Duplin Formation thins and pinches out in landward and seaward directions as well as to the north of the Beaufort High. The deposits are thickest on the inner shelf low immediately offshore of the islands (Henry and Kellam, 1988; Huddlestun, 1988). Thicknesses on the shelf reach approximately 4 meters at AMCOR 6002 TACT'S borehole F (Huddlestun, 1990, personal communication). 
The undifferentiated upper Pliocene unit of the outer continental shelf consists of loose brecciated shell hash and loose, fine to very coarse quartz sand that contains phosphate pellets, calcareous mud, glauconite and sedimentary rock fragments (Huddlestun, 1988). The unit has been cored at TACTS boreholes C, E, F and H (Huddlestun, 1990, personal communication), COST GE-1 test well And JOIDES J1 and J2 (Poag, and Hall, 1979). Thicknesses range from 4 meters at TACT'S borehole C to 34 meters at COST GE-1. 
Quaternary 
Quaternary sediments across the continental shelf of Georgia and South Carolina constitute a thin blanket of unconsolidated sands that were deposited during seaward transgressions and regressions associated with fluctuations of sea level (Pilkey and others, 1981). The shelf sands become richer in calcareous material both seaward and to the south (Milliman and others, 1972). In seismic profiles, the unit exhibits weak parallel to subparallel reflectors and numerous cut-and-fill structures incised into the underlying Pliocene deposits (Woolsey, 1977; Henry and others, 1978; Foley, 1981; Kellam, 1981; Idris, 1983). 
CONCLUSIONS 
1. Seismic reflection profiles within the TACTS area delineate seven depositional sequences bounded by unconformities and ranging in age from Eocene through Quaternary. 
30 
 
 However, in the southern portions of the study area, Eocene and, in some parts, Oligocene sequences were not traceable due to the penetration limit of the seismic equipment used. 
2. Between boreholes C and F, the Pliocene section reveals extensive channelling into the underlying upper and middle Miocene. The channels may contain phospohorite-rich lag deposits formed by reworking of the underlying middle Miocene deposits, and as such are primary targets for phosphorite exploration. 
3. The middle Miocene section along the coast is cut by the Sea Island Escarpment, a major topographic feature that controlled the deposition of the overlying Pliocene deposits. 
4. The Outer Shelf High comes to within 10 meters of the seafloor between boreholes G and H and extends northeastward to the vicinity of SLT. The crest of this feature is a primary target for phosphorite exploration. 
5. The middle Miocene comes to within 4 meters of the seafloor midway between boreholes A and C, thus making this location another primary target for phosphorite exploration. 
6. The Outer Shelf Low is a topographic trough located between the Outer Shelf High and the coastal Sea Island Escarpment and is filled with Pliocene sediments, the lower portion of which may be enriched with phosphorite from the underlying lower Miocene deposits. 
31 
 
 PART II. EVALUATION OF SELECI'ED SITES FOR ECONOMIC HARD MINERALS POTENTIAL 
INTRODUCTION Based on the scientific literature and industry experience, the Georgia Department of Natural Resources and U.S. Minerals Management Service Joint Task on Offshore Minerals Assessment recommended a study of certain features on the continental shelf whose origin involved processes that tended to concentrate economic mineral species. Features such as buried channels that may have cut into ore-bearing deposits, thus creating lag concentrates, and erosional scarps (old shorelines?) that may have heavy mineral deposits concentrated by winnowing were prime targets. The selection of four target areas conforming to the above criteria were based on previous studies (Henry and Hoyt, 1968; Foley, 1981; Henry, 1983; Henry and Rueth, 1986; and Henry and Kellam, 1988) and high resolution seismic data collected during the course of the present study. (see Figures 19 and 20). The locations of the target areas (TA1-5) are shown in Figure 1. 
DATA ACQUISIDON 
The site-specific studies were carried out with the technical assistance of the Marine Minerals Technology Center (MMTC) of the University of Mississippi and the Center for Applied Isotope Studies (CAIS) of the University of Georgia. The work involved simultaneously towing a gamma isotope mapping system (GIMS) to detect naturally occurring radioactive minerals on or near the seafloor and a high resolution seismic profiling system to define scarps and buried channels and, as it turned out, sandwaves. From the resulting data, a total of fifteen sites were chosen for exploratory drilling. 
The Gamma Isotope Mapping System (GIMS) 
Developed by the Center for Applied Isotope Studies at the University of Georgia, the GIMS is a rapid, continuous sediment-analysis system that utilizes a gamma spectroscope within a bottom towed sled to determine certain elemental constituents of seafloor sediments that are directly relevant to this study, namely, Bismuth 214, Thallium 208 and Potassium 40. Bi214 indicates uranium activity associated with phosphate, Tl208 is indicative of thorium 
32 
 
 0 tO IOIQI -1011- IIOBATH 
---1 SCARP 
GA 
 
....-O"" 
 
.... ~... 
 
,... ti 
 
4 / / 5 
 
,. 
 
I 
 
-_, 
(__ 
c.:" 
 
1~ ~  
.-: f 
 
' 
 
I 
 
I 
! 
 
' 
 
r l 
 
80 
 
Figure 19. Location of scarp-like features, Georgia Continental Shelf. 
 
33 
 
 IWMI 
5 0 5 10 15 20 KM 
TRACKLINE 
-- -- U.S.G--.S-.--s-'u-R-V-E--Y- 
GA STATE UNIV. SURVEY 
- C:.!l.!.~!t-~~!1 OLD RIVER CHANNEL CHANNEL FILL >111m CHANNEL FILL 10-11m 1111111 CHANNEL FILL ~10m 
 
' ' ' 
 
''' '' ' 
 
'' ' 
 
- -1111'- -/ 
 
32 
 
 ' 
 
' 
 
' 
 
' 
 
/ 
) /, 
 
/ 
 
/ 
 
, , 
 
,. ' / 
 
..:. 
 
./ 
-, 
 
' 
 
I 
I 
I 
---J 
 
I 
 
-- 
 
I 
\ -7-I -- 
 
L__i__ 
 
l- 
 
ot 
 
Figure 20. Location of buried channels, Georgia Continental Shelf. 
 
34 
 
 activity in economic heavy mineral deposits and K40 is contained in clay minerals, the relative abundance of which provides information on gross sediment texture. 
The GIMS records gamma activity in counts per minute (cpm) for the three elements as well as the total gamma activity. It also records the latitude, longitude and water depth at each data point and is calibrated to the respective ship's systems. There was a 60 sec. delay in data recording to allow the sled to move to the position of the vessel at the time the location was recorded. Technical information concerning the operation of the GIMS is presented in Table 1. It should be noted that maximum subbottom detection of the reference minerals is less than 0.5 meter. While this severely limits its use to survey buried channels, the system is very appropriate for detecting surficial concentrations of heavy minerals. Trackline maps of each target area are presented in Figures 21, 22,26 and 34. The points (sites) along each trackline are locations at which gamma activity is recorded. These data are collectively presented for each target area in Appendices 1-4 and Table 2. Analyses of the gamma activity measured within each target area, including hydrography, are also presented in computerderived diagrams and isopleth maps in Appendices 1-4. 
Vibralift Coring 
The location of the drillsites in each target area was determined after evaluation of the GINS and seismic surveys. As shown in Figures 21-35, vibralift cores were taken to evaluate areas exhibiting sandwaves and buried channels, and "control" areas of only flat-lying sediments. Also, efforts were made to include areas of both high and low gamma activity. 
A total of 15 vibralift cores were obtained using a drill constructed by the MMTC. This device collected fluidized samples through five-foot intervals to a depth of 20 feet. Although a total of 58 five-gallon samples were collected, detailed analyses of mineralogy and texture have not been completed as yet. Preliminary results are presented in Tables 2 and 3 together with the results of gamma isotope mapping in the target areas and drillsites. 
DISCUSSION 
Examination of the data available to this study thus far suggests that the percent of economic heavy minerals occurring in the target areas is presently below industry interest. This is supported by the results of previous industry surveys in the region by DuPont (Jack Reynolds, 1990. personal communication) and Associated Minerals (Greg Bonn, 1990, personal 
35 
 
 Table 1. GIMS target analytes and technical data. 
 
Target Analytes 
 
Bismuth Thallium Potassium Total activity 
 
Bi-214 Tl-208 K-40 
 
Technical Data 
 
Data results: Distance between stations: Calibration test: Calibration results: 
 
Operating range penetration: reference: reference channel: resolution: gain: preferred gain: ship speed: 
 
GIMS 
counts per minute (cpm) 60s monazite sand spectrum printout 
-45cm cs-137 55 - 8% 0-255 50-200 2.5 to 3 kn 
 
36 
 
 81 o 0 0 'W 31 43'N 
VJ 'l 
 
Nautical Ylle 
 
80 54 w 3 1 o 4 3 'N 
 
~DRILL SITES: TA1/1/97 
 
' ' 
30~, 
' ' 
 
TA1/5/212 TA1/6-7/288 
iN 
 
3 1 
 
DEEP CHANNEL +15M - - - - MEDIUM CHANNEL 5 - 15M --------SHALLOW CHANNEL 0 - 5M .. 
--- --- --- CREST OF SANDWAVE -._.._.._.-.,-.,_.._._.. ..._.. ...._., ..._.-.. ~.._ 
 
31 39'N 8 1 o 0 0 'W 
 
SITE 1 SHIP~ TRANSECTS GEORGIA MINERAL SURVEY 
 
3 1 o 3 9 'N 
80  54 'W 
 
Figure 21. Trackline map of target area (TAl) showing location of drill sites, buried channels and sandwaves. 
 
 . .. --  
 
8 o 0 5 5 w 
 
.,3 5 'N ... ...... ...... 
 
C;l 
00 
 
Naut. ical Mile 
~DRILL SITES: TA2/2/ll4 TA2/4/215 TA2/6/278 TA2/8/390 TA2/9/464 
 
Boo 4 9 w 
3 1 3 5 ~ 
lN 
 
DEEP CHANNEL +15M 
 
MEDIUM CHANNEL 5 - 15M --------SHALLOW CHANNEL 0 - SM  
 
CREST OF SANDWAVE 
 
31 31'N 80 55'\f 
 
SITE 2 SHIP~ TRANSECTS GEORGIA MINERAL SURVEY 
 
31 3l'N 80 49 'W 
 
Figure 22. Trackline map of target area 2 (TA2) showing location of drill sites, buried channels and sandwaves. 
 
 39 
 
 40 
 
 41 
 
 Nllu\icld Wile 
 
80 8 oO'W 
 
I 
 
i 
 
80" 46 'W 
 
~1 8 30~ r---------~--------~----------~--------~--------~ 31" 30'N 
 
~DRILL SITES: TA4/2/98 TA4/4/182 TA4/4/197 TA4/4/198 TA4/6/335 
 
--- ----- - 
SHALLOW CHANNEL 0 - 5M  CREST OF SANmiAVE -------... 
 
31" ~4'N tlO" oO'W 
 
31" ~4'N 80  4 5 'W 
 
S I T E 3 GHAY 'S HE E F S II I P 'S '1' HANS ~ C'I' S 
GEOHGIA Ml N~~HAL SUHVEY 
 
Figure 26. Trackline map of target area 3 (TA3) showing location of drill sites, buried channels and sandwaves. 
 
42 
 
 43 
 
 OtbO 
 
0N-1 
 
~:~0 
...,.,..tls 
 
~At~~~I!'Jr~ 
 
-c.,.o.. 
q-> 
 
44 
 
 ~ 
Figure 29. Seismic profile at drill site TA3/4/197 and TA3/4/198. 
 
 0*"'". 
 
200M 
,..J~-- 
 
j .. I 
 
'A 
 
-L.. 
 
Figure 30. Seismic profile along line segment TA3/4/216-234. 
 
 1/) 
 
--('W) 
('W) 
co 
('W) 
 
u) 
C<) C<) 
'- 
\0 
 
<1: 
1- 
 
> 
 
'- 
C<) 
~ 
 
.-O::J: 
<fl 
 
, E'f,l 
 
FE 
 
"..0... 
 
<U 
 
..9:1 
eG:: 
0... 
 
<:.J 
' 
 
<fl 
~ 
 
,.....; 
C<) 
 
.O..J. 
So 
~ 
 
47 
 
 48 
 
 8 oo 41 'W 
31 16'N 
 
Nautical Mile 
 
80 33'W 31 16'N 
 
-9-DRILL SITES: TA5/l/26 
 
TA5/4/254 
 
DEEP CHANNEL +15M - - - - - 
 
MEDIUM CHANNEL 5 - 15M--------- 
 
SHALLOW CHANNEL 0 - 5M - CREST OF SANDWAVE ~ 
 
iN 
 
\*."0' 
 
....J 
 
31 ll'N 8 0 o 41 'W 
 
SITE 5 SHIP'S TRANSECTS 
GEORGIA MINERALS SURVEY 
 
31 llS 80 3 3 'W 
 
Figure 33. Trackline map of target area (TA4) showing location of drill sites, buried channels and sandwaves. 
 
 50 
 
 (....J..l. Figure 35. Seismic profile along line segment TA4/2/107-130. 
 
 communication). The results of the four samples analyzed (Table 3) show no clear relationships either with the features sampled or the measured gamma activity (Table 2). It should be pointed out that all gamma counts represent only surficial sediments with regard to each target area. 
Higher gamma activities occurred in the northeast portion of TA 1, the northern portion of TA 3 and the southwestern portion of TA 4. The values in TA 2 showed no particular trend. No analyses are presently available for phosphorite content. However, shipboard observations made during the collection of vibralift samples indicated that some samples visibly contained phosphorite pellets. 
Examination of the seismic profiles shows that the deeper portions of even the smaller channels were below the sampling capability of the vibralift drilling system used in the study. Therefore, an adequate evaluation of these features could not be accomplished. Additionally, the relatively small scarp-like features shown in Figures 30,35 and 36 appear to be prograding sandwaves and unlikely to have heavy mineral concentrations associated with them. However, erosional scarps appear to be present on the shelf (Henry and Hoyt, 1968) that are associated with broad terraces. These features are separated by the seaward facing scarps which exhibit up to 7 meters relief. It appears that the sandwaves shown in this study are developed on one or more terraces. 
CONCLUSIONS AND RECOMMENDATIONS 
1. No obvious trends of occurrence of either phosphorite or heavy minerals were observed within the target areas. 
2. Preliminary examination of the samples suggests that a potential for economic phosphorite deposits exists in the target area, but not for heavy minerals. 
3. Because of the sediment penetration limitation of the vibralift coring and gamma isotope mapping systems only the surficial features of the target areas were given an adequate test. Only at two locations were even the uppermost portions of channel deposits sampled. 
4. The data thus far collected indicate that the buried channels offer the best potential for the economic occurrence of phosphorite. To adequately test this supposition, a drilling program using a system capable of obtaining sediment samples to a subbottom depth of at least 25 meters will be necessary. A jack-up rig such as is available from the Savannah District Corps of Engineers is recommended. 
52 
 
 5. Based on this study and the results of the recent industry surveys in the region, it appears that any additional heavy mineral surveys on the shelf should be located between Cumberland Island and Cape Canaveral. 
6. The foregoing conclusions and recommendations will be re-evaluated after analysis of the 58 sediment samples has been completed. 
53 
 
 REFERENCES CITED 
Bonn, Greg, 1990, Personal communication, RGC Minerals, Inc., Greencove Springs, FL. Bunce,E.T., Emery, K.O., Gerard, RD., Scott, S.T., Udz, L.,5ation, T, and Schlee, J., 1%5, Ocean drilling 
on the continental margin: Science v. 150, p. 709-716. Dillon, W.P. and Popenoe, P. 1988, The Blake Plateau Basin and Carolina Trough: In Sheridan, RE. and 
Grow, J.A. (Eds.), The Atlantic Continental Margin, U.S., Geol. Soc. Am. Bull., The Geology of North America, V. 1-2, p. 291-328. Foley, F.D., 1981, Neogene seismic stratigraphy and depositional history of the lower Georgia coast and continental shelf: Unpub. M.S. thesis, University of Georgia, Athens, 80 p. Furlow, J.W., 1%9, Stratigraphy and economic geology of the eastern Chatham County phosphate deposit: Georgia Geol.Surv. Bull. 82,40 p. Gohn, G.S., Higgins, B.B., Smith, C.C., and Owens, J.P., 1978, Preliminary stratigraphic cross-sections of the Atlantic coastal plain sediments of the eastern United States: U.S. Geol. Surv., Map MMF1015 B. Gohn, G.S., Bybell,L.M., and Smith,C.C., 1979,AstratigraphicfrarneworkforCretaceousandPaleogene margins along the South Carolina and Georgia coastal sediments: U.S. Geol. Surv. lnf. Circ. 53, p.64-74. Hathaway, J.C., Poag, C.W., Valentine, P.C., Miller, RE., Schultz, D.M., Mannheim, F.T., Kohout, F.A., Bothner, M.H., and Sangrey, D.A., 1979, U.S. Geological Survey core drilling on the Atlantic shelf: Science, 206 (4418), p. 515-527. Hazel, J.E., Bybell, L.M., Christopher, RA., Fredricksen, N.O., McLean, D.M., Poone, RF., Smith, C.C., Shol, N.F., Valentine, P.C., and Witmer, RJ., 1977, Biostratigraphy of the deep core hole (Clubhouse Crossroads Core Hole 1) near Charleston, South Carolina: In Rankin, D.W. (Ed.), Studies related to the Charleston, South Carolinaearthquake of1886: A preliminaryreport, U.S. Geol. Surv. Prof. Paper 1028F, p. 71-90. Henry, V.J. and Rueth, L.J., 1986, Interpretation of the seismic stratigraphy of the phosphate Neogene deposits of the Georgia continental shelf: Report to the Georgia Dept. Nat. Res., Geol. Surv., 52 
P 
Henry, V.J. and Kellam, J.A., 1988: Seismic investigation of the phosphate-bearing, Miocene-age strata of the continental shelf of Georgia: Georgia Geol. Surv. Bull. 109, 43 p. 
Herrick, S.M. and Vorhis, RC., 1963, Subsurface geology of the Georgia coastal plain: Georgia Geol. Surv. Info. Circ. 25,78 p. 
54 
 
 Huddlestun P.F., 1973, Lower Miocene biostratigraphy along the Savannah River, Georgia: Gulf Coast Assoc. Geol. Soc. Trans. v. 23, p. 432-433. 
Huddlestun, P.F., 1982, The stratigraphic subdivision of the Hawthorne Group in Georgia: In Scott, T.M.andUpchurch,S.B.,(Eds.),MioceneofthesoutheasternUnitedStates,stateofFloridaDept. Nat. res. Bureau Geol. Spec. Pub. 25, p. 183. 
Huddlestun, P.F., A revision of the lithostratigraphic units of the coastal plain of Georgia: the Miocene through Holocene: Georgia Geol. Surv. Bull. 104, 162 p. 
Idris, F.M., 1983, Cenozoic seismic stratigraphy and structure of the South Carolina lower costal plain and continental shelf: Unpub. Ph.D. dissertation, University of Georgia, Athens, 126 p. 
Kellam, J.A., 1981, Neogene seismic stratigraphy and depositional history of the Tybee Trough area, Georgia-South Carolina: Unpub. M.S. thesis, University of Georgia, Athens, 111 p. 
Klitgord, K.D., Popenoe, P. and Schouten, H., 1984, Florida: a Jurassic transform plate boundary: Jour. 
Geophys. Research, v. 89, p. 7753-7772. 
Maher, J.G., 1971, Geologic framework and petroleum potential of the Atlantic Coastal Plain and continental shelf: U.S. Geol. Surv. Prof. Paper, 659, 98 p. 
Mannheim, F.T., (Ed.), 1988, Phosphorite Potential in the Georgia EEZ: Results of the TACTS core 
studies: Report to Georgia Hard Minerals Task Force, Woods Hole, MA, 77 p. 
Martinez, J.O. 1981, Neogene stratigraphy and sedimentary environments of Cumberland Island, Georgia: Unpub. M.S. thesis, University of Georgia, Athens, 103 p. 
McCollum, M.J and Herrick, S.M., 1964, Offshore extension of the upper Eocene to Recent stratigraphic sequence in southeastern Georgia: U.S. Geol. Surv. Prof, Paper 501C, p. 61-63. 
Paull,C.K. and Dillon, W.P., 1980,Structure, Stratigraphy and geologic historyofFlorida/Hatteras shelf and inner Blake Plateau: AAPG Bull. 64 (3), p. 339-358. 
Pilkey, O.H., Blackwelder, B.W., Knebel, H.l., and Ayers, M.W., 1981,TheGeorgiaEmbaymentcontinental shelf, stratigraphy of a submergence: Geol. Soc. Am Bull., 92 (1), p. 52-63. 
Poag, C.W. and Hall, RE, 1979, Foraminiferal biostratigraphy, Paleoecology and sediment accumulation rates. In Scholle, P.A. (Ed.): Geological Studies of the COST GE-l well, United States Outer Continental Shelf Area: U.S. Geol. Surv. Circ. 800, p. 49-53. 
Popenoe, 1988, Paleooceanography and paleogeography of the Miocene of the Southeastern United States: In Burnett, W.C, and Riggs, S.R (Eds.), World phosphate deposits, vol. 3, Neogene phosphorites of the South-eastern United States, Cambridge University Press, N.Y. 
Popenoe, P., Huddlestun, P.F., and Henry, V.J., 1988, In Mannheim, F.T., (Ed.) 1988, Phosphorite Potential in ijle Georgia EEZ: results of the TACTS core studies: Report to Georgia Hard Minerals Task Force, Woods Hole, MA, p. 54-64. 
55 
 
 Reynolds, Jack, 1990, Personal communication, E.I. DuPont de Nemours and Co. Inc., Trail Ridge, FL. 
Schlee, J. and Gerard, R., 1965, J.O.I.D.E.S. Blake panel report and preliminary core log M/V Caldrill I, 17 April to 17May, 1965, Office of Mar. Geol., U.S. Geol. Surv., Woods Hole, MA, 64 p. 
Scholle, P.A., (Ed.), 1979, Geological studies of the COST GE-l well, United States Outer Continental Shelf area: U.S. Geol. Surv. Circ. 800, 114 p. 
Vail, P.R., Mitchum, R.M., and Thompson, 1977, Global cycles of relative changes of sea level, In Payton, C.E., (Ed.), Seismic stratigraphy-applications to hydrocarbon exploration: AAPG Memoir, 2h, p. 83-98. 
Wallace, RJ., 1980, The origin and diagenesis of the phosphate deposit in the middle Miocene Hawthorne Formation of northwest Chatham County,Georgia: Unpub. M.S. thesis, University of Kansas, 70 p. 
Woolsey, J.R, and Henry, V.J., 1974, Shallow, high resolution seismic investigation of the Georgia coast and inner continental shelf: In Stafford, L.P. (Ed.), symposium on the petroleum geology of the Georgia coastal plain, Georgia Dept. Nat. Res., Earth and Water Div., Bull. 87, p. 167-188. 
Woolsey,J.R, 1977,NeogenestratigraphyoftheGeorgiacoastandinnercontinentalshelf: Unpub. Ph.D. dissertation, University of Georgia Athens, 222 p. 
56 
 
 APPENDIX 1 GAMMA ISOTOPE MAPPING DATA 
TARGET AREA 1 
57 
 
 81 o 0 0 'W 31 43'N 
U1 
(X) 
 
Nautical Mile 
 
80 54 'W 31 43'N 
iN 
 
31 39'N 81 o 0 0 'W 
 
SITE 1 SHIP~ TRANSECTS GEORGIA MINERAL SURVEY 
 
31 39'N 80 54 'W 
 
 81 o 00 'W 31 43'N 
 
Nautical Mile 
L 
 
c(Jo1 
 
80 54'W 31 o 43'N 
iN 
 
31 39'N 81 o 0 0 'W 
 
SITE 1 WATER DEPTH CONTOUR GEORGIA MINERAL SURVEY 
 
31 39'N 80 54'W 
 
 1' ~ Cl 0~ Cl 
~ 
~ ((.) 
0 
~ ~ 
 
:>-t 
~ 
;:> 0:: ~ o::rt.l 0 0....:~ 
....:l-ex: 
~0:: 
<~ 
~z rt.l......, 
~~ 
~<........ E-<0 
~0:: 
0 
~ 
0 
 
60 
 
 81 o 0 0 'W 
31 43'N 
' 
O......l. 
 
Nautical Mile 
 
80 54'W 31 43'N 
iN 
 
31 39'N 81 OO'W 
, 
 
SITE 1 K-40 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 39'N 80 54 'W 
 
 0> 
 
8Jo 
 
N 
 
oo 'If 
 
8oo ~ 
u4. 'Jr 
siTE 1 K-40 GAMMA ACTIVITY 
GEORGIA MINERAL SURVEY 
 
 81 o 00 'W 31 43'N 
0) (..) 
 
Naulical Mile 
 
80 54 'W 31 43'N 
iN 
I 
 
31 39'N 81 o 0 0 'W 
 
SITE 1 BI-214 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 39'N 80 54 'W 
 
 0 
...... 
~ 
~ 
~ It;) 
0 
c 
Cb 
 
-:>-< 
~ 
;>!>-< -t:il 
~;> 
u~ 
<:::> 
:n 
< 
~~ ~< <~ \.!)t::z:l 
z 
~ ....... ........ ~ ::'\2 
....I.. <_., 
(:!)\..!) 
.,....~ .o 
-t~:il0 t:il 
:n 
 
64 
 
 81 OO'W 
I 31 43'N 
 
I ~//; 
 
Naut.ical Mile 
 
0) 
 
~ 
 
CJ1 
 
80 54'W 31 43'N 
iN 
 
31 39'N 81 o 00 'W 
 
- 
SITE 1 TL-208 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 39'N 80 54 'W 
 
 0 ~ 
Cl 
..~., 
((:> 
0 
C) 
q, 
 
)-4 
-E--4 
;>)-4 
-~ 
Eo-4;> 
u~ 
<::::> 
rn 
~~ 
=a< 
<~ 
z t,!)~ 
cc- 
o::S 
cy< 
~- 
e-.d 
~ 
.-10 
~~ 
-E--4d 
rn 
 
66 
 
 81 o 00 'W 31 43'N 
\ 
0) 
-...J 
 
Nautical Mile 
 
80 54'W 31 43'N 
IN 
("...- 
 
31 39'N 81 o 0 0 'W 
 
SITE 1 TOTAL GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 39'N 80 54 'W 
 
 0~ 
C> 
 
-~ 
E-< 
;>~ 
 
-r.J 
 
uE-o<:>: 
 
<::::> 
 
rn 
< 
 
~ 
~ 
<t:l 
 
~~ ~< 
<O:: 
 
0 
C) Q:) 
 
0r.zJ 
~<~ - 
 
E-< 
O< 
 
E-<- 
0 
 
~o:: 
 
~~ 
-E-<~ 
::n 
 
68 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
1 16:46:28 2 16:48:28 3 16:50:29 4 16:52:30 5 16:54:31 6 16:56:32 7 16:58:32 8 17:00:32 9 17:02:33 10 17:04:33 11 17:06:34 12 17:08:34 13 17:10:34 14 17:12:34 15 17:14:35 16 17:16:35 17 17:18:36 18 17:20:36 19 17:22:35 20 17:24:34 21 17:26:34 22 17:28:33 23 17:30:33 24 17:32:34 25 17:34:35 26 17:36:35 27 17:38:36 28 17:40:37 29 17:42:37 30 17:44:38 31 17:46:39 32 17:48:40 33 17:50:40 34 17:52:41 35 17:54:42 36 17:56:42 37 17:58:43 38 18:00:43 39 18:02:44 40 18:04:45 41 18:06:46 42 18:08:46 43 18:10:48 44 18:12:48 
 
Latitude 
31 42.12 31 42.19 31 42.24 31 42.25 31 42.25 31 42.24 31 42.24 31 42.24 31 42.23 31 42.23 31 42.21 31 42.20 31 42.18 31 42.17 31 42.17 31 42.19 31 42.21 31 42.23 31 42.25 31 42.37 31 42.43 31 42.45 31 42.45 31 42.44 31 42.43 31 42.42 31 42.41 31 42.40 31 42.39 31 42.38 31 42.37 31 42.36 31 42.35 31 42.33 31 42.33 31 42.31 31 42.30 31 42.29 31 42.28 31 42.27 31 42.27 31 42.26 31 42.25 31 42.23 
 
Longitude Depth (ft) 
80 58.38 36 80 58.51 34 80 58.66 36 80 58.81 35 80 58.95 35 80 59.11 35 80 59.25 35 80 59.39 34 80 59.54 34 80 59.69 34 80 59.82 34 80 59.96 34 80 60.09 34 80 60.24 32 80 60.39 31 80 60.54 30 80 60.70 30 80 60.86 30 80 61.01 28 80 61.07 29 80 60.99 30 80 60.89 30 80 60.80 29 80 60.73 29 80 60.66 30 80 60.58 30 80 60.50 30 80 60.42 30 80 60.35 30 80 60.27 31 80 60.19 31 80 60.12 31 80 60.03 32 80 59.96 32 80 59.88 33 80 59.79 33 80 59.71 34 80 59.63 35 80 59.54 36 80 59.47 36 80 59.38 37 80 59.29 37 80 59.21 37 80 59.15 38 
 
K-40 (cpm) 407 474 430 488 462 416 494 494 425 518 575 627 553 641 644 602 460 536 489 332 415 419 607 711 787 801 664 696 681 
685 685 614 731 592 569 658 506 660 559 541 564 491 577 579 
 
Bi-214 (cpm) 270 216 318 252 261 240 229 231 207 237 179 190 145 151 116 218 133 157 134 106 
87 92 204 139 162 248 197 191 200 197 204 182 231 218 214 197 190 202 170 204 243 217 190 147 
 
Tl-208 (cpm) 173 
90 100 
80 121 178 152 
75 168 
60 120 161 
74 122 139 162 123 185 126 
78 63 89 191 115 170 137 92 208 145 159 136 144 174 169 158 124 61 180 193 122 183 129 160 127 
 
Total (cpm) 12351 11604 11876 11178 12015 12175 10872 11302 11715 10789 10874 11193 9835 10981 11567 11096 10282 9898 9558 6945 6905 8171 11777 11676 11972 12140 12185 12250 11920 12443 12007 12417 12005 11879 11875 11709 11388 11216 11463 11241 12053 11646 12693 10905 
 
69 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
45 18:14:49 46 18:16:49 47 18:18:50 48 18:20:51 49 18:22:51 50 18:24:51 51 18:26:53 52 18:28:55 53 18:30:54 54 18:32:54 55 18:34:54 56 18:36:54 57 18:38:54 58 18:40:53 59 18:42:53 60 18:44:54 61 18:46:54 62 18:48:55 63 18:50:55 64 18:52:56 65 18:54:57 66 18:56:57 67 18:58:57 68 19:00:56 69 19:02:55 70 19:04:54 71 19:06:52 72 19:08:52 73 19:10:52 74 19:12:51 75 19:14:49 76 19:16:48 77 19:18:47 78 19:20:47 79 19:22:47 80 19:24:47 81 19:26:47 82 19:28:47 83 19:30:47 84 19:32:46 85 19:34:46 86 19:36:45 87 19:38:44 88 19:40:44 89 19:42:43 
 
Latitude 
31 42.20 31 42.17 31 42.15 31 42.11 31 42.07 31 42.02 31 41.99 31 41.95 31 41.92 31 41.88 31 41.84 31 41.80 31 41.75 31 41.70 31 41.65 31 41.59 31 41.55 31 41.51 31 41.46 31 41.42 31 41.37 31 41.34 31 41.30 31 41.27 31 41.22 31 41.19 31 41.14 31 41.10 31 41.06 31 41.02 31 40.99 31 40.94 31 40.90 31 40.85 31 40.80 31 40.75 31 40.71 31 40.67 31 40.62 31 40.57 31 40.51 31 40.47 31 40.43 31 40.39 31 40.34 
 
Longitude Depth 
(ft) 80 59.08 38 80 59.03 38 80 58.96 38 80 58.89 39 80 58.82 37 80 58.76 41 80 58.68 40 80 58.62 38 80 58.56 37 80 58.50 39 80 58.43 41 80 58.36 42 80 58.30 38 80 58.24 41 80 58.18 42 80 58.12 43 80 58.06 44 80 58.01 45 80 57.95 44 80 57.89 44 80 57.83 45 80 57.76 46 80 57.70 46 80 57.64 45 80 57.57 42 80 57.51 42 80 57.44 42 80 57.38 48 80 57.31 46 80 57.24 44 80 57.18 45 80 57.11 46 80 57.04 53 80 56.96 53 80 56.88 53 80 56.80 53 80 56.72 53 80 56.65 53 80 56.57 53 80 56.50 51 80 56.42 52 80 56.34 52 80 56.27 52 80 56.19 53 80 56.11 53 
 
K-40 
(cpm) 512 499 547 577 476 463 470 438 383 339 442 495 447 388 479 536 475 503 522 475 426 431 463 345 277 176 182 349 417 307 203 247 266 517 409 396 540 391 332 261 309 301 218 
245 238 
 
Bi-214 
(cpm) 232 173 208 145 198 197 263 172 113 
60 182 155 113 182 149 133 140 178 155 255 141 110 133 
93 102 
59 56 74 175 94 85 77 47 132 157 122 141 131 103 43 56 66 147 
59 83 
 
Tl-208 (cpm) 145 
92 116 100 103 
97 259 200 145 
33 55 87 78 66 42 137 147 126 131 180 83 75 113 34 37 54 31 94 119 63 56 42 43 106 51 83 109 90 126 88 72 63 62 
106 83 
 
Total (cpm) 10758 10947 11043 11526 10925 11069 15075 13454 9509 8596 8521 10426 8951 8855 10732 11003 11179 10988 10996 12917 10623 10419 9603 6607 6839 6316 5404 7550 9605 6773 5987 5603 5844 9849 9036 9355 8818 8618 8749 8031 7394 6852 6763 
7129 6943 
 
70 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
90 19:44:42 91 19:46:42 92 19:48:41 93 19:50:40 94 19:52:39 95 19:54:38 96 19:56:37 97 19:58:36 98 20:00:35 99 20:02:34 100 20:04:33 101 20:06:32 102 20:08:31 103 20:10:30 104 20:12:29 105 20:14:28 106 20:16:27 107 20:18:28 108 20:21:49 109 20:24:46 110 20:26:46 111 20:28:45 112 20:30:44 113 20:32:43 114 20:34:42 115 20:36:41 116 20:38:40 117 20:40:40 118 20:42:39 119 20:44:38 120 20:46:37 121 20:48:36 122 20:50:36 123 20:52:36 124 20:54:35 125 20:56:35 126 20:58:35 127 21:00:34 128 21:02:34 129 21:04:35 130 21:06:35 131 21:08:36 132 21:10:36 133 21:12:37 134 21:14:39 
 
Latitude 
31 40.30 31 40.25 31 40.20 31 40.17 31 40.13 31 40.10 31 40.07 31 40.03 31 39.98 31 39.94 31 40.01 31 40.10 31 40.17 31 40.27 31 40.33 31 40.39 31 40.46 31 40.52 31 40.63 31 40.72 31 40.78 31 40.86 31 40.94 31 41.01 31 41.06 31 41.14 31 41.20 31 41.27 31 41.33 31 41.41 31 41.47 31 41.53 31 41.60 31 41.66 31 41.72 31 41.79 31 41.86 31 41.93 31 42.00 31 42.09 31 42.20 31 42.25 31 42.29 31 42.27 31 42.22 
 
Longitude Depth 
(ft) 80 56.05 53 80 55.97 53 80 55.88 52 80 55.81 52 80 55.71 52 80 55.63 51 80 55.71 51 80 55.76 51 80 55.82 50 80 55.87 49 80 55.97 50 80 56.09 50 80 56.21 51 80 56.32 51 80 56.45 51 80 56.57 52 80 56.70 51 80 56.83 51 80 57.03 47 80 57.22 45 80 57.35 41 80 57.48 41 80 57.59 42 80 57.72 43 80 57.84 45 80 57.96 42 80 58.08 42 80 58.20 41 80 58.31 40 80 58.43 44 80 58.55 36 80 58.67 39 80 58.78 37 80 58.90 38 80 59.02 38 80 59.13 38 80 59.25 39 80 59.37 37 80 59.48 37 80 59.56 37 80 59.45 38 80 59.29 37 80 59.13 37 80 58.98 38 80 58.87 38 
 
K-40 (cpm) 222 204 255 226 252 214 305 286 251 242 156 247 239 254 229 301 248 354 526 565 498 351 276 288 233 272 265 510 208 344 243 221 424 349 245 438 358 423 368 560 535 488 493 469 465 
 
Bi-214 (cpm) 114 
87 97 102 74 54 93 68 65 34 70 92 11 100 134 115 81 61 193 217 150 150 133 66 26 104 145 123 56 119 108 86 147 145 98 139 114 174 169 129 162 354 153 232 275 
 
Tl-208 (cpm) 
88 89 41 65 
so 
40 8 
71 37 90 39 78 61 67 41 25 98 130 118 110 95 91 87 30 45 95 74 51 35 58 64 124 124 66 104 104 115 34 89 99 115 147 121 86 153 
 
Total (cpm) 6727 7932 7551 7063 7023 6539 6291 6450 6511 6397 7105 7313 7136 6571 7255 6762 7000 7771 13838 12608 8889 7374 7801 5869 5407 6888 9237 8955 6059 7209 6554 7806 8992 8521 8230 8593 9339 9039 9966 10250 10531 12090 11743 11670 13839 
 
71 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
135 21:16:41 136 21:18:41 137 21:20:41 138 21:22:42 139 21:24:42 140 22:11:44 141 22:13:43 142 22:15:42 143 22:17:43 144 22:19:42 145 22:21:46 146 22:23:45 14 7 22:25:44 148 22:27:43 149 22:29:42 150 22:31:41 151 22:33:40 152 22:35:39 153 22:37:38 154 22:39:36 155 22:41:35 156 22:43:34 157 22:45:33 158 22:47:32 159 22:49:31 160 22:51:31 161 22:53:30 162 22:55:29 163 22:57:28 164 22:59:27 165 23:01:26 166 23:03:25 167 23:05:24 168 23:07:23 169 23:09:22 170 23:11:21 171 23:13:20 172 23:15:20 173 23:17:19 174 23:19:19 175 23:21:18 176 23:23:18 177 23:25:18 178 23:27:16 179 23:29:15 
 
Latitude 
31 42.17 31 42.12 31 42.06 31 42.00 31 41.94 31 41.89 31 40.66 31 40.61 31 40.55 31 40.50 31 40.44 31 40.39 31 40.33 31 40.27 31 40.23 31 40.19 31 40.15 31 40.11 31 40.08 31 40.03 31 39.97 31 39.94 31 39.92 31 39.89 31 39.86 31 39.87 31 39.94 31 39.99 31 40.00 31 40.04 31 40.11 31 40.18 31 40.23 31 40.24 31 40.28 31 40.36 31 40.43 31 40.44 31 40.47 31 40.55 31 40.60 31 40.65 31 40.68 31 40.72 31 40.77 
 
Longitude Depth (ft) 
80 58.79 40 80 58.70 40 80 58.63 38 80 58.56 39 80 58.46 38 80 58.34 39 80 56.22 52 80 56.11 50 80 56.02 50 80 55.93 51 80 55.82 51 80 55.73 51 80 55.63 54 80 55.51 52 80 55.49 50 80 55.53 50 80 55.57 49 80 55.63 49 80 55.67 47 80 55.71 47 80 55.73 47 80 55.78 46 80 55.86 47 80 55.92 46 80 55.98 44 80 56.04 42 80 56.12 44 80 56.21 44 80 56.29 45 80 56.39 46 80 56.46 47 80 56.56 46 80 56.66 47 80 56.74 47 80 56.84 48 80 56.90 46 80 56.99 47 80 57.08 48 80 57.17 46 80 57.26 48 80 57.33 47 80 57.43 42 80 57.51 41 80 57.59 39 80 57.67 38 
 
K-40 (cpm) 397 452 566 481 359 497 310 277 244 207 306 232 263 223 279 183 256 230 231 225 242 198 268 349 345 282 269 232 219 243 272 217 241 202 251 249 280 281 439 405 444 548 463 242 229 
 
Bi-214 (cpm) 293 198 165 172 159 218 103 116 
40 56 26 116 63 78 69 52 87 33 92 63 73 70 120 89 92 130 106 106 66 111 124 134 92 100 156 54 84 114 88 100 120 153 94 58 100 
 
Tl-208 (cpm) 224 
72 93 107 127 157 116 51 98 121 107 56 53 50 89 100 99 51 32 22 85 45 50 81 108 93 85 93 92 99 47 120 72 51 95 67 91 104 137 163 109 152 100 48 66 
 
Total (cpm) 15824 9546 10939 10950 11064 10931 7805 6978 6929 7038 7514 6580 6458 6511 6433 7455 7059 6290 6186 6242 6257 6108 6724 6816 7306 7394 7337 6955 6835 6429 7198 7390 7020 7078 7127 6979 7150 7704 8796 8961 8618 9812 7873 6121 5224 
 
72 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
180 23:31:13 181 23:33:12 182 23:35:11 183 23:37:10 184 23:39:10 185 23:41:09 186 23:43:08 187 23:45:07 188 23:47:05 189 23:49:04 190 23:51:03 191 23:53:02 192 23:55:02 193 23:57:01 194 23:59:00 195 00:01:00 196 00:02:59 197 00:04:59 198 00:06:59 199 00:08:59 200 00:10:59 201 00:12:59 202 00:14:59 203 00:17:00 204 00:19:00 205 00:21:01 206 00:23:01 207 00:25:02 208 00:27:03 209 00:29:04 210 00:31:04 211 00:33:06 212 00:35:07 213 00:37:07 214 00:39:09 215 00:41:10 216 00:43:10 217 00:45:09 218 00:47:08 219 00:49:08 220 00:51:08 221 00:53:08 222 00:55:07 223 00:57:06 224 00:59:06 
 
Latitude 
31 40.82 31 40.88 31 40.90 31 40.95 31 41.01 31 41.05 31 41.10 31 41.19 31 41.23 31 41.29 31 41.32 31 41.39 31 41.47 31 41.52 31 41.53 31 41.58 31 41.64 31 41.70 31 41.75 31 41.79 31 41.85 31 41.95 31 42.06 31 42.13 31 42.24 31 42.36 31 42.47 31 42.54 31 42.48 31 42.41 31 42.34 31 42.24 31 42.15 31 41.99 31 41.92 31 41.90 31 41.87 31 41.80 31 41.71 31 41.62 31 41.54 31 41.51 31 41.46 31 41.39 31 41.30 
 
Longitude Depth (ft) 
80 57.75 38 80 57.83 38 80 57.91 38 80 58.01 41 80 58.08 38 80 58.16 38 80 58.25 36 80 58.42 36 80 58.50 36 80 58.58 38 80 58.67 40 80 58.75 34 80 58.84 34 80 58.93 34 80 59.03 31 80 59.11 32 80 59.20 33 80 59.30 33 80 59.39 34 80 59.50 34 80 59.59 32 80 59.53 35 80 59.41 34 80 59.24 35 80 59.15 32 80 59.03 32 80 58.92 32 80 58.79 32 80 58.64 31 80 58.51 30 80 58.43 30 80 58.37 31 80 58.32 31 80 58.25 30 80 58.16 32 80 57.98 30 80 57.82 29 80 57.70 29 80 57.63 34 80 57.57 34 80 57.48 33 80 57.32 32 80 57.15 30 80 57.04 38 80 56.95 40 
 
K-40 (cpm) 177 270 223 162 566 213 235 210 233 295 366 175 287 354 318 379 354 405 499 486 533 495 516 561 569 557 549 599 594 504 531 390 454 438 555 524 426 404 314 467 
337 370 244 155 538 
 
Bi-214 (cpm) 
85 22 127 127 57 92 70 21 69 82 137 112 136 132 147 151 93 75 146 190 123 280 195 133 164 223 283 236 237 329 371 192 217 422 360 273 232 201 113 139 200 157 107 138 201 
 
Tl-208 (cpm) 
58 79 64 146 95 84 76 60 53 80 63 84 112 160 113 133 123 127 120 117 131 170 148 170 116 232 204 179 170 244 226 328 216 163 269 223 183 88 30 133 112 93 123 84 126 
 
Total (cpm) 5266 5732 6293 7159 9408 6514 6832 6298 5756 6707 7081 7154 7738 8134 7406 8421 8064 9550 9299 10324 9616 11337 10435 10889 10323 12395 12194 12029 11969 12139 12612 14863 11615 11779 13583 12411 11006 8280 7635 9323 9857 9257 7328 6256 9699 
 
73 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
site Time 
225 01:01:06 226 01:03:06 227 01:05:06 228 01:07:06 229 01:09:05 230 01:11:04 231 01:13:03 232 01:15:03 233 01:17:03 234 01:19:02 235 01:21:02 236 01:23:01 237 01:25:01 238 01:27:00 239 01:28:59 240 01:30:59 241 01:32:58 242 01:34:57 243 01:36:56 244 01:38:55 245 01:40:54 246 01:42:53 247 01:44:52 248 01:46:51 249 01:48:51 250 01:50:50 251 01:52:50 252 01:54:49 253 01:56:47 254 01:58:46 255 02:00:45 256 02:02:44 257 02:04:43 258 02:06:42 259 02:08:41 260 02:10:40 261 02:12:40 262 02:14:39 263 02:16:38 264 02:18:37 265 02:20:36 266 02:22:36 267 02:24:35 268 02:26:35 269 02:28:34 
 
Latitude 
31 41.22 31 41.15 31 41.10 31 41.04 31 40.96 31 40.88 31 40.81 31 40.75 31 40.69 31 40.60 31 40.53 31 40.46 31 40.45 31 40.46 31 40.38 31 40.33 31 40.36 31 40.38 31 40.39 31 40.36 31 40.28 31 40.22 31 40.14 31 40.10 31 40.05 31 40.00 31 39.94 31 39.90 31 39.85 31 39.81 31 39.73 31 39.68 31 39.65 31 39.59 31 39.65 31 39.77 31 39.90 31 39.99 31 40.08 31 40.12 31 40.18 31 40.27 31 40.31 31 40.33 31 40.41 
 
Longitude Depth (ft) 
80 56.88 36 80 56.76 40 80 56.60 42 80 56.47 36 80 56.37 42 80 56.28 46 80 56.14 46 80 56.00 47 80 55.85 48 80 55.75 48 80 55.67 44 80 5'1.53 48 80 55.36 48 80 55.18 48 80 55.11 48 80 55.17 48 80 55.25 41 80 55.35 48 80 55.46 48 80 55.55 49 80 55.47 47 80 55.32 47 80 55.25 47 80 55.33 44 80 55.42 44 80 55.50 44 80 55.57 45 80 55.66 44 80 55.72 43 80 55.83 42 80 55.86 40 80 55.92 40 80 56.02 40 80 56.10 39 80 56.18 37 80 56.23 39 80 56.26 39 80 56.34 39 80 56.41 41 80 56.52 41 80 56.63 42 80 56.70 42 80 56.81 43 80 56.91 43 80 57.00 42 
 
K-40 (cpm) 
670 581 571 515 306 457 439 549 544 474 414 318 336 286 282 316 276 285 319 241 200 240 310 276 212 256 197 220 254 309 232 293 251 299 275 204 308 343 272 358 331 234 259 308 331 
 
Bi-214 (cpm) 
252 185 200 197 123 102 
94 100 119 107 108 109 118 
84 122 
88 109 125 
56 118 
61 116 
69 161 121 136 114 
53 99 55 79 57 80 151 175 102 166 73 92 47 70 77 127 106 114 
 
Tl-208 
(cpm) 131 
74 152 
68 22 91 48 68 118 107 122 164 72 129 97 145 186 110 149 60 90 137 81 198 151 187 168 105 108 62 89 60 51 90 146 108 90 174 71 59 117 116 111 93 132 
 
Total (cpm) 10057 9426 11369 9336 6586 7069 6729 7713 9296 8038 8166 7871 7065 6759 7113 7501 8063 7263 7236 6404 6365 6838 6847 8478 8442 8842 7670 6555 6578 6042 6239 6336 6358 6894 7798 7510 8343 8708 6627 6373 6962 7645 7124 7149 7241 
 
74 
 
 Georgia site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
270 02:30:34 271 02:32:33 272 02:34:33 273 02:36:32 274 02:38:32 275 02:40:32 276 02:42:31 277 02:44:30 278 02:46:28 279 03:34:10 280 03:36:11 281 03:38:12 282 03:40:13 283 03:42:13 284 03:44:14 285 03:46:16 286 03:48:17 287 03:50:19 288 03:52:20 289 03:54:22 290 03:56:23 291 03:58:23 292 04:00:24 293 04:02:26 294 04:04:26 295 04:06:26 296 04:08:24 297 04:10:23 298 04:12:22 299 04:14:24 300 04:16:25 301 04:18:24 302 04:20:22 303 04:22:21 304 04:24:21 305 04:26:21 306 04:28:21 307 04:30:20 308 04:32:20 309 04:34:19 310 04:36:18 311 04:38:16 312 04:40:15 313 04:42:14 314 04:44:13 
 
Latitude 
31 40.49 31 40.51 31 40.60 31 40.67 31 40.75 31 40.81 31 40.87 31 40.99 31 41.06 31 41.08 31 42.43 31 42.51 31 42.58 31 42.66 31 42.74 31 42.81 31 42.88 31 42.96 31 42.97 31 42.89 31 42.82 31 42.76 31 42.69 31 42.63 31 42.56 31 42.50 31 42.44 31 42.38 31 42.31 31 42.25 31 42.18 31 42.11 31 42.03 31 41.97 31 41.91 31 41.82 31 41.75 31 41.68 31 41.61 31 41.53 31 41.46 31 41.39 31 41.32 31 41.25 31 41.18 
 
Longitude Depth (ft) 
80 57.10 45 80 57.22 41 80 57.30 45 80 57.40 44 80 57.49 53 80 57.60 45 80 57.70 34 80 57.77 38 80 57.87 34 80 57.99 34 80 59.53 29 80 59.38 30 80 59.25 29 80 59.12 29 80 58.98 28 80 58.84 29 80 58.70 28 80 58.56 28 80 58.43 30 80 58.35 31 80 58.25 30 80 58.14 32 80 58.03 29 80 57.93 30 80 57.82 30 80 57.72 32 80 57.61 32 
80 57.51 31 
80 57.42 31 80 57.31 32 80 57.21 34 80 57.12 36 80 57.04 34 80 56.93 31 80 56.82 35 80 56.77 35 80 56.70 34 80 56.61 35 80 56.52 39 80 56.43 39 80 56.36 35 80 56.27 38 80 56.18 37 80 56.11 35 80 56.01 37 
 
K-40 (cpm) 
324 413 324 428 493 589 251 288 154 244 727 665 620 586 579 557 477 396 552 431 390 547 539 337 379 333 215 288 267 430 440 252 288 302 327 384 417 453 562 406 303 241 279 373 316 
 
Bi-214 (cpm) 140 
85 51 143 109 246 95 144 65 46 270 260 263 212 305 275 330 341 238 305 257 182 243 349 185 122 61 57 149 373 199 132 62 151 210 180 114 129 213 122 58 72 74 49 80 
 
Tl-208 (cpm) 130 
89 147 188 142 129 
56 70 57 117 208 248 168 183 190 240 357 430 251 234 260 158 209 328 143 129 75 72 100 366 215 88 52 70 148 171 80 129 104 113 38 53 44 94 71 
 
Total (cpm) 8044 7417 8184 8666 8688 9697 5777 6669 5333 6060 11918 12576 12585 12220 12332 13576 14758 15460 12789 13921 11842 11601 12308 15510 10453 7790 5998 6208 7630 15414 12338 6129 5519 7634 9098 10047 7927 8552 9779 7677 5963 5916 5428 6713 5887 
 
75 
 
 Georgia Site 1 Shipboard Data - Gamma Radiation 
 
Site Time 
315 04:46:12 316 04:48:12 317 04:50:12 318 04:52:13 319 04:54:13 320 04:56:13 321 04:58:12 322 05:00:12 323 05:02:11 324 05:04:10 325 05:06:09 326 05:08:08 327 05:10:08 328 05:12:07 329 05:14:06 330 05:16:05 331 05:18:04 332 05:20:05 
 
Latitude 
31 41.11 31 41.03 31 40.95 31 40.88 31 40.79 31 40.72 31 40.65 31 40.57 31 40.48 31 40.39 31 40.29 31 40.20 31 40.11 31 40.01 31 39.92 31 39.82 31 39.72 31 39.63 
 
Longitude Depth (ft) 
80 55.92 44 80 55.84 41 80 55.74 47 80 55.65 49 80 55.57 50 80 55.47 51 80 55.38 51 80 55.31 51 80 55.30 52 80 55.31 51 80 55.32 51 80 55.33 51 80 55.35 50 80 55.38 47 80 55.41 47 80 55.42 48 80 55.43 48 80 55.44 47 
 
K-40 
(cpm) 554 451 602 592 637 620 520 565 390 
282 293 244 358 245 272 335 280 247 
 
Bi-214 (cpm) 182 167 285 224 161 156 113 132 135 
93 94 90 126 38 119 61 70 90 
 
Tl-208 (cpm) 
103 91 
129 192 145 130 118 
70 121 138 133 133 160 217 156 148 
92 88 
 
Total (cpm) 9146 8020 11398 11467 10527 10270 8889 8769 7382 7223 6932 7285 8005 8400 7372 6926 6754 6361 
 
76 
 
 APPENDIX2 GAMMA ISOTOPE MAPPING DATA 
TARGET AREA 2 
77 
 
 Nautical Klle 
 
80 49 'W 31 35'N 
 
iN 
c-..o.J 
 
31 31'N 80 55 'W 
 
SITE 2 SHIP~ TRANSECTS GEORGIA MINERAL SURVEY 
 
31 31'N 80 49 'W 
 
 8055 'W 31 35'N 
c""o' 
 
Nautical Mile 
 
80 49 'W 31 35'N 
iN 
 
31 31'N 80 55 'W 
 
SITE 2 WATER DEPTH CONTOUR GEORGIA MINERAL SURVEY 
 
31 31'N 80 49 'W 
 
 1~ ~ 0~ ~ 
~ 
0) ~ 
D 
q<,::> 
 
~ ~ 
> 
0:: 
o::t~r.l 
0 
0...::~ 
...::1-c:x:: 
t:z:..o:: 
<~ ~z 
c:n_ r:\2~ 
-~< 
E-<0 
~0:: 
0 r::r:l 
(.!) 
 
80 
 
 8 0 o5 5 'W 31 35'N 
(_X..) 
 
Nautical Mile 
 
8 0 o 4 9 'W 31 35'N 
iN 
( 
 
31 31'N 8 0 o 5 5 'W 
 
SITE 2 TL-208 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 31'N 8 0 o 4 9 'W 
 
 ~ ~ ~ 0 ~ ~ 
~ 
(),) '1)1. 
0 
0 'b 
 
->< 
E-< 
;:>>o 
-~ E-o;> 
uo:: 
<~ Ul 
< 
~.....:l ~< 
<0:: 
z d~ 
co- 
0~ C\2 
1-c:t: 
......::~- 
E-td 
N0o:: 
~~ 
-E-<d 
Ul 
 
82 
 
 8055 'W 31 35'N 
 
Nautical Mile .... 
 
(X) 
c.> 
--?(OBI 
...... 
" 
 
31 31'N 80 55 'W 
 
SITE 2 BI-214 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
80 49 'W 31 35'N 
iN 
\ 
31 31'N 80 49 'W 
 
 ~ ~ Cl 
 
->- 
E-4 
>>- 
 
0 ~ 
Cl 
~ 
Oj ~ 
0 
co~ 
 
-~:~ 
E-t;> 
uo::: <:::> 
rn 
<~~ 
~< 
<0:: 
z ~!:! 
~.-4-~ 
 
--NI< 
~t.!l 
 
0::: 
No 
 
-Pill:! 
E-tc.!l 
rn 
 
84 
 
 8055 'W 31 35'N 
0c.0n 
 
~-------r-----,-----1 Nautleal lllle 
 
80 31 o 35 'N o 49 'W 
 
iN 
 
31 31'N 80 55 'W 
 
I 
 
)~ 
 
1 
 
r 
 
1 
 
r/ 
 
( 
 
r 
 
SITE 2 K-40 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
I 31 o 31 'N 
80 49 'W 
 
 0 ~ 
d'l 
~ 
~ 
0 "" 
<::) Q:) 
 
!>< 
~ 
->< 
;>ril 
-> 
~0:: 
u:::> 
<tzl 
<....::I 
~< ~0:: 
-<ril 
c.;Z 
0~ 
1:::s<:::0 NO:: 
-r::~o 
~t5 
en 
 
86 
 
 8055 'W 31 35'N 
 
Nautical Mile 
 
~ co~ 
 
co 
"'-~ 
 
J 
 
B0 49 'W 31 35'N 
iN 
\t 
 
31 31'N B0 55 'W 
 
SITE 2 TOTAL GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
31 31'N 80 49 'W 
 
 1.-.... 
<r> 0 ...... 
<r> 
~ 
0, ~ 
0 
q:<,:> 
 
-~ 
E-< 
>:>-- 
E--<~;> DO:: 
<:::> < Cf.l 
~~ ~< 
<O:: 
z 0~ 
< ~~ E-< 0< 
e-.NO0:: 
-~0 
E-<r-5 
l/J 
 
88 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
1 06:39:33 2 06:41:32 3 06:43:31 4 06:45:30 5 06:47:29 6 06:49:28 7 06:51:27 8 06:53:26 9 06:55:25 10 06:57:24 11 06:59:23 12 07:01:22 13 07:03:22 14 07:05:21 15 07:07:20 16 07:09:19 17 07:11:18 18 07:13:17 19 07:15:16 20 07:17:16 21 07:19:15 22 07:21:15 23 07:23:15 24 07:25:14 25 07:27:14 26 07:29:13 27 07:31:13 28 07:33:13 29 07:35:12 30 07:37:11 31 07:39:11 32 07:41:10 33 07:43:10 34 07:45:09 35 07:47:09 36 07:49:09 37 07:51:08 38 07:53:08 39 07:55:08 40 07:57:08 41 07:59:08 42 08:01:07 43 08:03:07 44 08:05:06 
 
Latitude 
31 34.78 31 34.73 31 34.68 31 34.64 31 34.59 31 34.53 31 34.49 31 34.44 31 34.40 31 34.36 31 34.31 31 34.26 31 34.22 31 34.18 31 34.12 31 34.08 31 34.03 31 33.98 31 33.93 31 33.89 31 33.84 31 33.79 31 33.74 31 33.69 31 33.64 31 33.59 31 33.54 31 33.49 31 33.44 31 33.40 31 33.35 31 33.29 31 33.25 31 33.20 31 33.14 31 33.10 31 33.05 31 32.99 31 32.94 31 32.89 31 32.84 31 32.79 31 32.74 31 32.68 
 
Longitude Depth (ft) 
80 55.83 47 80 55.73 48 80 55.61 48 80 55.50 48 80 55.42 48 80 55.33 47 80 55.23 48 80 55.13 47 80 55.03 48 80 54.94 51 80 54.85 52 80 54.75 52 80 54.65 50 80 54.55 50 
80 54.45 49 80 54.36 53 80 54.26 53 80 54.16 54 80 54.06 55 80 53.96 55 80 53.86 55 80 53.76 55 80 53.65 55 80 53.56 54 80 53.45 55 80 53.34 55 80 53.25 55 80 53.15 54 80 53.04 54 80 52.94 55 80 52.83 54 80 52.73 55 80 52.63 55 80 52.53 61 80 52.43 63 80 52.34 62 80 52.21 62 80 52.11 56 80 52.01 54 80 51.90 53 80 51.79 56 80 51.68 54 80 51.57 54 80 51.47 54 
 
K-40 (cpm) 321 233 224 167 254 228 207 266 198 361 216 199 193 258 308 220 269 282 189 213 192 255 233 277 243 225 309 164 200 219 161 167 268 266 258 407 410 404 380 382 217 126 142 195 
 
Bi-214 (cpm) 
88 74 87 164 76 37 108 154 165 109 122 112 155 172 107 133 168 105 133 140 87 144 97 196 148 106 180 118 161 92 189 116 217 194 203 140 230 228 243 169 229 203 200 193 
 
Tl-208 (cpm) 
54 170 168 118 
78 151 119 116 171 
38 129 139 152 115 
72 113 
91 83 133 148 272 186 152 105 63 169 218 102 63 164 127 113 114 125 73 110 92 127 68 102 85 99 81 69 
 
Total (cpm) 6441 7557 7309 6757 6724 7224 6448 6657 7387 5956 7445 8377 7648 7410 6845 7927 7266 6633 7207 7307 10197 8913 8964 8358 7938 8308 9306 7733 7159 8396 7608 8239 8575 8655 8360 9474 9334 9604 9132 9063 8559 9068 8603 8095 
 
89 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
45 08:07:06 46 08:09:06 47 08:11:05 48 08:13:05 49 08:15:04 50 08:17:04 51 08:19:04 52 08:21:03 53 08:23:04 54 08:25:04 55 08:27:04 56 08:29:04 57 08:31:04 58 08:33:05 59 08:35:05 60 08:37:05 61 08:39:05 62 08:41:06 63 08:43:06 64 08:45:06 65 08:47:06 66 08:49:05 67 08:51:05 68 08:53:06 69 08:55:06 70 08:57:05 71 08:59:05 72 09:01:05 73 09:03:04 74 09:05:04 75 09:07:03 76 09:09:03 77 09:11:03 78 09:13:02 79 09:15:03 80 09:17:03 81 09:19:03 82 09:21:04 83 09:23:04 84 09:25:05 85 09:27:05 86 09:29:05 87 09:31:04 88 09:33:04 89 09:35:03 
 
Latitude 
31 32.63 31 32.58 31 32.53 31 32.48 31 32.42 31 32.37 31 32.31 31 32.26 31 32.21 31 32.15 31 32.10 31 32.04 31 31.99 31 31.93 31 31.88 31 31.84 31 31.82 31 31.89 31 31.99 31 32.03 31 32.05 31 32.08 31 32.14 31 32.19 31 32.24 31 32.28 31 32.33 31 32.38 31 32.42 31 32.47 31 32.52 31 32.57 31 32.61 31 32.65 31 32.70 31 32.75 31 32.80 31 32.85 31 32.89 31 32.94 31 32.98 31 33.03 31 33.07 31 33.12 31 33.16 
 
Longitude Depth 
(ft) 80 51.35 54 80 51.26 61 80 51.15 58 80 51.04 63 80 50.93 60 80 50.82 60 80 50.71 60 80 50.60 58 80 50.48 61 80 50.36 59 80 50.25 59 80 50.14 58 80 50.02 57 80 49.91 57 80 49.97 56 80 50.05 56 80 50.14 57 80 50.21 58 80 50.27 59 80 50.37 60 80 50.47 60 80 50.57 61 80 50.67 62 80 50.76 61 80 50.86 60 80 50.96 58 80 51.05 56 80 51.15 54 80 51.24 57 80 51.34 55 80 51.43 61 80 51.53 54 80 51.63 56 80 51.73 56 80 51.83 58 80 51.93 59 80 52.03 59 80 52.12 61 80 52.22 61 80 52.32 62 80 52.40 55 80 52.50 55 80 52.59 54 80 52.68 54 80 52.78 53 
 
K-40 (cpm) 217 159 206 215 215 237 272 242 190 210 307 202 252 203 178 262 218 197 240 186 196 278 180 350 258 251 250 260 137 245 280 209 191 318 238 622 573 647 287 325 323 296 249 252 236 
 
Bi-214 (cpm) 201 197 191 166 131 155 185 181 231 204 252 197 299 209 223 249 288 249 167 197 280 213 219 180 176 201 196 176 185 220 221 188 209 261 186 120 130 196 191 227 213 196 207 176 166 
 
Tl-208 (cpm) 
90 76 98 46 112 55 132 136 159 87 111 194 184 118 168 125 147 192 94 101 59 62 212 141 69 82 82 29 64 61 99 120 72 296 158 239 202 161 279 201 132 76 128 53 70 
 
Total (cpm) 8343 7941 8988 8682 8916 7981 9530 10062 9997 9560 9488 11623 11267 9476 10084 10444 10830 10513 8876 9643 9323 8561 11797 10065 8080 8532 8799 8211 8169 8195 8665 8802 8795 12552 8833 11431 10791 11046 11818 9885 9325 8085 8419 7979 7078 
 
90 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
90 09:37:02 91 09:39:01 92 09:41:01 93 09:43:00 94 09:45:00 95 09:46:59 96 09:48:59 97 09:50:58 98 09:52:58 99 09:54:57 100 09:56:56 101 09:58:56 102 10:00:55 103 10:02:55 104 10:04:54 105 10:06:53 106 10:08:52 107 10:10:51 108 10:12:50 109 10:14:49 110 10:16:49 111 10:18:48 112 10:20:47 113 10:22:46 114 10:24:45 115 10:26:44 116 10:28:43 117 10:30:42 118 10:32:41 119 10:34:40 120 10:36:39 121 10:38:38 122 10:40:37 123 10:42:35 124 10:44:34 125 10:46:34 126 10:48:33 127 10:50:32 128 10:52:31 129 10:54:30 130 10:56:29 131 10:58:29 132 11:00:28 133 11:02:27 134 11:04:26 
 
Latitude 
31 33.20 31 33.25 31 33.29 31 33.33 31 33.38 31 33.42 31 33.47 31 33.50 31 33.54 31 33.59 31 33.64 31 33.68 31 33.72 31 33.76 31 33.80 31 33.84 31 33.88 31 33.93 31 33.97 31 34.00 31 34.05 31 34.08 31 34.12 31 34.17 31 34.20 31 34.24 31 34.29 31 34.33 31 34.37 31 34.40 31 34.44 31 34.49 31 34.53 31 34.57 31 34.61 31 34.65 31 34.69 31 34.73 31 34.77 31 34.82 31 34.86 31 34.91 31 34.97 31 35.04 31 35.11 
 
Longitude Depth (ft) 
80 52.87 54 80 52.96 53 80 53.05 53 80 53.14 53 80 53.23 54 80 53.30 54 80 53.40 53 80 53.48 53 80 53.57 53 80 53.66 52 80 53.75 52 80 53.83 51 80 53.92 51 80 54.00 49 80 54.09 48 80 54.18 50 80 54.27 50 80 54.35 49 80 54.44 53 80 54.52 49 80 54.61 51 80 54.70 49 80 54.78 50 80 54.86 46 80 54.94 46 80 55.03 45 80 55.10 46 80 55.19 46 80 55.27 44 80 55.36 46 80 55.44 46 80 55.53 50 80 55.61 50 80 55.70 46 80 55.79 43 80 55.88 44 80 55.96 44 80 56.04 44 80 56.12 44 80 56.21 48 80 56.30 45 80 56.37 43 80 56.44 48 80 56.49 49 80 56.37 48 
 
K-40 (cpm) 218 210 238 177 208 232 245 201 166 231 247 237 283 252 256 324 238 251 177 242 217 242 241 354 263 292 213 209 330 186 176 245 244 215 305 331 229 291 300 298 310 307 319 297 289 
 
Bi-214 (cpm) 148 167 221 194 196 
41 110 149 118 139 223 141 188 141 125 147 122 160 152 105 
83 89 49 127 67 45 98 89 82 108 125 111 114 78 73 132 81 128 89 64 163 49 146 111 108 
 
Tl-208 (cpm) 
75 76 100 122 164 125 127 135 99 97 167 86 120 111 88 84 43 112 99 74 89 126 92 62 26 44 99 147 88 56 98 79 80 87 46 125 93 37 48 161 115 102 124 111 56 
 
Total (cpm) 7101 7335 8325 8117 7924 7982 7819 8164 8326 7815 8416 7602 7472 7222 7091 6865 6633 7766 8008 7610 6665 7836 7436 7235 6173 6012 6469 7284 6557 6308 7064 6224 6175 6912 8036 8022 6443 6600 6531 8703 8006 6861 7872 7499 6690 
 
91 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
135 11:06:25 136 11:08:24 137 11:10:23 138 11:12:22 139 11:14:22 140 11:16:21 141 11:18:21 142 11:20:19 143 11:22:19 144 11:24:18 145 11:26:16 146 11:28:16 147 11:30:15 148 11:32:14 149 11:34:13 150 11:36:13 151 11:38:13 152 11:40:11 153 11:42:11 154 11:44:10 155 11:46:10 156 11:48:10 157 11:50:10 158 11:52:10 159 11:54:10 160 11:56:09 161 11:58:09 162 12:00:08 163 12:02:08 164 12:04:08 165 12:06:07 166 12:08:07 167 12:10:06 168 12:12:06 169 12:14:05 170 12:16:04 171 12:18:04 172 12:20:04 173 12:22:04 174 12:24:04 175 12:26:03 176 12:28:03 177 12:30:04 178 12:32:04 179 12:34:05 
 
Latitude 
31 35.15 31 35.17 31 35.12 31 35.04 31 34.97 31 34.91 31 34.84 31 34.78 31 34.72 31 34.66 31 34.59 31 34.52 31 34.47 31 34.39 31 34.33 31 34.26 31 34.19 31 34.13 31 34.06 31 33.99 31 33.92 31.33.84 31 33.77 31 33.70 31 33.63 31 33.56 31 33.50 31 33.43 31 33.36 31 33.29 31 33.22 31 33.15 31 33.08 31 33.01 31 32.94 31 32.87 31 32.80 31 32.73 31 32.66 31 32.59 31 32.52 31 32.44 31 32.37 31 32.30 31 32.23 
 
Longitude Depth (ft) 
80 56.20 50 80 56.04 52 80 55.89 47 80 55.78 47 80 55.66 46 80 55.53 44 80 55.39 45 80 55.25 51 80 55.11 50 80 54.98 50 80 54.85 48 80 54.71 49 80 54.57 52 80 54.43 52 80 54.29 54 80 54.16 53 80 54.03 52 80 53.89 54 80 53.75 54 80 53.62 54 80 53.47 53 80 53.34 54 80 53.20 54 80 53.06 51 80 52.92 50 80 52.78 52 80 52.63 51 80 52.50 52 80 52.36 51 80 52.22 51 80 52.08 50 80 51.94 51 80 51.79 50 80 51.65 49 80 51.52 51 80 51.38 56 80 51.24 59 80 51.09 58 80 50.94 58 80 50.81 54 80 50.67 56 80 50.52 55 80 50.38 55 80 50.25 54 80 50.10 54 
 
K-40 (cpm) 265 
334 228 248 489 319 240 239 269 294 232 233 352 234 233 191 344 372 382 397 250 132 313 224 115 145 297 173 179 226 285 174 255 172 255 201 142 202 170 204 359 264 343 243 338 
 
Bi-214 (cpm) 
87 133 
52 46 94 103 111 107 83 82 183 101 93 132 191 116 150 113 133 105 190 125 113 152 103 146 172 139 191 155 195 213 163 199 163 199 132 193 257 175 233 129 151 274 224 
 
Tl-208 (cpm) 
60 103 128 
93 167 142 
87 100 
94 136 143 
36 43 141 185 149 38 93 75 170 198 144 142 169 84 161 89 117 170 42 42 138 65 26 124 126 98 116 87 90 174 224 280 186 109 
 
Total (cpm) 7090 8142 7034 6736 9339 8223 6405 6623 6754 6710 8540 6143 7213 8497 8160 9104 6287 7831 7704 9664 9498 9072 9251 9438 7994 8714 7900 8173 10034 8092 7831 8378 7617 7839 8637 9085 8079 9002 9635 8535 10628 10624 10453 10823 9539 
 
92 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
180 12:36:04 181 12:38:05 182 12:40:05 183 12:42:04 184 12:44:04 185 12:46:04 186 12:48:04 187 12:50:04 188 12:52:04 189 12:54:04 190 12:56:04 191 12:58:04 192 13:00:04 193 13:02:04 194 13:04:04 195 13:06:04 196 13:08:04 197 13:10:05 198 13:12:06 199 13:14:08 200 13:16:09 201 13:18:09 202 13:20:10 203 13:22:10 204 13:24:11 205 13:26:11 206 13:28:11 207 13:30:11 208 13:32:12 209 13:34:12 210 13:36:11 211 13:38:11 212 13:40:11 213 13:42:12 214 13:44:12 215 13:46:14 216 13:48:16 217 13:50:17 218 13:52:17 219 13:54:17 220 13:56:19 221 13:58:19 222 14:00:18 223 14:02:17 224 14:04:16 
 
Latitude 
31 32.16 31 32.09 31 32.03 31 31.93 31 31.87 31 31.87 31 31.84 31 31.81 31 31.77 31 31.73 31 31.70 31 31.69 31 31.67 31 31.73 31 31.77 31 31.81 31 31.84 31 31.88 31 31.93 31 31.96 31 32.00 31 32.04 31 32.09 31 32.13 31 32.18 31 32.21 31 32.26 31 32.31 31 32.36 31 32.40 31 32.45 31 32.51 31 32.56 31 32.60 31 32.63 31 32.68 31 32.72 31 32.77 31 32.81 31 32.85 31 32.89 31 32.94 31 32.98 31 33.03 31 33.07 
 
Longitude Depth 
(ft) 80 49.96 54 80 49.82 54 80 49.67 53 80 49.60 51 80 49.66 51 80 49.75 51 80 49.83 51 80 49.91 51 80 49.98 51 80 50.07 51 80 50.15 52 80 50.24 53 80 50.32 54 80 50.39 56 80 50.46 58 80 50.55 55 80 50.63 51 80 50.72 53 80 50.81 53 80 50.89 51 80 50.98 52 80 51.06 52 80 51.15 53 80 51.23 54 80 51.32 53 
80 51.42 51 80 51.51 50 80 51.60 53 80 51.69 52 80 51.78 51 80 51.86 49 80 51.93 49 80 52.02 52 80 52.12 53 80 52.21 54 80 52.30 52 80 52.39 47 80 52.48 47 80 52.57 48 80 52.66 47 80 52.75 45 80 52.84 46 80 52.93 47 80 53.02 46 80 53.11 47 
 
K-40 (cpm) 271 277 231 256 269 274 339 238 296 196 171 303 247 265 225 196 226 220 176 277 289 174 275 198 162 177 247 269 249 282 247 208 501 473 182 129 179 214 350 156 250 216 186 219 124 
 
Bi-214 (cpm} 238 191 210 159 178 252 212 208 244 251 255 284 273 256 203 256 177 326 360 307 223 244 189 237 235 138 276 252 187 207 
96 150 134 256 289 391 234 111 209 276 135 168 130 
91 145 
 
Tl-208 (cpm) 
77 125 108 
66 126 
50 93 64 121 45 97 61 105 154 124 102 135 283 318 226 80 256 166 121 208 125 64 120 98 102 98 254 223 189 414 510 309 185 353 521 94 35 102 43 86 
 
Total (cpm} 9673 9528 9530 9279 9662 9537 9211 8971 9628 9690 9873 9686 9432 9365 9635 9989 10341 13620 15683 13169 9655 11993 10576 10017 11461 9572 9934 10417 10170 8351 8116 10581 11373 10298 15291 15901 12131 9951 10706 15110 8440 7419 7349 6870 7132 
 
93 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
225 14:06:15 226 14:08:15 227 14:10:14 228 14:12:13 229 14:14:12 230 14:16:12 231 14:18:11 232 14:20:11 233 14:22:10 234 14:24:10 235 14:26:09 236 14:28:09 237 14:30:09 238 14:32:09 239 14:34:09 240 14:36:09 241 14:38:09 242 14:40:09 243 14:42:09 244 14:44:08 245 14:46:08 246 14:48:07 247 14:50:07 248 14:52:06 249 14:54:06 250 14:56:05 251 14:58:04 252 15:00:04 253 15:02:03 254 15:04:05 255 15:06:06 256 15:08:06 257 15:10:06 258 15:12:06 259 15:14:06 260 15:16:05 261 15:18:05 262 15:20:04 263 15:22:04 264 15:24:04 265 15:26:03 266 15:28:04 267 15:30:05 268 15:32:05 269 15:34:05 
 
Latitude 
31 33.11 31 33.14 31 33.18 31 33.23 31 33.27 31 33.35 31 33.44 31 33.51 31 33.61 31 33.69 31 33.79 31 33.90 31 34.01 31 33.96 31 33.91 31 33.85 31 33.80 31 33.74 31 33.67 31 33.62 31 33.57 31 33.52 31 33.45 31 33.39 31 33.33 31 33.28 31 33.22 31 33.16 31 33.10 31 33.05 31 33.00 31 32.93 31 32.87 31 32.82 31 32.76 31 32.70 31 32.65 31 32.58 31 32.50 31 32.44 31 32.39 31 32.33 31 32.25 31 32.16 31 32.09 
 
Longitude Depth 
(ft) 80 53.19 47 80 53.28 48 80 53.38 49 80 53.47 50 80 53.56 49 80 53.61 51 80 53.52 52 80 53.40 51 80 53.32 52 80 53.21 54 80 53.12 53 80 53.08 54 80 53.07 52 80 52.96 52 80 52.85 51 80 52.73 51 80 52.61 50 80 52.50 51 80 52.39 51 80 52.26 50 80 52.14 51 80 52.04 50 80 51.93 51 80 51.82 50 80 51.71 50 80 51.60 50 80 51.50 51 80 51.38 50 80 51.27 50 80 51.16 52 80 51.06 53 80 50.95 53 80 50.85 54 80 50.75 54 80 50.64 56 80 50.53 57 80 50.43 56 80 50.33 56 80 50.22 57 80 50.08 55 80 49.94 52 80 49.81 51 80 49.73 50 80 49.76 54 80 49.80 57 
 
K-40 (cpm) 222 223 265 256 280 207 265 256 271 278 266 312 210 281 329 158 300 221 271 282 188 163 292 191 208 174 234 264 174 271 198 129 317 208 198 193 274 309 241 377 285 199 225 296 233 
 
Bi-214 (cpm) 190 
99 94 123 154 99 170 133 171 220 204 192 164 175 164 108 170 154 157 214 183 104 137 147 155 175 171 205 200 266 211 131 223 167 224 200 166 210 199 263 255 220 259 157 183 
 
Tl-208 
(cpm) 90 83 
123 84 
133 150 107 133 147 148 
86 192 154 169 300 210 139 172 
95 143 
62 140 
37 55 64 102 71 174 450 377 111 132 152 118 83 61 37 53 56 100 347 240 189 105 138 
 
Total (cpm) 8031 7423 7423 7825 8113 7948 8203 7965 8204 9036 8499 9602 9384 9806 10604 9850 8618 10244 8273 8282 8093 8611 7646 7548 7473 7779 7753 9108 14798 11888 8823 9421 9296 9158 8281 8593 8543 8490 8567 8942 12304 10657 9993 9283 9213 
 
94 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
270 15:36:04 271 15:38:04 272 15:40:05 273 15:42:05 274 15:44:05 275 15:46:05 276 15:48:05 277 15:50:06 278 15:52:06 279 15:54:07 280 15:56:07 281 15:58:08 282 16:00:08 283 16:02:09 284 16:04:10 285 16:06:11 286 16:08:12 287 16:10:13 288 16:12:13 289 16:14:13 290 16:16:13 291 16:18:12 292 16:20:12 293 16:22:11 294 16:24:12 295 16:26:14 296 16:28:14 297 16:30:14 298 16:32:14 299 16:34:14 300 16:36:15 301 16:38:15 302 16:40:15 303 16:42:14 304 16:44:13 305 16:46:12 306 16:48:12 307 16:50:11 308 16:52:10 309 16:54:10 310 16:56:09 311 16:58:09 312 17:00:09 313 17:02:09 314 17:04:08 
 
Latitude 
31 32.03 31 31.97 31 31.87 31 31.75 31 31.65 31 31.59 31 31.52 31 31.45 31 31.49 31 31.53 31 31.58 31 31.65 31 31.73 31 31.76 31 31.81 31 31.86 31 31.91 31 31.97 31 32.03 31 32.08 31 32.12 31 32.17 31 32.25 31 32.31 31 32.32 31 32.36 31 32.45 31 32.53 31 32.53 31 32.56 31 32.64 31 32.71 31 32.77 31 32.81 31 32.86 31 32.91 31 32.97 31 33.06 31 33.05 31 33.17 31 33.23 31 33.33 31 33.33 31 33.48 31 33.60 
 
Longitude Depth (ft) 
80 49.86 52 80 49.96 56 80 50.01 57 80 50.04 62 80 50.12 56 80 50.22 57 80 50.32 55 80 50.40 57 80 50.52 54 80 50.63 53 80 50.74 59 80 50.82 60 80 50.90 56 80 51.00 56 80 51.10 58 80 51.21 58 80 51.32 58 80 51.43 53 80 51.53 53 80 51.64 53 80 51.75 53 80 51.87 52 80 51.93 51 80 52.04 51 80 52.16 51 80 52.27 52 80 52.33 52 80 52.43 52 80 52.54 53 80 52.66 50 80 52.74 51 80 52.83 47 80 52.93 47 80 53.04 48 80 53.17 49 80 53.29 49 80 53.40 46 80 53.52 45 80 53.58 49 80 53.68 47 80 53.80 49 80 53.88 50 80 54.04 50 80 54.07 51 80 54.04 51 
 
K-40 (cpm) 144 200 172 297 326 336 306 388 489 374 394 314 364 329 259 346 532 260 264 383 357 414 244 178 222 
201 255 311 194 183 291 329 281 329 206 213 172 160 292 203 174 253 188 257 201 
 
Bi-214 (cpm) 181 216 220 231 263 268 352 247 270 301 240 287 218 222 299 
338 283 346 289 225 210 120 135 319 291 203 254 268 207 264 248 229 125 228 148 133 174 151 178 215 144 209 202 129 158 
 
Tl-208 (cpm) 120 133 148 152 109 178 239 125 159 115 146 284 215 196 244 122 117 111 142 103 
70 81 86 291 517 66 99 164 141 454 122 117 79 47 74 81 78 106 100 135 75 281 229 88 70 
 
Total (cpm) 9271 10318 10096 10100 8948 10648 12190 10101 11764 11092 11243 12003 11569 13375 12556 11109 11582 10034 11474 8576 8294 8835 7683 12116 15328 8803 9988 10039 9536 13281 8977 8877 7294 7168 7839 7380 7677 8245 7868 8124 8538 11111 9631 7084 7441 
 
95 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
315 17:06:08 316 17:08:07 317 17:10:06 318 17:12:05 319 17:14:04 320 17:16:03 321 17:18:02 322 17:20:01 323 17:22:00 324 17:23:59 325 17:25:59 326 17:27:59 327 17:29:59 328 17:32:00 329 17:34:00 330 17:36:00 331 17:38:01 332 17:40:00 333 17:42:00 334 17:43:59 335 17:45:59 336 17:47:59 337 17:49:59 338 17:51:59 339 17:53:58 340 17:55:58 341 17:57:58 342 17:59:58 343 18:01:57 344 18:03:56 345 18:05:56 346 18:07:55 347 18:09:54 348 18:11:54 349 18:13:53 350 18:15:52 351 18:17:52 352 18:19:54 353 18:21:54 354 18:23:54 355 18:25:53 356 18:27:53 357 18:29:52 358 18:31:52 359 18:33:52 
 
Latitude 
31 33.67 31 33.80 31 33.92 31 34.05 31 34.17 31 34.21 31 34.19 31 34.16 31 34.12 31 34.08 31 34.04 31 34.00 31 33.97 31 33.94 31 33.90 31 33.86 31 33.82 31 33.79 31 33.85 31 33.93 31 33.99 31 34.03 31 34.00 31 33.95 31 33.91 31 33.92 31 33.73 31 33.74 31 33.71 31 33.64 31 33.61 31 33.55 31 33.49 31 33.44 31 33.39 31 33.33 31 33.29 31 33.24 31 33.18 31 33.14 31 33.08 31 33.03 31 32.98 31 32.92 31 32.88 
 
Longitude Depth (ft) 
80 54.07 52 80 53.99 53 80 53.98 54 80 53.97 54 80 53.96 54 80 53.88 55 80 53.77 55 80 53.67 55 80 53.57 56 80 53.46 56 80 53.36 56 80 53.26 56 80 53.15 58 80 53.04 58 80 52.94 58 80 52.85 60 80 52.75 57 80 52.64 58 80 52.54 60 80 52.44 57 80 52.33 55 80 52.23 55 80 52.14 56 80 52.03 58 80 51.97 57 80 51.91 58 80 51.78 57 80 51.74 56 80 51.63 55 80 51.54 57 80 51.45 61 80 51.36 56 80 51.28 56 80 51.20 57 80 51.11 57 80 51.02 58 80 50.94 58 80 50.86 58 80 50.76 58 80 50.68 59 80 50.60 58 80 50.52 59 80 50.44 59 80 50.36 61 80 50.28 63 
 
K-40 (cpm) 265 314 230 238 219 210 286 213 295 288 196 126 204 303 246 
115 205 211 259 348 345 256 295 336 247 287 182 236 343 323 242 188 274 155 274 237 133 256 181 287 234 266 183 210 293 
 
Bi-214 (cpm) 110 
77 110 143 124 130 
89 58 124 219 172 228 278 97 194 163 161 171 238 198 289 169 193 289 233 194 157 174 133 143 207 143 176 209 190 178 275 276 186 225 155 193 201 150 220 
 
Tl-208 
(cpm) 65 73 
118 87 60 60 55 66 
131 204 298 279 289 150 259 298 
64 147 123 105 127 179 
96 123 142 149 103 107 
92 129 103 123 105 
79 62 49 499 148 119 91 76 100 115 74 80 
 
Total (cpm) 7165 7253 7202 6930 6329 6262 6604 6668 8286 9124 10149 10897 11925 8714 11252 11411 8435 9247 8507 8935 9525 9804 8625 8867 9534 9532 8130 7651 7476 7894 7818 7998 7599 7762 8049 8532 15242 9653 8546 8438 8916 8713 8793 9016 8887 
 
96 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
360 18:35:52 361 18:37:51 362 18:39:51 363 18:41:51 364 18:43:51 365 18:45:50 366 18:47:50 367 18:49:52 368 18:51:52 369 18:53:52 370 18:55:52 371 18:57:53 372 18:59:53 373 19:01:53 374 19:03:52 375 19:05:53 376 19:07:53 377 19:09:53 378 19:11:53 379 19:13:54 380 19:15:53 381 19:17:53 382 19:19:53 383 19:21:54 384 19:23:54 385 19:25:54 386 19:27:54 387 19:29:54 388 19:31:54 389 19:33:55 390 19:35:55 391 19:37:57 392 19:39:57 393 19:41:58 394 19:43:58 395 19:45:58 396 19:47:59 397 19:49:59 398 19:51:58 399 19:53:59 400 19:55:59 401 19:57:59 402 19:59:59 403 20:01:58 404 20:03:59 
 
Latitude 
31 32.82 31 32.77 31 32.72 31 32.68 31 32.62 31 32.57 31 32.52 31 32.48 31 32.42 31 32.35 31 32.29 31 32.22 31 32.15 31 32.09 31 32.01 31 31.94 31 31.87 31 31.80 31 31.73 31 31.66 31 31.59 31 31.51 31 31.45 31 31.38 31 31.30 31 31.26 31 31.36 31 31.47 31 31.58 31 31.66 31 31.75 31 31.82 31 31.91 31 32.00 31 32.11 31 32.21 31 32.26 31 32.29 31 32.30 31 32.35 31 32.40 31 32.45 31 32.50 31 32.54 31 32.59 
 
Longitude Depth (ft) 
80 50.19 62 80 50.12 62 80 50.04 62 80 49.96 62 80 49.88 61 80 49.79 61 80 49.70 61 80 49.61 61 80 49.56 59 80 49.62 59 80 49.70 57 80 49.75 57 80 49.82 56 80 49.87 59 80 49.93 62 80 50.00 59 80 50.05 62 80 50.10 64 80 50.16 62 80 50.23 61 80 50.28 61 80 50.34 60 80 50.41 60 80 50.46 59 80 50.52 59 80 50.61 63 80 50.70 65 80 50.77 59 80 50.88 61 80 50.98 63 80 51.11 65 80 51.22 58 80 51.34 58 80 51.44 58 80 51.53 59 80 51.62 58 80 51.75 57 80 51.89 57 80 52.01 55 80 52.14 56 80 52.28 55 80 52.40 57 80 52.52 56 80 52.65 54 80 52.78 50 
 
K-40 (cpm) 188 265 231 118 210 340 131 306 309 212 254 297 249 253 290 248 231 230 194 286 319 238 427 467 358 351 394 326 348 379 218 433 414 230 402 338 405 261 198 339 346 288 230 124 257 
 
Bi-214 (cpm) 245 168 215 278 240 300 270 186 316 219 193 240 270 206 266 222 320 339 263 196 209 308 356 182 244 189 298 189 331 345 423 216 213 287 388 324 202 156 236 160 235 234 241 318 210 
 
Tl-208 (cpm) 
94 60 93 64 66 81 429 186 182 155 163 125 178 101 187 170 163 132 107 36 112 231 133 81 97 106 149 144 221 154 249 139 188 139 119 164 100 56 234 246 113 89 96 335 241 
 
Total (cpm) 9140 8896 8839 9370 8542 8740 14882 10454 10574 10136 10119 9660 9890 9212 9805 10923 10600 10184 10101 8658 9107 11325 11227 9442 9331 9774 10584 10219 11545 11763 13432 10831 11128 11285 10497 11456 9601 7780 10893 10718 9148 9217 8688 12152 10791 
 
97 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
405 20:06:00 406 20:07:59 407 20:09:59 408 20:11:59 409 20:13:58 410 20:15:57 411 20:17:57 412 20:19:56 413 20:21:55 414 20:23:54 415 20:25:54 416 20:27:54 417 20:29:53 418 20:31:53 419 20:33:53 420 20:35:52 421 20:37:52 422 20:39:51 423 20:41:51 424 20:43:51 425 20:45:51 426 20:47:52 427 20:49:52 428 20:51:53 429 20:53:53 430 20:55:52 431 20:57:51 432 20:59:51 433 21:01:51 434 21:03:51 435 21:05:51 436 21:07:51 437 21:09:51 438 21:11:51 439 21:13:50 440 21:15:50 441 21:17:49 442 21:19:49 443 21:21:48 444 21:23:48 445 21:25:47 446 21:27:47 447 21:29:48 448 21:31:47 449 21:33:47 
 
Latitude 
31 32.64 31 32.69 31 32.74 31 32.79 31 32.83 31 32.88 31 32.92 31 32.95 31 32.96 31 32.99 31 33.11 31 33.22 31 33.31 31 33.38 31 33.46 31 33.59 31 33.69 31 33.78 31 33.88 31 33.98 31 34.08 31 34.19 31 34.29 31 34.37 31 34.35 31 34.31 31 34.25 31 34.18 31 34.13 31 34.07 31 34.02 31 33.96 31 33.91 31 33.85 31 33.80 31 33.74 31 33.69 31 33.63 31 33.57 31 33.51 31 33.45 31 33.39 31 33.33 31 33.27 31 33.22 
 
Longitude Depth (ft) 
80 52.91 51 80 53.04 52 80 53.15 51 80 53.27 52 80 53.41 50 80 53.52 51 80 53.64 53 80 53.76 54 80 53.87 55 80 53.99 56 80 54.00 57 80 53.92 58 80 53.82 59 80 53.69 60 80 53.57 61 80 53.49 62 80 53.40 61 80 53.30 59 80 53.19 60 80 53.09 61 80 52.99 67 80 52.90 64 80 52.79 62 80 52.68 61 80 52.55 60 80 52.43 59 80 52.33 59 80 52.23 60 80 52.14 61 80 52.05 59 80 51.94 59 80 51.84 62 80 51.74 62 80 51.64 60 80 51.54 59 80 51.44 59 80 51.34 59 80 51.24 59 80 51.15 60 80 51.04 61 80 50.94 62 80 50.84 61 80 50.74 61 80 50.64 61 80 50.53 61 
 
K-40 (cpm) 228 262 260 329 249 264 211 348 181 194 225 168 198 265 202 211 340 263 326 241 358 349 650 472 302 324 301 372 286 239 195 280 244 177 203 260 179 159 282 287 364 274 211 240 194 
 
Bi-214 (cpm) 168 174 209 186 139 193 151 187 190 168 195 189 123 208 185. 130 201 236 288 194 160 239 140 200 230 158 191 187 180 234 190 175 136 173 
lOB 187 135 176 169 162 234 162 206 158 213 
 
Tl-208 (cpm) 
96 168 100 
77 50 93 59 33 117 119 121 160 184 175 179 140 105 125 200 259 338 212 214 133 65 53 136 179 107 176 279 236 140 121 140 149 145 105 105 92 128 224 91 115 77 
 
Total (cpm) 8031 9435 8606 7375 7052 7852 7606 7651 7562 8657 7727 8697 9563 8790 8516 8093 8270 8739 9848 10710 11985 10425 11020 9627 8062 7308 9881 9567 8660 9487 11028 10368 9179 8275 7868 8649 8889 8002 7632 8163 10109 10095 8642 8712 9121 
 
98 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
450 21:35:47 451 21:37:47 452 21:39:46 453 21:41:46 454 21:43:46 455 21:45:46 456 21:47:46 457 21:49:46 458 21:51:47 459 21:53:47 460 21:55:48 461 21:57:48 462 21:59:49 463 22:01:49 464 22:03:49 465 22:05:50 466 22:07:52 467 22:09:52 468 22:11:52 469 22:13:52 470 22:15:52 471 22:17:52 472 22:19:51 473 22:21:51 474 22:23:51 475 22:25:51 476 22:27:51 477 22:29:51 478 22:31:51 479 22:33:51 480 22:35:51 481 22:37:52 482 22:39:52 483 22:41:51 484 22:43:52 485 22:45:53 486 22:47:53 487 22:49:53 488 22:51:53 489 22:53:53 490 22:55:53 491 22:57:53 492 22:59:53 493 23:01:53 494 23:03:54 
 
Latitude 
31 33.15 31 33.10 31 33.04 31 32.99 31 32.93 31 32.87 31 32.80 31 32.74 31 32.67 31 32.61 31 32.56 31 32.49 31 32.43 31 32.35 31 32.28 31 32.22 31 32.17 31 32.10 31 32.04 31 31.99 31 31.94 31 31.87 31 31.79 31 31.72 31 31.65 31 31.60 31 31.54 31 31.50 31 31.48 31 31.45 31 31.43 31 31.41 31 31.38 31 31.35 31 31.29 31 31.24 31 31.19 31 31.17 31 31.20 31 31.27 31 31.31 31 31.34 31 31.37 31 31.41 31 31.44 
 
Longitude Depth (ft) 
80 50.44 66 80 50.33 65 80 50.23 64 80 50.13 62 80 50.02 64 80 49.93 64 80 49.81 63 
80 49.71 63 80 49.60 61 80 49.50 61 80 49.37 60 80 49.30 60 80 49.32 60 80 49.33 59 80 49.33 59 80 49.37 58 80 49.42 56 80 49.45 56 80 49.47 56 80 49.53 56 80 49.58 55 80 49.61 55 80 49.64 56 80 49.67 59 80 49.70 59 80 49.74 59 80 49.79 57 80 49.84 58 80 49.90 59 80 49.97 60 80 50.04 60 80 50.11 62 80 50.18 59 80 50.24 59 80 50.31 59 80 50.38 57 80 50.45 59 80 50.53 58 80 50.59 62 80 50.65 62 80 50.72 59 80 50.80 61 80 50.88 58 80 50.95 62 80 51.03 64 
 
K-40 (cpm) 162 204 219 193 217 225 177 248 306 367 247 250 405 444 318 188 260 342 206 282 255 322 325 295 235 236 217 292 228 198 276 241 250 242 263 254 325 328 406 351 315 418 297 245 274 
 
Bi-214 (cpm) 177 197 163 143 183 252 200 246 219 295 274 322 195 251 337 300 302 290 201 234 260 283 141 335 253 260 246 296 284 281 354 294 247 302 241 209 185 187 208 211 255 195 184 224 246 
 
Tl-208 (cpm) 
97 74 98 147 210 235 132 136 140 142 153 153 92 118 399 395 179 141 112 156 128 72 117 90 94 110 77 101 149 161 70 64 81 210 290 133 64 136 156 151 178 161 197 251 138 
 
Total (cpm) 8359 8309 8417 9041 10344 10886 10017 10727 9872 11386 10754 11465 9708 10329 14481 13901 10731 9889 9166 8913 9201 9357 8868 9223 9560 9474 9479 9276 9657 10856 11456 9760 9229 11662 11724 10655 7565 10049 10045 9689 10231 9574 10684 12121 10642 
 
99 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
495 23:05:54 496 23:07:55 497 23:09:56 498 23:11:56 499 23:13:56 500 23:15:56 501 23:17:56 502 23:19:56 503 23:21:56 504 23:23:55 505 23:25:54 506 23:27:54 507 23:29:54 508 23:31:55 509 23:33:55 510 23:35:55 511 23:37:55 512 23:39:55 513 23:41:55 514 23:43:55 515 23:45:54 516 23:47:54 517 23:49:53 518 23:51:54 519 23:53:54 520 23:55:53 521 23:57:52 522 23:59:52 523 00:01:51 524 00:03:51 525 00:05:50 526 00:07:50 527 00:09:49 528 00:11:48 529 00:13:47 530 00:15:46 531 00:17:45 532 00:19:45 533 00:21:44 534 00:23:43 535 00:25:43 536 00:27:42 537 00:29:42 538 00:31:41 539 00:33:40 
 
Latitude 
31 31.49 31 31.51 31 31.58 31 31.62 31 31.57 31 31.65 31 31.70 31 31.74 31 31.77 31 31.81 31 31.84 31 31.87 31 31.91 31 31.95 31 31.99 31 32.03 31 32.07 31 32.11 31 32.15 31 32.18 31 32.21 31 32.25 31 32.28 31 32.33 31 32.36 31 32.40 31 32.43 31 32.46 31 32.49 31 32.51 31 32.54 31 32.58 31 32.61 31 32.64 31 32.67 31 32.70 31 32.73 31 32.77 31 32.80 31 32.73 31 32.64 31 32.56 31 32.48 31 32.44 31 32.37 
 
Longitude Depth 
(ft) 80 51.11 62 80 51.16 60 80 51.22 59 80 51.29 57. 80 51.37 57 80 51.47 56 80 51.55 56 80 51.63 55 80 51.71 56 80 51.79 56 80 51.87 54 80 51.94 55 80 52.01 52 80 52.10 51 80 52.18 48 80 52.26 51 80 52.34 55 80 52.41 53 80 52.49 50 
80 52.57 so 
80 52.64 50 80 52.72 50 80 52.79 49 80 52.86 51 80 52.91 52 80 52.98 49 80 53.05 47 80 53.11 46 80 53.18 46 80 53.23 46 80 53.30 47 80 53.37 46 80 53.43 44 80 53.51 45 80 53.58 46 80 53.65 47 80 53.73 48 80 53.80 49 80 53.87 53 80 53.87 47 80 53.85 49 80 53.86 49 80 53.80 50 80 53.65 51 80 53.51 52 
 
K-40 (cpm) 344 377 484 386 204 316 378 513 274 262 228 337 203 244 334 255 315 332 432 251 246 239 260 225 249 263 310 328 204 201 320 252 315 306 211 280 213 137 306 168 217 267 236 217 206 
 
Bi-214 (cpm) 358 374 380 270 109 225 212 200 107 167 185 203 179 130 209 220 275 186 249 140 140 234 224 138 160 180 170 168 164 146 224 173 150 141 183 247 144 172 162 168 198 183 121 234 168 
 
Tl-208 (cpm) 247 133 167 120 152 208 127 160 
86 81 107 295 316 150 107 122 116 212 109 96 137 139 290 107 78 42 93 104 110 160 113 65 59 70 65 65 118 130 63 187 151 103 87 154 96 
 
Total (cpm) 11498 12139 10812 10481 7908 12187 9545 9938 6663 6809 8519 11835 11255 8439 9307 10566 10025 10471 9964 7293 8325 9001 11704 8061 7811 7615 7840 8150 7896 8560 8044 7284 7111 6893 6928 7490 8133 8259 7339 8720 8600 7752 7478 8097 7479 
 
100 
 
 Georgia Site 2 Shipboard Data - Gamma Radiation 
 
Site Time 
540 00:35:40 541 00:37:39 542 00:39:38 543 00:41:38 544 00:43:37 545 00:45:38 546 00:47:39 547 00:49:39 548 00:51:39 549 00:53:38 550 00:55:37 551 00:57:37 552 00:59:36 553 01:01:36 554 01:03:36 
 
Latitude 
31 32.30 31 32.22 31 32.15 31 32.08 31 32.01 31 31.94 31 31.87 31 31.80 31 31.73 31 31.65 31 31.58 31 31.51 31 31.45 31 31.37 31 31.30 
 
Longitude Depth 
(ft) 80 53.37 55 80 53.23 56 80 53.08 57 80 52.94 60 80 52.79 59 80 52.63 55 80 52.49 54 80 52.34 53 80 52.19 54 80 52.04 54 80 51.88 53 80 51.72 52 
ao 51.57 53 
80 51.41 50 80 51.26 49 
 
K-40 (cpm) 367 224 283 183 154 113 252 246 281 252 294 426 317 200 270 
 
Bi-214 (cpm) 196 215 292 123 212 251 166 170 165 149 156 139 218 274 236 
 
Tl-208 (cpm) 111 
99 117 
95 239 324 204 214 
81 101 
72 84 140 193 168 
 
Total (cpm) 8129 7846 9118 7509 10975 12732 10707 9070 7976 7345 7226 7955 9744 11276 11802 
 
101 
 
 APPENDIX3 GAMMA ISOTOPE MAPPING DATA 
TARGET AREA 3 
102 
 
 Nautical ~Ule 
 
eo eo 31 
 
30'N 
 
50'Yf ~------~---------.--------.---------.-------~ 
 
45..., 3P 
 
30'N 
 
3124e'oN 50'Yf 
 
eo 
 
3124'N 45'Yf 
 
S I T E 3 GRAY'S REEF S HI P 'S T RAN SECTS GEORGIA MINERAL SURVEY 
 
103 
 
 Nautical Mile 
 
60 50 vr 
 
aoo 45 vr 
 
31 30~ r-------.-------~------~------~------~ 31 30~ 
 
.., 
 
31 24~ ~------~------~-------L------~------~ 31 24~ 
 
60 50'W 
 
80 45'W' 
 
SITE 3 GRAY'S REEF WATER DEPTH CONTOUR GEORGIA MINERAL SURVEY 
 
104 
 
 ~05 
 
 Nau t 1. c a 1 Mi 1e 
 
3 p 
 
80 
30'No 
 
5~0'W!'._-,r-_~=-r------,---B Oo 
 
45'W 3P 
 
30'N 
 
106 
 
 "f'":-""' 
t) 
 
<t';l-' 
~ 
 
<t7 ~~ 
~';:) 
 
<trJl 
 
c.!) 
 
,..J 
 
0~ 
 
1:'-..lt 
r,i3- 
 
1~~~ 
 
0;- 
cP 
 
too""~ 
~~ ~ 
 
~ct<. .t... 
 
~ 
ll:l 'lf:lr 
0 
c co 
 
"r/lt:J 
-~0 
<t~ 
ct.t:J 
t:) 
C(') 
 
~ ~ 
~ 
(.[) 
 
107 
 
 Nautical Mile 
 
31 
 
80 
30'N 
 
50'\f 
 
80  
 
~------~------~------~------~----~ 
 
45 '\If 
3P 
 
30'N 
 
(' 
 
31 24'N L-------L-------~------~------~----~ 31 24'N 
 
80 50'W 
 
80 45'\f 
 
SITE 3 GRAY~ REEF BI-214 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
108 
 
 ...... 
0 
(0 
8oo 
so 'JJr 
 
o~ 
~\0 ~ 
 
8oo 
<~s 'JJr 
 
nil&'~ 
~\0 ~ 
 
S I T E 3 GRAY'S REEF B i -2 1 4 GAMMA ACT I V I T Y 
GEORGIA MINERAL SURVEY 
 
 Nautical Mile 
 
vr 80 
3130'N 
 
50'W 
 
80 
 
~------~------~------~------~----~ 
 
45 3 p 
 
30'N 
 
3P 24'N 80 50"tf 
 
80 
 
3 45 
 
pvr 
 
24'N 
 
SITE 3 GRAY'S REEF TL-208 GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
110 
 
 -;> 
E-t 
(.) 
< 
<~>-' 
~~ 
<? c.!:)::"> 
COal 
0 
N....l 
..J"I< 
E-4:tzrl; 
tz..- 
~~ 
"<-trJ 
glc.!) 
><--0" 
"~~~ 
C() 
 
 Nautical Mile 
 
vr 80 
3130~ 
 
50 
 
80 
 
~----~------~------~------~------~ 
 
45'W 3 p 
 
30'N 
 
31~24'N ~----~~----~------~------~------~ 3124'N 
 
80 50"tf 
 
80 45'W 
 
SITE 3 GRAY'S REEF TOTAL GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
112 
 
 __.... 
Vl 
Boo~ 
vo 'Jy 
 
Boo 
1s 'Jr 
 
~~ 
0 'l-~ 
ro..., 
 
SITE 3 GRAY'S REEF TOTAL GAMMA ACTIVITY GEORGIA MINERAL SURVEY 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
1 03:12:04 2 03:14:04 3 03:16:04 4 03:18:04 5 03:20:04 6 03:22:04 7 03:24:04 8 03:26:04 9 03:28:04 10 03:30:04 11 03:32:05 12 03:34:05 13 03:36:06 14 03:38:07 15 03:40:07 16 03:42:07 17 03:44:08 18 03:46:08 19 03:48:08 20 03:50:09 21 03:52:09 22 03:54:11 23 03:56:11 24 03:58:12 25 04:00:13 26 04:02:15 27 04:04:16 28 04:06:16 29 04:08:16 30 04:10:17 31 04 ~ 12:16 32 o4 r14:17 33 04~16:17 34 04:18:17 35 04:20:17 36 04:22:17 37 04:24:17 38 04:26:17 39 04:28:17 40 04:30:17 41 04:32:16 42 04:34:16 43 04:36:16 44 04:~8:16 
 
Latitude 
31 27.59 31 27.48 31 27.38 31 27.28 31 27.18 31 27.07 31 26.97 31 26.86 31 26.77 31 26.66 31 26.56 31 26.45 31 26.36 31 26.25 31 26.16 31 26.05 31 25.95 31 25.85 31 25.74 31 25.64 31 25.54 31 25.43 31 25.34 31 25.24 31 25.14 31 25.04 31 24.95 31 24.86 31 24.76 31 24.67 31 24.56 31 24.46 31 24.37 31 24.28 31 24.20 31 24.16 31 24.21 31 24.28 31 24.34 31 24.40 31 24.46 31 24.52 31 24.58 31 24.64 
 
Longitude Depth 
(ft) 80 48.15 56 80 48.10 58 80 48.04 59 80 48.00 57 80 47.95 54 80 47.89 56 80 47.82 61 80 47.74 58 80 47.68 56 80 47.63 53 80 47.60 54 80 47.55 58 80 47.49 58 80 47.42 69 80 47.36 72 80 47.29 73 80 47.23 74 80 47.18 72 80 47.13 73 80 47.08 72 80 47.02 72 80 46.96 70 
80 46.90 71 80 46.85 71 80 46.79 70 80 46.74 71 80 46.68 70 80 46.63 71 80 46.57 70 80 46.51 69 80 46.46 69 80 46.43 68 80 46.36 69 80 46.33 69 80 46.38 68 80 46.45 69 80 46.50 70 80 46.52 70 80 46.55 70 80 46.59 70 80 46.65 70 80 46.68 70 80 46.70 70 80 46.70 70 
 
K-40 (cpm) 188 281 234 276 282 221 204 256 
220 86 
205 184 254 396 384 368 428 314 307 289 195 262 266 216 311 204 237 244 225 253 305 356 179 346 263 233 296 293 225 248 306 245 242 277 
 
Bi-214 (cpm) 
301 279 238 264 309 282 215 270 373 284 454 386 280 247 270 238 246 215 239 278 258 254 374 262 242 207 262 193 213 272 214 230 214 297 214 199 256 246 259 238 227 214 250 207 
 
Tl-208 (cpm) 
66 98 73 94 169 44 98 98 95 179 87 88 51 155 151 125 126 272 288 197 277 402 408 172 225 187 134 121 94 90 109 92 73 106 113 137 143 171 119 132 141 159 154 205 
 
Total (cpm) 9802 8835 8672 9475 10990 9843 9018 9589 10416 11341 11218 10383 9121 10125 9745 9857 10372 11454 12742 10762 11113 13550 14104 10738 10333 9968 9277 9296 9344 9053 9196 9181 8846 9114 8983 9129 9034 8785 8826 9114 9210 9438 9692 10189 
 
114 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
45 04:40:16 46 04:42:16 47 04:44:17 48 04:46:17 49 04:48:18 50 04:50:18 51 04:52:18 52 04:54:19 53 04:56:20 54 04:58:21 55 05:00:22 56 05:02:24 57 05:04:25 58 05:06:25 59 05:08:26 60 05:10:26 61 05:12:26 62 05:14:27 63 05:16:27 64 05:18:27 65 05:20:28 66 05:22:28 67 05:24:28 68 05:26:28 69 05:28:28 70 05:30:28 71 05:32:29 72 05:34:30 73 05:36:31 74 05:38:31 75 05:40:32 76 05:42:32 77 05:44:33 78 05:46:33 79 05:48:32 80 05:50:33 81 05:52:33 82 05:54:34 83 05:56:34 84 05:58:34 85 06:00:33 86 06:02:33 87 06:04:33 88 06:06:33 89 06:08:33 
 
Latitude 
31 24.70 31 24.76 31 24.82 31 24.87 31 24.93 31 24.98 31 25.05 31 25.10 31 25.17 31 25.22 31 25.29 31 25.34 31 25.40 31 25.46 31 25.52 31 25.57 31 25.63 31 25.69 31 25:75 31 25.81 31 25.87 31 25.93 31 25.99 31 26.05 31 26.12 31 26.18 31 26.24 31 26.31 31 26.36 31 26.41 31 26.48 31 26.54 31 26.59 31 26.66 31 26.72 31 26.78 31 26.84 31 26.90 31 26.95 31 27.01 31 27.07 31 27.13 31 27.19 31 27.24 31 27.30 
 
Longitude Depth (ft) 
80 46.73 70 80 46.76 70 80 46.81 71 80 46.85 71 80 46.89 70 80 46.93 70 80 46.96 71 80 47.00 71 80 47.03 73 80 47.06 73 80 47.11 72 80 47.14 71 80 47.18 71 80 47.21 71 80 47.24 72 80 47.28 72 80 47.31 72 80 47.35 72 80 47.39 73 80 47.42 72 80 47.46 72 80 47.49 65 80 47.53 60 80 47.56 60 80 47.61 55 80 47.63 55 80 47.67 57 80 47.71 58 80 47.75 58 80 47.77 59 80 47.81 60 80 47.84 61 80 47.88 59 80 47.92 54 80 47.95 56 80 47.99 57 80 48.03 59 80 48.07 61 80 48.10 62 80 48.13 62 80 48.17 59 80 48.20 57 80 48.24 57 80 48.27 58 80 48.31 58 
 
K-40 (cpm) 271 239 244 304 253 194 273 304 340 263 422 238 258 314 275 358 328 355 341 343 496 326 250 255 205 223 257 311 336 163 238 189 243 214 274 289 353 254 283 286 183 302 196 168 189 
 
Bi-214 (cpm) 202 195 211 236 200 229 389 184 276 200 216 206 145 210 231 191 294 200 269 276 223 248 374 243 449 424 361 294 361 361 204 197 338 218 252 297 286 246 249 266 299 305 300 343 328 
 
Tl-208 (cpm) 200 156 183 214 229 236 381 299 329 271 287 225 173 257 246 161 247 267 194 129 145 
55 87 68 87 130 140 131 129 140 87 42 91 177 124 74 102 73 101 74 113 87 117 57 54 
 
Total (cpm) 10195 9870 9652 10309 11188 12035 13214 12263 12717 11451 11313 10893 9489 10569 11332 9584 11178 11136 9603 10316 10417 8956 10767 10313 11885 11691 11073 10592 10371 9498 8672 8539 9686 10976 9750 9199 8945 8615 8400 8610 9346 10138 10168 9731 10176 
 
115 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
90 06:10:34 91 06:12:34 92 06:14:34 93 06:16:35 94 06:18:36 95 06:20:36 96 06:22:36 97 06:24:37 98 06:26:37 99 06:28:38 100 06:30:40 101 06:32:43 102 06:34:44 103 06:36:45 104 06:38:45 105 06:40:47 106 06:42:47 107 06:44:47 108 06:46:48 109 06:48:49 110 06:50:50 111 06:52:50 112 06:54:51 113 06:56:51 114 06:58:51 115 07:00:51 116 07:02:51 117 07:04:51 118 07:06:52 119 07:08:52 120 07:10:53 121 07:12:54 122 07:14:55 123 07:16:55 124 07:18:55 125 07:20:55 126 07:22:55 127 07:24:55 128 07:26:55 129 07:28:56 130 07:30:56 131 07:32:56 132 07:34:56 133 07:36:56 134 07:38:57 
 
Latitude 
31 27.35 31 27.40 31 27.46 31 27.52 31 27.57 31 27.65 31 27.72 31 27.79 31 27.86 31 27.92 31 27.99 31 28.04 31 28.10 31 28.16 31 28.23 31 28.30 31 28.37 31 28.44 31 28.51 31 28.54 31 28.53 31 28.53 31 28.56 31 28.58 31 28.52 31 28.44 31 28.36 31 28.29 31 28.21 31 28.14 31 28.07 31 27.99 31 27.92 31 27.85 31 27.77 31 27.70 31 27.63 31 27.56 31 27.48 31 27.41 31 27.34 31 27.27 31 27.19 31 27.12 31 27.05 
 
Longitude Depth (ft) 
80 48.34 59 80 48.38 59 80 48.42 59 80 48.45 59 80 48.49 59 80 48.53 58 80 48.58 57 80 48.62 56 80 48.64 57 80 48.68 58 80 48.72 59 80 48.76 60 80 48.80 60 80 48.86 62 80 48.89 58 80 48.91 56 80 48.95 58 80 49.01 58 80 49.03 59 80 48.95 59 80 48.86 59 80 48.77 60 80 48.68 61 80 48.58 62 80 48.53 66 80 48.49 65 80 48.46 61 80 48.41 60 80 48.36 60 80 48.32 60 80 48.28 62 80 48.24 61 80 48.19 61 80 48.15 62 80 48.10 62 80 48.06 61 80 48.02 61 80 47.98 61 80 47.93 62 80 47.88 63 80 47.84 62 80 47.80 60 80 47.76 59 80 47.72 62 80 47.68 64 
 
K-40 (cpm) 165 221 194 254 197 191 169 131 
182 252 189 170 196 296 190 260 219 261 215 239 326 230 294 209 292 229 232 200 120 257 132 255 174 218 279 194 297 216 237 227 232 187 303 186 261 
 
Bi-214 (cpm) 
338 316 303 347 386 316 369 414 416 321 357 363 333 310 265 346 306 310 329 305 297 263 212 375 197 277 296 285 301 292 223 334 288 324 216 305 317 315 294 223 300 323 367 331 293 
 
Tl-208 (cpm) 
60 132 
99 106 
97 110 129 286 288 207 115 140 218 140 
82 140 268 133 
85 65 77 144 105 92 71 
232 189 204 280 142 
90 116 
90 93 99 144 132 102 71 70 111 166 141 53 79 
 
Total (cpm) 10529 10462 10209 9976 10085 10511 12448 14211 15376 12905 11126 10816 12281 10316 9686 11635 11920 10776 10909 10204 9474 9444 9252 9893 8741 10601 11379 11507 12553 10156 9455 9438 9536 9077 9044 9174 9951 9786 9422 8863 9205 10081 10772 10980 9435 
 
116 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
135 07:40:57 136 07:42:58 137 07:44:58 138 07:46:58 139 07:48:58 140 07:50:58 141 07:52:59 142 07:54:59 143 07:57:00 144 07:59:01 145 08:01:01 146 08:03:01 147 08:05:02 148 08:07:02 149 08:09:03 150 08:11:03 151 08:13:03 152 08:15:04 153 08:17:04 154 08:19:05 155 08:21:05 156 08:23:05 157 08:25:06 158 08:27:07 159 08:29:08 160 08:31:08 161 08:33:09 162 08:35:09 163 08:37:09 164 08:39:09 165 08:41:09 166 08:43:09 167 08:45:09 168 08:47:09 169 08:49:09 170 08:51:09 171 08:53:09 172 08:55:09 173 08:57:09 174 08:59:09 175 09:01:09 176 09:03:09 177 09:05:09 178 09:07:10 179 09:09:10 
 
Latitude 
31 26.98 31 26.91 31 26.83 31 26.75 31 26.68 31 26.60 31 26.53 31 26.45 31 26.38 31 26.30 31 26.22 31 26.14 31 26.07 31 25.98 31 25.90 31 25.81 31 25.72 31 25.64 31 25.55 31 25.46 31 25.38 31 25.28 31 25.19 31 25.10 31 25.01 31 24.92 31 24.83 31 24.74 31 24.66 31 24.57 31 24.52 31 24.47 31 24.42 31 24.40 31 24.37 31 24.34 31 24.34 31 24.39 31 24.45 31 24.50 31 24.54 31 24.60 31 24.66 31 24.72 31 24.77 
 
Longitude Depth 
(ft) 80 47.63 65 80 47.59 64 80 47.55 63 80 47.52 63 80 47.48 60 80 47.43 60 80 47.39 60 80 47.34 61 80 47.30 63 80 47.26 64 80 47.21 69 80 47.16 73 80 47.11 76 80 47.06 79 80 47.02 79 80 46.97 77 80 46.92 77 80 46.88 76 80 46.82 76 80 46.76 76 80 46.71 77 80 46.65 76 80 46.60 75 80 46.55 75 80 46.50 75 80 46.44 75 80 46.38 76 80 46.32 75 80 46.27 74 80 46.26 74 80 46.33 74 80 46.41 74 80 46.49 75 80 46.57 74 80 46.65 73 80 46.73 74 80 46.80 74 80 46.81 74 80 46.85 74 80 46.88 73 80 46.92 74 80 46.96 74 80 47.00 73 80 47.03 74 80 47.06 74 
 
K-40 (cpm) 291 167 175 117 195 256 254 223 209 140 418 340 395 346 345 435 381 239 277 363 188 157 276 253 259 253 265 195 188 191 163 286 292 260 283 225 296 270 292 254 217 256 335 302 294 
 
Bi-214 (cpm) 302 283 263 354 322 293 365 358 285 338 311 214 238 179 207 222 186 248 256 197 231 189 314 239 235 259 202 262 293 207 163 183 148 222 215 250 230 278 165 202 205 239 179 325 246 
 
Tl-208 (cpm) 
97 96 74 123 90 100 87 142 88 81 159 160 128 211 186 209 214 189 130 243 318 187 150 188 128 115 172 192 129 114 97 113 105 115 146 114 133 152 181 182 150 142 122 159 205 
 
Total (cpm) 8912 9337 9481 10164 11505 11427 10583 10523 9319 10502 10648 10653 10058 10423 10228 10283 11065 10841 8685 11250 13551 10885 10217 9972 9520 9337 9804 9886 9847 9326 9044 8863 8987 9282 9054 9179 9078 9515 9658 9449 9589 9485 9946 10511 11013 
 
117 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
180 09:11:10 181 09:13:11 182 09:15:11 183 09:17:12 184 09:19:13 185 09:21:14 186 09:23:15 187 09:25:16 188 09:27:17 189 09:29:17 190 09:31:18 191 09:33:18 192 09:35:19 193 09:37:19 194 09:39:20 195 09:41:20 196 09:43:21 197 09:45:22 198 09:47:22 199 09:49:22 200 09:51:22 201 09:53:23 202 09:55:24 203 09:57:24 204 09:59:25 205 10:01:25 206 10:03:25 207 10:05:25 208 10:07:25 209 10:09:26 210 10:11:26 211 10:13:26 212 10:15:26 213 10:17:26 214 10:19:26 215 10:21:27 216 10:23:27 217 10:25:28 218 10:27:28 219 10:29:28 220 10:31:29 221 10:33:30 222 10:35:31 223 10:37:32 224 10:39:35 
 
Latitude 
31 24.83 31 24.88 31 24.94 31 25.00 31 25.06 31 25.12 31 25.17 31 25.23 31 25.30 31 25.36 31 25.42 31 25.48 31 25.55 31 25.62 31 25.69 31 25.75 31 25.82 31 25.89 31 25.95 31 26.02 31 26.10 31 26.15 31 26.22 31 26.28 31 26.35 31 26.43 31 26.51 31 26.60 31 26.69 31 26.76 31 26.83 31 26.92 31 27.01 31 27.09 31 27.18 31 27.26 31 27.33 31 27.42 31 27.51 31 27.59 31 27.67 31 27.74 31 27.82 31 27.90 31 28.00 
 
Longitude Depth (ft) 
80 47.09 73 80 47.13 74 80 47.18 74 80 47.21 75 80 47.24 75 80 47.26 75 80 47.29 75 80 47.33 75 80 47.37 75 80 47.41 75 80 47.46 75 80 47.50 74 80 47.54 75 80 47.57 74 80 47.61 74 80 47.66 76 80 47.70 75 80 47.74 76 80 47.79 78 80 47.83 62 80 47.87 59 80 47.91 59 80 47.94 60 80 47.98 62 80 48.03 62 80 48.09 62 80 48.14 59 80 48.15 55 80 48.20 59 80 48.27 61 80 48.33 62 80 48.38 62 80 48.42 59 80 48.46 59 80 48.52 61 80 48.57 61 80 48.62 64 80 48.66 62 80 48.71 60 80 48.75 61 80 48.81 59 80 48.86 59 80 48.93 58 80 48.97 60 80 48.99 60 
 
K-40 (cpm) 202 260 221 197 222 257 253 303 254 187 220 185 298 143 292 244 259 458 210 238 206 159 288 292 266 211 197 207 244 238 240 196 243 179 179 177 291 196 187 103 194 149 226 153 266 
 
Bi-214 (cpm) 148 240 168 188 246 233 357 198 216 300 163 221 271 231 230 212 182 140 282 406 331 377 230 208 237 292 345 245 236 182 216 266 260 359 318 264 366 444 316 366 444 462 426 350 397 
 
Tl-208 (cpm) 236 322 424 293 268 294 249 249 190 244 225 273 251 223 239 190 169 128 
58 128 127 132 
84 79 58 80 102 89 90 117 39 96 99 129 79 113 55 99 66 134 138 312 134 162 140 
 
Total (cpm) 11342 11982 12834 12091 11045 12025 10457 10313 10657 10929 10987 10639 11440 10837 12019 9431 9240 9453 10151 11703 11222 10101 9491 9293 9083 9995 10633 9241 9270 8996 9330 10852 10537 10182 9601 9326 10965 11423 10865 11662 12675 16031 12293 12347 11038 
 
118 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
225 10:41:36 226 10:43:37 227 10:45:38 228 10:47:38 229 10:49:38 230 10:51:39 231 10:53:39 232 10:55:41 233 10:57:43 234 10:59:43 235 11:01:44 236 11:03:45 237 11:05:45 238 11:07:45 239 11:09:45 240 11:11:45 241 11:13:45 242 11:15:45 243 11:17:46 244 11:19:48 245 11:21:50 246 11:23:51 247 11:25:53 248 11:27:54 249 11:29:54 250 11:31:54 251 11:33:54 252 11:35:54 253 11:37:55 254 11:39:56 255 11:41:56 256 11:43:56 257 11:45:56 258 11:47:56 259 11:49:56 260 11:51:56 261 11:53:57 262 11:55:57 263 11:57:57 264 11:59:57 265 12:01:57 266 12:03:58 267 12:05:58 268 12:07:59 269 12:10:00 
 
Latitude 
31 28.07 31 28.14 31 28.21 31 28.28 31 28.36 31 28.44 31 28.51 31 28.59 31 28.66 31 28.74 31 28.82 31 28.90 31 28.98 31 29.05 31 29.12 31 29.19 31 29.15 31 29.09 31 29.02 31 28.94 31 28.86 31 28.79 31 28.72 31 28.66 31 28.56 31 28.45 31 28.34 31 28.22 31 28.11 31 27.99 31 27.88 31 27.76 31 27.65 31 27.54 31 27.43 31 27.32 31 27.21 31 27.09 31 26.97 31 26.86 31 26.75 31 26.64 31 26.53 31 26.41 31 26.30 
 
Longitude Depth (ft) 
80 49.03 60 80 49.09 60 80 49.13 58 80 49.17 58 80 49.20 57 80 49.23 58 80 49.26 58 
80 49.31 60 80 49.35 60 80 49.38 55 80 49.42 57 80 49.45 58 80 49.48 59 80 49.51 60 80 49.55 60 80 49.50 58 80 49.35 57 80 49.21 58 80 49.06 58 80 48.92 58 80 48.78 57 80 48.65 56 80 48.50 60 80 48.37 67 80 48.27 64 80 48.20 64 80 48.14 63 80 48.08 62 80 48.01 60 80 47.94 62 80 47.88 64 80 47.82 63 80 47.76 62 80 47.69 62 80 47.62 62 80 47.55 63 80 47.49 60 80 47.42 62 80 47.36 64 80 47.29 62 80 47.22 60 80 47.15 58 80 47.08 59 80 47.01 61 80 46.95 61 
 
K-40 (cpm) 270 173 
218 284 200 
97 280 276 157 246 202 245 249 272 318 193 255 102 215 130 215 235 350 286 269 170 193 235 233 291 182 192 264 126 283 267 233 266 278 130 195 115 210 406 431 
 
Bi-214 (cpm) 279 245 318 300 346 305 240 240 333 291 338 167 169 263 251 324 221 388 217 264 390 248 161 175 175 298 321 270 292 268 296 211 286 260 313 261 227 259 346 391 321 259 350 218 267 
 
Tl-208 (cpm) 
80 115 111 130 373 311 155 
66 199 178 106 120 103 110 123 255 247 390 289 243 174 213 101 
89 113 272 154 
92 75 95 64 109 73 96 119 85 86 94 72 101 83 98 73 82 179 
 
Total (cpm) 10052 9780 10140 11212 14951 13755 9470 9754 11707 10201 9488 9156 8159 9677 10099 12325 11762 15054 13484 13382 11523 10861 8143 8516 9335 12263 10929 9592 9305 9274 8762 10126 9413 9213 9902 9672 8856 9641 10258 11217 11094 10964 10341 8095 11249 
 
119 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
270 12:12:00 271 12:14:00 272 12:16:01 273 12:18:01 274 12:20:01 275 12:22:01 276 12:24:01 277 12:26:01 278 12:28:01 279 12:30:03 280 12:32:04 281 12:34:04 282 12:36:04 283 12:38:05 284 12:40:05 285 12:42:06 286 12:44:06 287 12:46:06 288 12:48:06 289 12:50:07 290 12:52:07 291 12:54:07 292 12:56:07 293 12:58:07 294 13:00:07 295 13:02:07 296 13:04:07 297 13:06:07 298 13:08:07 299 13:10:06 300 13:12:06 301 13:14:06 302 13:16:06 303 13:18:06 304 13:20:07 305 13:22:07 306 13:24:07 307 13:26:07 308 13:28:08 309 13:30:08 310 13:32:09 311 13:34:09 312 13:36:09 313 13:38:10 314 13:40:11 
 
Latitude 
31 26.19 31 26.08 31 25.96 31 25.85 31 25.74 31 25.63 31 25.52 31 25.41 31 25.29 31 25.17 31 25.06 31 24.95 31 24.84 31 24.73 31 24.62 31 24.52 31 24.42 31 24.37 31 24.36 31 24.37 31 24.37 31 24.36 31 24.33 31 24.31 31 24.30 31 24.30 31 24.30 31 24.28 31 24.25 31 24.25 31 24.24 31 24.30 31 24.38 31 24.46 31 24.53 31 24.56 31 24.61 31 24.69 31 24.77 31 24.83 31 24.88 31 24.95 31 25.02 31 25.10 31 25.17 
 
Longitude Depth 
(ft) 80 46.89 68 80 46.82 75 80 46.75 76 80 46.69 75 80 46.62 77 80 46.55 76 80 46.49 75 80 46.43 74 80 46.37 74 80 46.30 72 80 46.23 72 80 46.16 72 80 46.09 74 80 46.03 72 80 45.97 71 80 45.88 71 80 45.91 70 80 45.99 70 80 46.07 70 80 46.16 70 80 46.24 69 80 46.34 70 80 46.43 70 80 46.53 70 80 46.62 70 
80 46.71 70 80 46.81 71 80 46.90 69 80 47.00 69 80 47.09 69 80 47.18 68 80 47.20 68 80 47.20 68 80 47.18 68 80 47.21 69 80 47.28 68 80 47.33 68 80 47.36 69 80 47.38 68 80 47.41 69 80 47.48 68 80 47.53 69 80 47.55 69 80 47.56 69 80 47.60 69 
 
K-40 (cpm) 431 369 
364 294 278 342 228 300 287 219 228 335 283 226 207 177 211 246 256 249 213 248 295 312 247 287 221 252 246 231 252 197 136 254 238 253 300 236 267 174 324 309 258 189 207 
 
Bi-214 (cpm) 261 224 249 150 170 245 233 359 247 208 308 205 233 287 262 245 221 264 281 208 251 164 257 211 233 194 205 189 208 252 282 211 179 208 208 222 203 266 274 222 208 195 311 258 200 
 
Tl-208 (cpm) 158 160 128 176 184 152 341 349 205 129 117 128 287 144 119 152 177 112 136 138 105 129 120 131 103 148 
82 120 154 104 175 149 172 219 180 234 261 216 228 230 223 198 144 189 200 
 
Total (cpm) 10115 11232 8979 9363 9197 9615 12692 12402 10179 9171 9335 9897 12101 9807 9343 9289 9030 8992 9273 9249 9116 9088 8954 9260 8992 8834 8636 8823 9173 9345 9696 9737 9944 10015 10077 10251 10649 10068 9843 10450 10695 10530 10009 10192 10608 
 
120 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
315 13:42:11 316 13:44:11 317 13:46:12 318 13:48:12 319 13:50:12 320 13:52:12 321 13:54:12 322 13:56:12 323 13:58:13 324 14:00:14 325 14:02:14 326 14:04:14 327 14:06:14 328 14:08:14 329 14:10:15 330 14:12:16 331 14:14:16 332 14:16:16 333 14:18:16 334 14:20:16 335 14:22:17 336 14:24:18 337 14:26:18 338 14:28:19 339 14:30:19 340 14:32:19 341 14:34:19 342 14:36:20 343 14:38:20 344 14:40:21 345 14:42:21 346 14:44:21 347 14:46:21 348 14:48:22 349 14:50:22 350 14:52:23 351 14:54:23 352 14:56:23 353 14:58:25 354 15:00:26 355 15:02:26 356 15:04:26 357 15:06:27 358 15:08:27 359 15:10:27 
 
Latitude 
31 25.23 31 25.29 31 25.36 31 25.43 31 25.50 31 25.55 31 25.61 31 25.68 31 25.76 31 25.83 31 25.89 31 25.96 31 26.02 31 26.10 31 26.17 31 26.24 31 26.30 31 26.36 31 26.44 31 26.51 31 26.59 31 26.66 31 26.73 31 26.79 31 26.86 31 26.93 31 27.00 31 27.07 31 27.14 31 27.21 31 27.28 31 27.35 31 27.42 31 27.50 31 27.57 31 27.64 31 27.71 31 27.78 31 27.86 31 27.93 31 28.00 31 28.08 31 28.16 31 28.23 31 28.30 
 
Longitude Depth 
(ft) 80 47.66 69 80 47.71 69 80 47.74 68 80 47.76 68 80 47.80 69 80 47.85 68 80 47.90 68 80 47.93 69 80 47.95 70 80 47.98 70 80 48.03 71 80 48.09 71 80 48.12 71 80 48.15 56 80 48.19 56 80 48.22 57 80 48.28 58 80 48.33 57 80 48.37 57 80 48.40 52 80 48.43 52 80 48.45 54 80 48.51 55 80 48.56 56 80 48.61 56 80 48.65 55 80 48.69 54 80 48.73 54 
80 48.78 56 80 48.82 57 80 48.87 58 80 48.92 58 80 48.96 54 80 49.00 60 80 49.05 56 80 49.09 58 80 49.13 59 80 49.19 55 80 49.24 55 80 49.29 57 80 49.34 57 80 49.39 54 80 49.43 54 80 49.48 54 80 49.53 54 
 
K-40 (cpm) 206 307 208 
208 250 213 270 302 353 221 380 279 190 233 218 283 269 204 189 123 200 260 319 164 290 215 212 250 301 256 234 364 226 349 269 238 270 197 234 261 196 224 116 231 177 
 
Bi-214 (cpm) 272 275 
205 219 205 228 245 194 236 235 298 372 301 243 235 300 303 292 341 350 346 301 340 311 356 295 259 304 342 339 329 267 275 284 399 459 378 300 346 231 246 255 263 254 216 
 
Tl-208 (cpm) 209 252 
220 182 203 238 310 161 247 128 126 131 
61 117 
92 94 85 162 64 101 102 100 88 69 144 88 99 113 79 88 170 122 115 65 96 169 217 102 111 84 115 114 107 98 108 
 
Total (cpm) 10299 10305 10364 9000 10125 10914 12060 10199 10302 10347 9506 11103 11085 10339 9657 9291 9448 11050 10892 10125 10920 10572 9811 9503 10200 10502 9683 9909 9415 9843 11744 10134 9832 9669 10388 13072 12652 10134 9895 10331 9410 9457 8821 8913 9884 
 
121 
 
 Georgia Site 3 Shipboard Data - Gamma Radiation 
 
Site Time 
360 15:12:27 361 15:14:27 362 15:16:27 363 15:18:27 364 15:20:27 365 15:22:28 366 15:24:28 367 15:26:28 368 15:28:28 369 15:30:28 370 15:32:29 371 15:34:30 372 15:36:30 373 15:38:31 374 15:40:31 375 15:42:31 376 15:44:31 377 15:46:31 378 15:48:31 379 15:50:32 380 15:52:32 381 15:54:33 382 15:56:33 383 15:58:33 384 16:00:33 385 16:02:34 386 16:04:34 387 16:06:35 388 16:08:35 389 16:10:36 390 16:12:37 391 16:14:38 392 16:16:38 393 16:18:39 394 16:20:39 395 16:22:39 396 16:24:40 397 16:26:40 398 16:28:40 399 16:30:40 400 16:32:40 401 16:34:40 
 
Latitude 
31 28.36 31 28.29 31 28.20 31 28.13 31 28.06 31 28.04 31 28.12 31 28.07 31 27.97 31 27.86 31 27.76 31 27.65 31 27.55 31 27.44 31 27.34 31 27.23 31 27.13 31 27.02 31 26.91 31 26.81 31 26.70 31 26.59 31 26.49 31 26.39 31 26.28 31 26.18 31 26.08 31 25.98 31 25.87 31 25.77 31 25.66 31 25.56 31 25.46 31 25.36 31 25.26 31 25.16 31 25.07 31 24.97 31 24.87 31 24.77 31 24.68 31 24.58 
 
Longitude Depth 
(ft) 80 49.49 54 80 49.42 55 80 49.47 55 80 49.56 54 80 49.65 54 80 49.76 54 80 49.74 55 80 49.65 54 80 49.57 55 80 49.51 56 80 49.43 54 80 49.37 56 80 49.31 56 80 49.25 56 80 49.18 54 80 49.12 56 80 49.05 59 80 48.99 54 80 48.92 55 80 48.86 54 80 48.79 55 80 48.73 56 80 48.67 55 80 48.60 61 80 48.54 56 80 48.48 57 80 48.42 60 80 48.35 73 80 48.28 68 80 48.22 70 80 48.16 69 80 48.10 68 80 48.04 66 80 47.97 67 80 47.91 67 80 47.86 68 80 47.79 67 80 47.73 68 80 47.67 67 80 47.61 68 80 47.55 67 80 47.50 67 
 
K-40 (cpm) 220 247 226 252 236 238 215 260 
86 263 282 317 215 330 263 203 113 191 
66 302 224 305 227 198 268 350 361 302 238 205 243 170 229 225 202 203 200 263 181 167 339 313 
 
Bi-214 
(cpm) 281 247 291 300 241 195 251 269 318 273 256 197 231 259 224 227 227 216 267 249 338 300 296 270 300 192 241 244 257 164 192 170 210 246 274 164 235 243 223 210 188 229 
 
Tl-208 (cpm) 112 112 146 159 
65 151 112 145 254 116 154 114 
90 46 83 123 101 105 76 50 83 78 82 103 151 183 147 270 280 233 210 225 180 201 214 117 141 212 164 157 144 121 
 
Total (cpm) 9471 9376 9645 9952 9029 10416 9616 9607 12808 10009 9948 9184 10224 9249 9551 9853 9960 9544 9979 9448 10073 9345 10844 10982 10653 9732 10741 12456 11547 10747 10339 10424 10248 10539 10431 9731 9671 9857 9801 9918 10042 9676 
 
122 
 
 Nautical Mile 
 
eo eo 31 
 
30'N 
 
50 'W 
~--------~------~~-------.--------~--------~ 
 
45 'W 3 p 
 
30'N 
 
31 2e4o'N so 'W 
 
ao 
 
3 p 45'W' 
 
24'N 
 
SITE 3 GRAY'S REEF SHIP'S TRANSECTS GEORGIA MINERAL SURVEY 
 
123 
 
 APPENDIX4 GAMMA ISOTOPE MAPPING DATA 
TARGET AREA 4 
124 
 
 80 41'W 31 16'N 
.... 
Ic\.n) 
 
Naut leal Klle 
 
8 0 o 3 3 'W 31 16'N 
iN 
 
31 11'N 80 41'W 
 
SITE 4 SHIP~ TRANSECTS GEORGIA MINERALS SURVEY 
 
31 11'N 80 33 'W 
 
 80 41 'W 31 16'N ..-- 
~ 
1\) 
en 
 
Nautical Mile 
 
80 33 'W 31 16'N 
iN 
 
31 11'N 80 41 'W 
 
SITE 4 WATER DEPTH CONTOUR GEORGIA MINERALS SURVEY 
 
,-;::; 
31 11'N 80 33 'W 
 
 127 
 
 80 41 'W 31 16'N 
...... 
1\) (X) 
 
Nautical Mile 
- 
 
80 33 'W 31 16'N 
iN 
 
31 11'N 80 41 'W 
 
SITE 4 K-40 GAMMA ACTIVITY GEORGIA MINERALS SURVEY 
 
31 11'N 80 33 'W 
 
 :>-< 
E-t 
..... :>-< 
;>~ 
......... ;> E-t~ u~ 
<CI.l 
129 
 
 8 oo 41 'W 
31 16'N 
....... 
(.) 
0 
 
Nautical Mile 
 
8 0 o 3 3 'W 31 16'N 
iN 
 
31 11'N 8 0 o 41 'W 
 
SITE 4 BI-214 GAMMA ACTIVITY GEORGIA MINERALS SURVEY 
 
31 11'N 80 33 'W 
 
 '1-' ~ ~ 0 ~ d"l 
~ 
(';) (';) 
0 
0 
~ 
 
-:;:.... 
E-< 
;:::..:;:.... 
-!:il 
Eu-o<:>: <::::> 
rn 
< 
~....:I ~< 
<0:: 
z c.!)!:il -~::-:s 
_C\2 
....I.. < 
I=OC,!) ~0:: 
0 
-~!:il 
E-tc.!) 
Cf) 
 
131 
 
 Sao 41'W 31 16'N 
...... 
(...) I\) 
31 11'N sao 41 'W 
 
Nautical Mile 
 
Sao 3 3 'W 31 16'N 
 
iN 
'~~~ 
~~~ 0'''' 
~ ...____..., /. 
 
SITE 4 TL-208 GAMMA ACTIVITY GEORGIA MINERALS SURVEY 
 
31 11'N sao 33 'W 
 
 1:/' /' 
0 
/' 
<!" 
 
>- 
E-o 
......... 
;>:>-< 
......... ~ 
E-o;> 
uo:: <::::::> 
 
133 
 
 80 41 'W 31 16'N 
...... 
(,.) ~ 
 
Naut leal Mile 
' 
 
80 33 'W 31 16'N 
iN 
 
31 11'N 80 41 'W 
 
SITE 4 TOTAL GAMMA ACTIVITY GEORGIA MINERALS SURVEY 
 
31 11'N 80 33 'W 
 
 ....... 
 
(..) 
 
8oo 
 
()1 
 
<1 1 '1ft 
 
ro~ 
0 \. 
~\. 
 
8oo -:. ua,Jr 
 
\.\.~ 
~ \.0 
 
S IT E 4 T0TAL GAMMA ACT I VI TY GEORGIA MINERAL SURVEY 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
1 18:47:52 2 18:49:51 3 18:51:49 4 18:53:48 5 18:55:48 6 18:57:47 7 18:59:46 8 19:01:44 9 19:03:43 10 19:05:42 11 19:07:41 12 19:09:39 13 19:11:38 14 19:13:37 15 19:15:36 16 19:17:35 17 19:19:34 18 19:21:32 19 19:23:31 20 19:25:30 21 19:27:30 22 19:29:29 23 19:31:28 24 19:33:27 25 19:35:27 26 19:37:26 27 19:39:26 28 19:41:24 29 19:43:23 30 19:45:22 31 19:47:21 32 19:49:20 33 19:51:19 34 19:53:18 35 19:55:17 36 19:57:16 37 19:59:15 38 20:01:14 39 20:03:13 40 20:05:13 41 20:07:12 42 20:09:11 43 20:11:11 44 20:13:10 
 
Latitude 
31 15.06 31 15.00 31 14.94 31 14.88 31 14.83 31 14.77 31 14.75 31 14.71 31 14.67 31 14.63 31 14.58 31 14.54 31 14.50 31 14.47 31 14.42 31 14.39 31 14.34 31 14.30 31 14.27 31 14.23 31 14.18 31 14.15 31 14.11 31 14.07 31 14.04 31 14.00 31 13.96 31 13.92 31 13.89 31 13.84 31 13.81 31 13.76 31 13.73 31 13.68 31 13.64 31 13.60 31 13.56 31 13.51 31 13.46 31 13.43 31 13.38 31 13.34 31 13.29 31 13.25 
 
Longitude Depth (ft) 
80 39.86 67 80 39.80 69 80 39.77 68 80 39.72 67 80 39.67 68 80 39.63 69 80 39.54 70 80 39.44 72 80 39.35 75 80 39.26 76 80 39.16 76 80 39.06 74 80 38.97 72 80 38.87 74 80 38.78 73 80 38.69 76 80 38.59 80 80 38.50 76 80 38.42 70 80 38.32 67 80 38.23 92 80 38.14 90 80 38.04 90 80 37.94 89 80 37.84 90 80 37.74 90 80 37.64 88 80 37.54 84 80 37.45 81 80 37.35 78 80 37.26 78 80 37.16 80 80 37.07 80 80 36.97 78 80 36.87 77 80 36.78 75 80 36.68 80 80 36.58 92 80 36.48 99 80 36.38 97 80 36.27 97 80 36.16 93 80 36.07 89 80 35.97 88 
 
K-40 (cpm) 179 236 179 233 187 225 244 211 265 243 222 248 260 182 187 210 278 269 287 204 209 225 265 181 157 209 195 275 
119 209 100 106 130 
56 120 146 
83 181 248 231 246 303 294 447 
 
Bi-214 (cpm) 115 149 140 156 157 175 163 152 194 128 118 128 100 
80 140 105 
88 95 99 76 155 144 152 112 107 178 144 179 54 55 78 30 115 111 66 94 92 158 59 84 88 151 77 60 
 
Tl-208 (cpm) 
56 50 50 61 58 107 96 74 61 59 47 80 11 94 73 97 58 25 49 63 98 49 97 141 101 129 104 129 60 39 69 130 38 
2 50 86 68 131 54 74 167 264 70 186 
 
Total (cpm) 6555 6238 6087 6433 6852 7385 6998 6561 6517 6255 6109 6172 6124 6494 6744 6283 6386 5976 6140 6499 7579 8054 7233 7659 7441 7619 7810 8599 6530 6198 6684 7273 6842 6345 6491 6598 7210 7486 6878 7008 8301 9711 6850 9740 
 
136 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
 
Latitude Longitude Depth K-40 Bi-214 Tl-208 Total 
 
(ft) (cpm) (cpm) (cpm) 
 
(cpm) 
 
45 20:15:09 
 
31 13.21 80 35.86 87 
 
192 
 
49 
 
58 
 
6156 
 
,, 
 
46 20:17:07 
 
31 13.17 80 35.76 86 
 
188 
 
71 
 
83 
 
6216 
 
47 20:19:07 
 
31 13.13 80 35.65 87 
 
259 
 
62 
 
62 
 
5924 
 
48 20:21:06 
 
31 13.08 80 35.54 89 
 
184 
 
65 
 
149 
 
7670 
 
49 20:23:05 
 
31 13.04 80 35.44 92 
 
244 
 
94 
 
194 
 
8413 
 
so 20:25:05 
 
31 12.99 80 35.33 92 
 
198 
 
65 
 
163 
 
7297 
 
51 20:27:04 
 
31 12.95 80 35.23 89 
 
315 
 
120 
 
266 
 
8665 
 
52 20:29:03 
 
31 12.90 80 35.12 88 
 
331 
 
106 
 
217 
 
7875 
 
53 20:31:02 
 
31 12.85 80 35.01 87 
 
364 
 
68 
 
209 
 
7566 
 
54 20:33:02 
 
31 12.80 80 34.90 87 
 
248 
 
94 
 
119 
 
7534 
 
55 20:35:01 
 
31 12.76 80 34.79 92 
 
359 
 
72 
 
179 
 
8042 
 
56 20:36:59 
 
31 12.72 80 34.69 95 
 
269 
 
82 
 
98 
 
7048 
 
57 20:38:58 
 
31 12.67 80 34.57 96 
 
283 
 
54 
 
76 
 
5882 
 
58 20:40:57 
 
31 12.63 80 34.46 96 
 
345 
 
70 
 
97 
 
5921 
 
59 20:42:55 
 
31 12.58 80 34.35 94 
 
219 
 
105 
 
96 
 
6125 
 
60 20:44:54 
 
31 12.54 80 34.25 91 
 
283 
 
45 
 
106 
 
6095 
 
61 20:46:53 
 
31 12.49 80 34.14 88 
 
234 
 
92 
 
88 
 
5933 
 
62 20:48:52 
 
31 12.44 80 34.03 87 
 
269 
 
101 
 
99 
 
6548 
 
63 20:50:51 
 
31 12.40 80 33.92 85 
 
265 
 
55 
 
162 
 
7034 
 
64 20:52:50 
 
31 12.35 80 33.81 87 
 
200 
 
72 
 
104 
 
6708 
 
65 20:54:49 
 
31 12.31 80 33.70 90 
 
228 
 
21 
 
159 
 
7755 
 
66 20:56:47 
 
31 12.26 80 33.59 98 
 
228 
 
33 
 
105 
 
6372 
 
67 20:58:46 
 
31 12.22 80 33.47 102 
 
285 
 
40 
 
56 
 
5481 
 
68 21:00:44 
 
31 12.15 80 33.40 103 
 
377 
 
21 
 
52 
 
5391 
 
69 21:02:43 
 
31 12.09 80 33.46 103 
 
337 
 
88 
 
97 
 
5680 
 
70 21:04:42 
 
31 12.07 80 33.55 102 
 
354 
 
95 
 
143 
 
5889 
 
71 21:06:40 
 
31 12.05 80 33.66 100 
 
224 
 
59 
 
92 
 
5632 
 
72 21:08:38 
 
31 12.11 80 33.74 95 
 
238 
 
44 
 
71 
 
5593 
 
73 21:10:37 
 
31 12.17 80 33.84 88 
 
277 
 
0 
 
50 
 
5132 
 
74 21:12:35 
 
31 12.21 80 33.94 86 
 
151 
 
24 
 
28 
 
5160 
 
75 21:14:34 
 
31 12.25 80 34.03 87 
 
212 
 
29 
 
94 
 
6027 
 
76 21:16:34 
 
31 12.28 80 34.14 91 
 
168 
 
37 
 
130 
 
6802 
 
77 21:18:32 
 
31 12.33 80 34.24 93 
 
158 
 
68 
 
156 
 
7498 
 
78 21:20:32 
 
31 12.37 80 34.34 95 
 
258 
 
93 
 
126 
 
6674 
 
79 21:22:31 
 
31 12.41 80 34.43 95 
 
171 
 
22 
 
165 
 
7542 
 
80 21:24:29 
 
31 12.45 80 34.53 93 
 
204 
 
58 
 
105 
 
6343 
 
81 21:26:28 
 
31 12.50 80 34.62 88 
 
243 
 
122 
 
100 
 
5748 
 
82 21:28:26 
 
31 12.54 80 34.71 86 
 
266 
 
61 
 
67 
 
5951 
 
83 21:30:25 
 
31 12.59 80 34.81 86 
 
251 
 
48 
 
106 
 
5901 
 
84 21:32:24 
 
31 12.62 80 34.90 88 
 
317 
 
21 
 
61 
 
5971 
 
85 21:34:22 
 
31 12.66 80 35.00 90 
 
329 
 
71 
 
74 
 
5745 
 
86 21:36:21 
 
31 12.69 80 35.09 91 
 
293 
 
25 
 
71 
 
5704 
 
87 21:38:20 
 
31 12.74 80 35.17 90 
 
346 
 
66 
 
92 
 
6481 
 
88 21:40:20 
 
31 12.78 80 35.26 89 
 
374 
 
78 
 
148 
 
7881 
 
89 21:42:19 
 
31 12.82 80 35.35 87 
 
223 
 
36 
 
214 
 
8090 
 
137 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
site Time 
90 21:44:18 91 21:46:17 92 21:48:16 93 21:50:15 94 21:52:14 95 21:54:13 96 21:56:12 97 21:58:11 98 22:00:10 99 22:02:09 100 22:04:08 101 22:06:08 102 22:08:07 103 22:10:07 104 22:12:06 105 22:14:06 106 22:16:06 107 22:18:04 108 22:20:04 109 22:22:03 110 22:24:02 111 22:26:02 112 22:28:01 113 22:30:00 114 22:31:59 115 22:33:58 116 22:35:57 117 22:37:56 118 22:39:55 119 22:41:55 120 22:43:54 121 22:45:53 122 22:47:52 123 22:49:51 124 22:51:50 125 22:53:49 126 22:55:49 127 22:57:48 128 22:59:47 129 23:01:46 130 23:03:45 131 23:05:44 132 23:07:43 133 23:09:41 134 23:11:41 
 
Latitude 
31 12.85 31 12.88 31 12.93 31 12.97 31 13.00 31 13.04 31 13.08 31 13.12 31 13.16 31 13.19 31 13.23 31 13.28 31 13.31 31 13.35 31 13.39 31 13.43 31 13.47 31 13.51 31 13.55 31 13.58 31 13.62 31 13.66 31 13.70 31 13.73 31 13.77 31 13.82 31 13.85 31 13.89 31 13.92 31 13.96 31 13.99 31 14.03 31 14.05 31 14.08 31 14.12 31 14.15 31 14.18 31 14.22 31 14.26 31 14.29 31 14.31 31 14.35 31 14.38 31 14.42 31 14.45 
 
Longitude Depth 
(ft) 80 35.46 86 80 35.55 86 80 35.63 87 80 35.72 86 80 35.80 86 80 35.90 87 80 35.99 93 80 36.07 95 80 36.17 96 80 36.26 94 80 36.35 95 80 36.43 98 80 36.53 92 80 36.62 79 80 36.71 76 80 36.79 76 80 36.88 78 80 36.98 77 80 37.07 76 80 37.15 78 80 37.24 81 80 37.33 83 80 37.41 87 80 37.49 89 80 37.57 89 
80 37.65 88 80 37.72 89 80 37.81 90 80 37.89 89 80 37.98 92 80 38.06 81 80 38.15 72 80 38.23 72 80 38.32 75 80 38.40 79 80 38.49 77 80 38.57 73 80 38.65 75 80 38.74 73 80 38.82 74 80 38.91 75 80 38.99 77 80 39.08 78 80 39.14 79 80 39.22 79 
 
K-40 
(cpm) 316 305 224 209 243 309 272 262 309 243 260 214 310 401 384 394 382 338 296 199 198 97 
190 136 137 236 156 173 198 
74 229 314 185 182 105 235 256 157 183 157 208 206 216 245 195 
 
Bi-214 
(cpm) 54 75 83 63 91 34 29 55 80 58 61 48 59 
112 81 98 90 
125 84 
121 180 167 
91 119 117 
125 68 70 
100 86 99 
104 127 131 
95 159 127 178 155 
84 97 
as 
66 87 128 
 
Tl-208 (cpm) 
205 210 236 181 152 114 137 106 
53 78 123 101 186 96 126 191 200 118 60 50 127 177 88 156 212 95 123 28 77 96 153 118 110 77 
82 62 78 204 139 36 89 20 56 93 56 
 
Total (cpm) 7566 7928 7505 6888 6824 6978 6802 6272 5900 6242 6511 6539 8124 8732 7341 8641 9099 7598 5941 6530 8074 8203 7424 7361 7755 7036 6420 6089 6535 7656 8166 7383 7238 7489 7549 7230 6596 9305 7870 6494 6533 6190 6478 6285 6353 
 
138 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
135 23:13:39 136 23:15:38 137 23:17:37 138 23:19:36 139 23:21:34 140 23:23:33 141 23:25:32 142 23:27:31 143 23:29:30 144 23:31:28 145 23:33:27 146 23:35:26 147 23:37:25 148 23:39:23 149 23:41:24 150 23:43:25 151 23:45:24 152 23:47:24 153 23:49:22 154 23:51:21 155 23:53:20 156 23:55:19 157 23:57:18 158 23:59:16 159 00:01:15 160 00:03:14 161 00:05:13 162 00:07:12 163 00:09:11 164 00:11:10 165 00:13:09 166 00:15:07 167 00:17:06 168 00:19:05 169 00:21:04 170 00:23:02 171 00:25:02 172 00:27:01 173 00:29:00 174 00:30:59 175 00:32:58 176 00:34:57 177 00:36:56 178 00:38:55 179 00:40:54 
 
Latitude 
31 14.48 31 14.52 31 14.54 31 14.57 31 14.60 31 14.66 31 14.72 31 14.75 31 14.67 31 14.59 31 14.52 31 14.46 31 14.40 31 14.33 31 14.25 31 14.23 31 14.31 31 14.40 31 14.48 31 14.56 31 14.64 31 14.74 31 14.83 31 14.92 31 14.94 31 14.93 31 15.00 31 14.96 31 14.86 31 14.81 31 14.75 31 14.68 31 14.61 31 14.54 31 14.47 31 14.41 31 14.34 31 14.28 31 14.21 31 14.14 31 14.07 31 13.99 31 13.92 31 13.86 31 13.80 
 
Longitude Depth (ft) 
80 39.29 75 80 39.36 71 80 39.44 69 80 39.51 68 80 39.58 69 80 39.64 71 80 39.68 71 80 39.74 85 80 39.76 74 80 39.79 72 80 39.84 70 80 39.89 69 80 39.92 68 80 39.96 67 80 40.00 69 80 40.05 68 80 40.00 68 80 39.92 68 80 39.80 69 80 39.69 73 80 39.59 76 80 39.50 76 80 39.41 74 80 39.37 72 80 39.42 75 80 39.47 74 80 39.40 72 80 39.24 93 80 39.14 93 80 38.99 90 80 38.84 88 80 38.69 82 80 38.54 78 80 38.39 81 80 38.23 80 80 38.08 79 80 37.93 79 80 37.77 78 80 37.63 72 80 37.48 89 80 37.34 88 80 37.20 88 80 37.05 88 80 36.90 87 80 36.73 93 
 
K-40 (cpm) 226 201 253 245 115 223 168 171 281 251 123 161 242 224 194 203 242 215 227 225 189 216 223 156 155 245 199 123 165 189 271 202 161 153 
71 89 
0 151 160 185 223 101 143 207 199 
 
Bi-214 (cpm) 182 134 
80 130 
17 43 59 89 147 134 113 125 145 78 62 239 249 270 125 122 60 118 163 156 152 175 156 168 107 147 176 100 102 76 24 59 
0 162 
50 132 161 
35 81 80 105 
 
Tl-208 (cpm) 
95 1 
62 42 
7 35 27 65 52 43 43 71 86 62 23 203 284 151 114 48 
9 50 49 40 37 54 50 71 49 45 67 37 61 59 58 15 16 78 74 73 88 
0 79 66 41 
 
Total (cpm) 7323 6351 6086 6031 5842 6044 6197 6183 6427 6182 6101 6186 6162 6051 5825 11174 11320 9179 7910 5739 5992 6166 6285 6320 6403 6513 6655 6761 6680 6555 6235 6058 6103 6218 6153 6131 6799 7359 7296 7548 7091 6495 6637 7409 6527 
 
139 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
site Time 
180 00:42:53 181 00:44:52 182 00:46:51 183 00:48:50 184 00:50:49 185 00:52:48 186 00:54:46 187 00:56:45 188 00:58:45 189 01:00:45 190 01:02:44 191 01:04:44 192 01:06:43 193 01:08:42 194 01:10:40 195 01:12:38 196 01:14:36 197 01:16:35 198 01:18:34 199 01:20:33 200 01:22:32 201 01.:24:29 202 01:26:28 203 01:30:21 204 01:32:20 205 01:34:19 206 01:36:18 207 01:38:16 208 01:40:15 209 01:42:14 210 01:44:12 211 01:46:11 212 01:48:09 213 01:50:08 214 01:52:06 215 01:54:05 216 01:56:04 217 01:58:03 218 02:00:02 219 02:02:01 220 02:04:00 221 02:05:59 222 02:07:57 223 02:09:56 224 02:11:55 
 
Latitude 
31 13.74 31 13.67 31 13.60 31 13.52 31 13.46 31 13.39 31 13.34 31 13.27 31 13.19 31 13.13 31 13.05 31 12.99 31 12.93 31 12.86 31 12.78 31 12.72 31 12.66 31 12.59 31 12.53 31 12.45 31 12.39 31 12.32 31 12.22 31 12.14 31 12.06 31 11.92 31 11.86 31 11.80 31 11.76 31 11.79 31 11.86 31 11.89 31 11.93 31 11.96 31 11.99 31 12.02 31 12.05 31 12.07 31 12.11 31 12.13 31 12.14 31 12.17 31 12.21 31 12.24 31 12.27 
 
Longitude Depth 
(ft) 80 36.57 93 80 36.42 84 80 36.27 89 80 36.10 91 80 35.95 96 80 35.79 94 80 35.64 87 80 35.48 83 80 35.32 83 80 35.17 91 80 35.02 96 80 34.85 100 80 34.70 100 80 34.55 98 80 34.39 97 80 34.26 99 80 34.10 97 80 33.94 97 80 33.79 97 80 33.64 95 80 33.47 94 80 33.32 94 80 33.28 93 80 33.32 90 80 33.37 86 80 33.46 84 80 33.53 81 80 33.59 81 80 33.65 82 80 33.71 81 80 33.75 82 80 33.82 82 80 33.88 80 80 33.94 81 80 34.02 83 80 34.08 85 80 34.15 87 80 34.20 88 80 34.27 90 80 34.33 90 80 34.40 89 80 34.47 89 80 34.52 86 80 34.58 83 80 34.66 80 
 
K-40 
(cpm) 129 
75 126 159 182 247 161 145 260 169 175 278 274 101 229 172 
82 145 
72 123 149 152 
97 168 237 261 246 199 294 259 188 258 314 234 241 228 271 238 197 284 163 298 192 272 189 
 
Bi-214 (cpm) 
65 75 109 96 84 74 44 
0 100 
95 57 21 17 61 63 43 
4 29 
0 35 26 20 21 46 109 45 108 60 80 30 71 38 16 63 49 43 
2 81 55 48 74 73 84 80 141 
 
Tl-208 (cpm) 
45 49 16 40 40 69 16 29 90 168 139 144 123 29 116 50 20 44 
9 126 162 
32 11 76 28 56 37 87 72 109 67 83 35 64 75 68 95 121 134 117 83 142 105 95 119 
 
Total 
(cpm) 6499 7560 6606 7024 6375 6139 6709 5738 6969 10546 9103 8021 7507 8125 6562 5474 3296 4270 6318 6669 7511 5598 3286 4881 6136 6342 6450 6233 6566 6337 5957 5569 5463 5229 5083 5143 6110 7102 7283 7082 6868 6401 6215 6625 6746 
 
140 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
225 02:13:54 226 02:15:52 227 02:17:51 228 02:19:50 229 02:21:49 230 02:23:47 231 02:25:46 232 02:27:45 233 02:29:44 234 02:31:43 235 02:33:43 236 02:35:43 237 02:37:42 238 02:39:41 239 02:41:40 240 02:43:38 241 02:45:37 242 02:47:36 243 02:49:35 244 02:51:34 245 02:53:32 246 02:55:31 247 02:57:30 248 02:59:28 249 03:01:27 250 03:03:26 251 03:05:25 252 03:07:25 253 03:09:25 254 03:11:24 255 03:13:24 256 03:15:24 257 03:17:24 258 03:19:22 259 03:21:21 260 03:23:20 261 03:25:19 262 03:27:18 263 03:29:17 264 03:31:16 265 03:33:15 266 03:35:14 267 03:37:13 268 03:39:12 269 03:41:11 
 
Latitude 
31 12.28 31 12.31 31 12.36 31 12.38 31 12.39 31 12.40 31 12.45 31 12.51 31 12.52 31 12.51 31 12.55 31 12.62 31 12.66 31 12.65 31 12.66 31 12.71 31 12.79 31 12.81 31 12.79 31 12.80 31 12.86 31 12.93 31 12.98 31 13.01 31 13.03 31 13.07 31 13.10 31 13.14 31 13.18 31 13.23 31 13.26 31 13.29 31 13.33 31 13.37 31 13.41 31 13.44 31 13.48 31 13.52 31 13.56 31 13.59 31 13.62 31 13.65 31 13.69 31 13.75 31 13.79 
 
Longitude Depth (ft) 
80 34.73 81 80 34.79 81 80 34.85 83 80 34.92 86 80 35.01 85 80 35.08 86 80 35.14 84 80 35.19 83 80 35.27 81 80 35.36 79 80 35.42 79 80 35.46 81 80 35.53 82 80 35.62 82 80 35.70 81 80 35.75 80 80 35.78 83 80 35.86 90 80 35.95 90 80 36.04 88 80 36.09 91 80 36.12 90 80 36.21 92 80 36.29 88 80 36.38 83 80 36.46 75 80 36.55 72 80 36.64 71 80 36.72 71 80 36.80 73 80 36.89 74 80 36.99 76 80 37.09 78 80 37.17 78 80 37.26 79 80 37.35 80 80 37.45 80 80 37.54 81 80 37.62 82 80 37.71 85 80 37.81 73 80 37.91 72 80 38.00 70 80 38.08 70 80 38.17 73 
 
K-40 (cpm) 245 282 275 214 286 360 296 302 146 312 203 308 205 321 252 195 315 299 215 241 252 163 279 268 180 230 236 257 448 558 356 347 362 396 272 209 215 205 228 195 158 287 234 173 254 
 
Bi-214 (cpm) 
91 59 74 33 85 46 58 60 73 52 71 11 97 89 57 51 51 88 66 12 11 59 79 54 83 60 74 93 131 151 71 79 80 121 120 118 77 89 132 125 137 80 81 126 112 
 
Tl-208 (cpm) 
68 49 77 99 120 119 66 47 75 110 174 250 172 125 134 124 76 128 43 114 172 95 116 49 68 103 163 148 274 363 100 211 237 242 84 44 53 101 124 88 107 62 81 110 137 
 
Total (cpm) 5926 5736 5460 5710 6337 6455 6393 5919 5677 6375 7432 8556 7589 6919 6547 6353 6060 6153 6335 6448 6484 6629 6004 5646 5587 6126 7091 6923 9840 11327 7000 8502 9369 9772 6328 5772 6425 6950 7052 6412 6389 6443 6617 6963 7542 
 
141 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
270 03:43:10 271 03:45:10 272 03:47:10 273 03:49:09 274 03:51:08 275 03:53:07 276 03:55:06 277 03:57:05 278 03:59:05 279 04:01:04 280 04:03:03 281 04:05:02 282 04:07:01 283 04:09:00 284 04:10:59 285 04:12:58 286 04:14:57 287 04:16:56 288 04:18:55 289 04:20:56 290 04:22:56 291 04:24:56 292 04:26:55 293 04:28:55 294 04:30:54 295 04:32:52 296 04:34:51 297 04:36:51 298 04:38:50 299 04:40:50 300 04:42:49 301 04:44:48 302 04:46:47 303 04:48:46 304 04:50:45 305 04:52:44 306 04:54:42 307 04:56:41 308 04:58:40 309 05:00:39 310 05:02:38 311 05:04:37 312 05:06:36 313 05:08:35 314 05:10:33 
 
Latitude 
31 13.81 31 13.84 31 13.90 31 13.97 31 13.98 31 13.99 31 14.04 31 14.12 31 14.16 31 14.18 31 14.19 31 14.22 31 14.27 31 14.33 31 14.38 31 14.41 31 14.44 31 14.37 31 14.25 31 14.15 31 14.10 31 14.06 31 14.00 31 13.95 31 13.90 31 13.86 31 13.81 31 13.77 31 13.72 31 13.68 31 13.63 31 13.59 31 13.55 31 13.51 31 13.48 31 13.44 31 13.41 31 13.37 31 13.34 31 13.30 31 13.26 31 13.23 31 13.20 31 13.17 31 13.13 
 
Longitude Depth (ft) 
80 38.28 72 80 38.39 73 80 38.46 78 80 38.53 74 80 38.65 72 80 38.76 76 80 38.84 79 80 38.90 73 80 38.99 83 80 39.10 78 80 39.21 76 80 39.31 71 80 39.40 74 80 39.49 71 80 39.59 70 80 39.70 77 80 39.81 76 80 39.87 76 80 39.88 78 80 39.86 80 80 39.74 80 80 39.63 81 80 39.51 81 80 39.39 81 80 39.27 79 80 39.15 79 80 39.04 78 80 38.93 77 80 38.82 74 80 38.70 71 80 38.60 71 80 38.51 72 80 38.41 72 80 38.32 74 80 38.23 84 80 38.14 85 80 38.05 88 80 37.96 90 80 37.87 92 80 37.78 90 80 37.70 87 80 37.61 90 80 37.52 90 80 37.43 85 80 37.35 83 
 
K-40 (cpm) 168 231 136 286 246 
179 194 172 175 176 259 240 201 275 265 264 214 276 294 161 143 184 159 150 192 253 217 204 177 124 239 176 161 242 104 193 208 224 281 171 178 202 153 117 226 
 
Bi-214 (cpm) 112 178 
166 164 190 
91 83 151 138 191 124 126 63 122 155 132 136 151 104 227 93 192 156 150 162 115 97 128 172 80 109 122 180 139 128 92 128 101 77 100 122 177 122 102 130 
 
Tl-208 (cpm) 176 133 190 157 151 
77 45 86 74 283 52 46 116 47 109 109 115 72 34 167 187 308 85 117 90 68 51 75 195 75 157 124 182 112 140 60 100 52 102 129 59 80 122 148 38 
 
Total (cpm) 7640 7691 8808 9132 8175 6538 6523 7068 7770 9649 6478 6460 6532 6451 6821 7362 7388 7044 5944 9255 10524 10567 9021 7529 7540 6606 6418 6829 8764 6592 8591 7118 7346 7206 7538 6561 5984 5868 6267 6833 6609 6520 6610 6972 6420 
 
142 
 
 Georgia Site 4 Shipboard Data - Gamma Radiation 
 
Site Time 
315 05:12:32 316 05:14:31 317 05:16:31 318 05:18:32 319 05:20:32 320 05:22:31 321 05:24:29 322 05:26:29 323 05:28:29 324 05:30:28 325 05:32:28 326 05:34:28 
 
Latitude 
31 13.10 31 13.06 31 13.02 31 12.98 31 12.94 31 12.92 31 12.88 31 12.84 31 12.81 31 12.78 31 12.75 31 12.71 
 
Longitude Depth 
(ft) 80 37.27 84 80 37.19 84 80 37.10 82 80 37.01 80 80 36.92 80 80 36.83 81 80 36.75 83 80 36.66 86 80 36.57 86 80 36.49 86 80 36.40 84 80 36.32 81 
 
K-40 (cpm) 168 188 250 383 442 233 303 376 579 216 297 186 
 
Bi-214 (cpm) 112 
39 132 164 185 
75 51 35 116 77 36 58 
 
Tl-208 (cpm) 
60 70 83 205 338 171 103 94 254 244 113 45 
 
Total 
(cpm) 5668 6280 6178 10708 11485 10069 6994 6834 10034 9347 6571 5448 
 
143 
 
  Table 2. RESULTS OF GAMMA ISOTOPE MAPPING IN TARGET AREAS AND DRILL SITES See Figure 1 and Appendices 1-4. Gamma activity is in counts per minute (cpm) 
 
TARGET AREA TAl (Fig . 21 ,App.l) 
TA2 (Fig. 22 ,App. 2) 
(Fig. 23) (Fig. 24) (Fig. 25) 
,TA3 (Fig.26,App.3) (Fig. 27) (Fig. 28) (Fig. 29) (Fig. 30) (Fig. 32) 
TA4 (Fig.34,App.4) (Fig. 35) 
 
DRILL SITE 
- 
TA1/1/97 TA1/5/212 
TA1/6/288 
 
FEATURE 
- 
layered sediments layered sediments 
above small channel layered sediments 
 
Maxjsite K40 Min/site 
787/25-155/223 286 454 
552 
 
Bi214 
422/213-11/102 68 
217 
238 
 
Tl208 
430/287-8/96 71 
216 
251 
 
TOTAL 
15460/287-5333/278 6450 
11615 
12789 
 
- 
TA2/2/114 
TA2/4/215 
TA2/6/278 TA2/8/390 TA2/9/464 
 
- 
layered sediments above wide shallow channel 
layered sediments above wide shallow channel 
outcropping channel deposits 
edge of outcropping channel deposits 
layered sediments above small channel 
 
647/82-113/545 263 
129 
489 218 318 
 
423/390-37/6 67 
391 
270 423 337 
 
521/219-26/114 15901/215-5956/10 
 
26 
 
6173 
 
510 
 
15901 
 
159 
 
11764 
 
249 
 
13432 
 
399 
 
14481 
 
- 
TA3/2/98 
TA3/4/182 TA3/4/197 TA3/4/198 TA3/6/335 
 
- 
layered sediments above large channel 
layered sediments toe of sandwave crest of sandwave layered sediments 
 
496/65-66/378 182 
221 458 210 200 
 
462/221-140/197 416 
168 140 282 346 
 
424/182-42/76 288 
424 128 
58 102 
 
15376/98-8095/268 15376 
12834 9453 
10151 10920 
 
- 
TM/1/26 TA4/4/254 
 
- 
layered sediments between sandwaves 
layered sediments between sandwaves 
 
579/323-0/171 209 
558 
 
270/152-0/171 178 
151 
 
363/254-0/176 11485/319-3286/202 
 
129 
 
7619 
 
363 
 
11327 
 
-------- - 
 
 TABLE 3. GROSS TEXTURE/MINERALOGY OF TARGET AREAS VIBRALIFT SAMPLES NOTE: Petrographic analyses carried out by Jack Reynolds, E.I. DuPont de Nemours Co., Trail Ridge FL 
and Jim Herring, u.s. Geological Survey, Denver Federal Center 
 
DRILL SITE 
TA 1/1/97 (Fig. 21) 
 
SAMPLE DEPTH (ft) 
0-5 5-10 10-15 15-20 
 
GROSS TEXTURE 
f-m sd vf-f sd vf-f sd, minor cl, shell f-m sd, oxidized 
 
%HM 
 
% SLIME % Ti02 
 
% Zr02 
 
COMMENTS 
layered sediments low to moderate gamma 
activity 
 
TA 1/5/212 (Fig. 21) 
 
0-5 5-10 
10-15 15-20 
 
vf-f sd, minor cl shelly mud mud, minor sd f-m sd, minor sh 
 
TA 1/6/288 (Fig. 21) 
TA 2/2/114 (Fig. 22) 
TA 2/4/215 (Fig. 22) 
 
0-5 5-10 10-15 15-20 
0-5 5-10 10-15 15-20 
0-5 5-10 10-15 15-20 
 
f-vf sd f-vf sd, minor sh shelly f-vf sd f-vf sd, minor sh 
f-m sd, minor sh f-m sd, some sh shelly f-m sd v. shelly f-m sd 
shelly f-m sd sdy mud mud no sample 
 
1.51 0.94 0.93 0.42 
 
2.70 8.39 10.95 8.86 
 
9.14 9.28 15.86 17.62 
 
0.27 37.19 0.84 19.76 
 
5.79 12.86 
 
1.87 2.52 4.35 4.16 
0.61 1. 62 
 
layered sediments above small channel 
moderate K40, Bi214 and Tl208 activity 
moderate to high total activity 
low percent heavy minerals 
channel probably not cored 
layered sediments above medium channel 
moderate gamma activity channel probably not 
cored 
layered sediments above wide shallow channel 
low gamma activity 
layered sediments above wide channel 
Low K40 activity; high Bi214, Tl208 and very low percent heavy minerals 
 
- --- . ----- - ~- 
 
... 
 
 DRILL SITE 
 
SAMPLE DEPTH (ft) 
 
TA 2/6/278 (Figs. 22, 23) 
 
0-5 5-10 10-15 15-20 
 
TA 2/8/390 (Figs. 22, 24) 
 
0-5 5-10 10-15 15-20 
 
TA 2/9/464 (Figs. 22. 25) 
TA 3/2/98 (Figs. 26, 27) 
 
0-5 5-10 10-15 15-20 
0-5 5-10 10-15 15-20 
 
TABLE 3 CONTINUED 
 
GROSS TEXTURE 
mud, minor sd, sh shelly, sandy mud muddy sd and sh no sample 
shelly f-m sd shelly f-m sd shelly f-m sd f-m sd 
 
% HM % SLIME 
 
f-m sd f-m sd f-m sd f-m sd, minor cl 
f-m sd f-m sd vf-f sd, minor cl, sh vf-f sd, minor cl, sh 
 
% Ti02 
 
% Zr02 
 
TA 3/4/182 (Figs. 26, 28) 
TA 3/4/197 (Figs. 26, 29) 
TA 3/4/198 (Figs. 26, 30) 
 
0-5 5-10 10-15 15-20 
0-5 5-10 10-15 15-20 
0-5 5-10 10-15 15-20 
 
shelly f-m sd shelly f-m sd, oxidized shelly f-m sd f-m sd, oxidized 
f-m sd, minor sh f-m sd, minor sh shelly f-m sd shelly f-c sd 
shelly f-m sd shelly f-m sd shelly f-m sd shelly f-m sd 
 
CO:MMENTS 
outcropping muddy channel deposits 
moderate to high K40 activity 
edge of outcropping sandy channel deposits 
low K40 activity high Bi214 activity 
layered sediments above small channel 
moderate to high gamma activity 
layered sediments above large channel 
low K40, high Bi214 and total gamma activity 
channel probably not cored 
layered sediments high Tl208 activity 
toe of sandwave high K40 activity (?) low Bi214, Tl208, total 
activity 
crest of sandwave low Tl208 activity 
 
 DRILL SITE 
 
SAMPLE DEPTH (ft) 
 
TA 3/6/335 (Figs. 26, 32) 
 
0-5 5-10 10-15 15-20 
 
GROSS TEXTURE 
f-md sd f-md sd shelly f-m sd shelly f-m sd 
 
TABLE 3 CONTINUED 
 
%HM 
0.65 0.69 0.43 0.85 
 
% SLIME 
0.65 1.21 1. 63 1. 78 
 
% Tio2 
10.31 7.80 6.44 7.37 
 
% zro2 
3.10 1.57 1. 33 2.06 
 
TA 4/1/26 (Fig. 35) 
TA 4/4/254 
 
0-5 5-10 10-15 15-20 
0-5 5-10 
10-15 15-20 
 
shelly f-m sd shelly f-m sd shelly f-m sd shelly f-m sd 
shelly f-m sd dense clay with m sand 
and organic matter f-m sd, oxidized f-m sd, oxidized 
 
0.20 0.31 
0.36 0.35 
 
2.21 6.44 
6.08 5.02 
 
8.85 7.97 
22.16 18.68 
 
1. 60 2.38 
3.60 2.84 
 
c = m = f = vf = v. = 
 
coarse medium fine very fine very 
 
sd = sand sh = sl:}ell sdy = sandy 
 
COMMENTS 
layered sediment above small channel 
low Tl208 activity very low percent heavy 
minerals channel probably not 
cored 
layered sediments between sandwaves 
low to moderate galll1lla activity 
very low percent of heavy minerals 
layered sediments between sandwaves 
dense organic clay layer overlying highly oxidized sand 
high K40 and Tl208 activity 
wood was found on anchor fluke 
 
 For convenience in selecting our reports from your bookshelves, they are color-keyed across the spine by subject as follows: 
 
Red Dk. Purple Maroon Lt. Green Lt. Blue Dk. Green Dk. Blue Olive 
Yellow 
:Dk. Orange Brown Black Dk. Brown 
 
Valley and Ridge mapping and structural geology Piedmont and Blue Ridge mapping and structural geology Coastal Plain mapping and stratigraphy Paleontology Coastal Zone studies Geochemical and geophysical studies Hydrology Economic geology Mining directory Environmental studies Engineering studies Bibliographies and lists of publications Petroleum and natural gas Field trip guidebooks Collections of papers 
 
Colors have been selected at random, and will be augmented as new subjects are published. 
 
Publications Consultant: Patricia Allgood 
$3310/200 
The Department of Natural Resources is an equal opportunity employer and,dfers all persons the opportunity to comP<.,::e and participate In each area of DNR employment regardless of race, color, religion, ~~; na~OQ?l origin, age, handicap, or other non,<rtc:!rlt fade,,.., _