GEORGIA STATE DIVISION OF CONSERVATION DEPARTMENT OF MINES, MINING AND GEOLOGY GARLAND PEYTON, Director THE GEOLOGICAL SURVEY Bulletin Number 70 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA by Stephen M. Herrick, Geologist United States Geological Survey Prepared cooperatively by the U. S. Geological Survey ATLANTA 1961 GEORGIA STATE DIVISION OF CONSERVATION DEPARTMENT OF MINES, MINING AND GEOLOGY GARLAND PEYTON, Director THE GEOLOGICAL SURVEY Bulletin Number 70 WELl"' LOGS OF THE COASTAL PLAIN OF GEORGIA by Stephen M. H errick, Geologist United States Geological Survey Prepared cooperatively by the U. S. Geological Survey ATLANTA 1961 LETTER OF TRANSMITTAL Department of Mines, Mining and Geology May 2, 1961 His Excellency, S. Ernest Vandiver Governor of Georgia and Commissioner Ex-Officio State Division of Conservation Atlanta, Georgia Dear Governor Vandiver: I have the honor to submit herewith Georgia Geological Survey Bulletin No. 70 "Well logs of the Coastal Plain of Georgia by Dr. Stephen M. Herrick of the Ground Water Branch, Water Resources Division, United States Geological Survey. This report contains much valuable data about the geology and water-bearing formations of the Coastal Plain of Georgia. The ground-water information will be of tremendous aid to the cities, industries, farmers, and well drillers of the State in their search for water supplies. The geologic information will help those who are engaged in the search for petroleum in Georgia. The report includes a map showing the location of the wells. I believe that this report will be one of the most valuable contributions in the search for water and oil that we have prepared in cooperation with the Federal Survey. Very respectfully yours, Garland Peyton, Director iii 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CONTENTS Page Introduction -- ---- - ___ . _. ___ _ 1 Acknowledgments _____________________ 2 Treatment of Well Samples ______ 2 Correlation ______ ------------------------- __ 3 Well Logs ----------- -- . --- ------------------ 5 Appling County ______________________ _ 5 GGS 50 ------------- __________________________ 5 GGS 148 ------------------------------------ 6 GGS 161 ------------------------------------ 10 Atkinson County __ .. ___________ 11 GGS 107 ______ --------------------------- 11 GGS 425 -------------------------------------- 14 Bacon County _ 16 GGS 58 ______ 16 Baker County _ 17 GGS 479 ____ _ 17 Ben Hill County _ 17 GGS 154 __ _ 17 GGS 160 __ 19 GGS 355 ___ 20 Berrien County 21 GGS 159 __ 21 GGS 421 __ 21 Bibb County 23 GGS 7 ___ _ 23 GGS 8 ___ _ 24 GGS 230 _ 24 GGS 357 _ 25 GGS 361 _ 26 Bleckley County 27 GGS 106 _ 27 GGS 195 _ 27 GGS 277 _ 29 Brantley County 30 GGS 9 __ _ 30 GGS 90 __ 31 Brooks County 32 GGS 3 _ 32 GGS 21 33 GGS 77 _ 33 GGS 87 __ 34 GGS 184 _ 35 GGS 469 _ 37 Bryan County 38 GGS 65 __ 38 GGS 459 __ 39 Bulloch County 40 GGS 81 __ _ 40 GGS 378 . 42 GGS 430 __ 43 GGS 432 45 GGS 553 _ 46 GGS 571 _ 47 Burke County . 49 GGS 131 __ _ 49 GGS 139 __ 50 v Page GGS 220 _ 50 GGS 316 _____ _ ________ ___ 52 GGS 391 __ ___ ___ ______ 53 GGS 392 ____ _ __________ .. _ 54 GGS 520 _______ _ ___ ________ 55 Calhoun County ____ __ __ ___ __ _____ 56 GGS 192 ----------------- _ _____ __ __ 56 GGS 330 ----- _-- ---- ______ _______ 58 GGS 331 _____ _ __ _ _______ _ 59 GGS 353 ____ ----------------- ___________ 61 Camden County __ __ __ _____ __________ 63 GGS 54 ____ . _____________ _____ 63 GGS 364 _ __________ 65 GGS 365 _ 66 GGS 455 _ 68 Candler County 69 GGS 429. 69 GGS 574 _ 70 GGS 581 _ 72 GGS 582 _____ 73 Charlton County 7 4 GGS 93 ______ ___ ___ 7 4 GGS 185 __ _ __ ____ ___ 75 GGS 453 ____ 76 Chatham County __ __________ 78 GGS 1 __ 78 GGS 35 __ ___ __________ 79 GGS 61 ___ __ 81 GGS 62 _________ 83 GGS 80 _____ _ 86 GGS 125 __ __ 88 GGS 377 ___ _ _ 89 GGS 379 __ 91 GGS 380 _______ . ___ ______ _ 92 GGS 381 _ ______ ____ ____ _ _ 94 GGS 394 __ ____ _______ ___ __ 97 GGS 395 __ ___ _____ __ ___ _____ __ 98 GGS 396 __ ___ . _____ __ 99 GGS 506 __ _____ __ 101 GGS 523 __ ___ _ __ 103 GGS 535 __ _ _ 105 GGS 561 _ GGS 562 __ 106 __ 107 GGS 563 _ ___ 108 Chattahoochee County GGS 18 __ __ _ 110 _ 110 GGS 332 _ GGS 341 _ .. _ 111 _ 112 Clay County _ GGS 402 _ GGS 435 GGS 464 _ GGS 556 _ - 114 114 - 116 - 117 - ...... 118 Clinch County _. GGS 86 ----- _ GGS 124 __ --- 120 ......... 120 121 CONTENTS (Cont'd.) Page Coffee County ____________________________ 122 GGGGSS 223463 -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_--_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 112223 GGS 434 ----------------------------------- 124 GGS 445 __ ____________ 125 Colquitt County ___________________________ 128 GGS 22 --------------------------------------- 128 GGS 170 ____ --------------------------------- 129 GGS 175 -------------------------------------- 132 Columbia County -------------------------- 133 GGS 264 ________ _____ ____________ 133 Cook County ---------------------------------- 134 GGS 25 --------------------------------------- 134 GGGGSS 31918---_-_-_-_-__-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_---_-_-_-_-_-_-_-_--_-_ 113356 GGS 122 ------------------ ___ _________ 137 Crisp County -------------------------------- 138 GGS 155 ----------------------------------- 138 GGS 216 ------------------------------------- 140 GGS 225 ______ __________ 140 GGS 226 _ _____________ 141 GGS 245 _ _____ _ _______________ 142 GGS 249 _ ____________________ 143 GGS 250 _ _ __ __ _____ __ _ 144 GGS 251 _ ___ _______ __ 145 GGS 390 _ _ ____ 146 Decatur County ___ GGS 49 GGS 57_ GGS 168 _ GGS 228 __ ______ 149 _ _ ____ 149 _____ 150 _____ __ 152 __________________ 155 Dodge County _ GGS 222 _ GGS 233 _ GGS 240 _ GGS 267 _ GGS 269 _ GGS 273 _ 156 __ 156 __ 157 _______ 157 _ __ 158 ______ 159 _____________ 160 Dooly County _ GGS 143 _ GGS 241 _ GGS 246 _ GGS 257 _ GGS 258 GGS 306 _ _ ___ 161 _ _ 161 _ _ 163 _ 163 _____ _ ___ 164 _____________ 165 __ ______ 166 GGS 619 _ ___ 167 Dougherty County GGS 11 _ __ _ _ 170 _______ 170 GGS 248 _ GGS 261 _ GGS 290 _ GGS 405 ___ __ 172 __ 175 _________ 178 _____ 178 Early County __ 181 GGS 121 _ __ 181 GGS 138 _ 184 GGS 234 __ _ ____ _ 185 GGS 321 ____________ _ __ __ __ 186 GGS 351 ___________________________ 187 vi Page GGS 358 _ __________________________ 189 GGS 437 _ _____________ 190 GGS 483 _______ __ ____ _ __ _______ 193 Echols County __________________ 195 GGS 189 ____ __ _____ 195 Effingham County __ _____________ 198 GGS 211 ____________________________________ 198 GGS 457 ____ _ _____________________ 199 GGS 458 ___________________________ 201 GGS 569 ______ ___ __________________ 202 Emanuel County _____________________ 203 GGS 176 _ _ ___________________ 203 GGS 372 _ _ _ _ ____ 205 GGS 373 ______ _ _________ 207 GGS 567 _____ ___ ___________________ 208 GGS 568 _ ___ _________________ 209 Glynn County ____ _______ 210 GGS 5 ____ __ __ __ 210 GGS 20 ___ _ ____ 212 GGS 197 __ _ __________ _ _ __ 213 GGS 362 _ _____ _______ ____ 214 GGS 376 _ _ _ 216 GGS 431 __ 217 GGS 452 __________ 218 GGS 530 _ ______________ 219 Grady County _ GGS 140 __ GGS 141 __ GGS 205 _ _ _ GGS 493 _ GGS 494 _ ______ __ 221 ___ 221 ____ _ 222 ____ ______ 223 __ ____ 224 ____ 225 Houston County _ GGS 53 _ GGS 194 GGS 318 _ GGS 370 __ GGS 374 _ GGS 414 __ __ 226 _ _ 226 _____ 227 ______ 229 ____ 230 ____ 231 _ __ _ 232 Irwin County GGS 274 ___ _____ 233 _ 233 Jeff Davis County _ GGS 157 __ _____ 234 __ 234 Jefferson County GGS 133 __ GGS 219 _ GGS 480 _ GGS 532 __ GGS 554 __ _ __ 235 235 __ 236 _ _ 237 ____ 239 ____________ 240 Jenkins County _ GGS 227 ___ _ ___ 242 _ ___ 242 Lanier County GGS3~- ____ 243 ~2~ Laurens County GGS 438 _ __ _ 244 _ 244 Lee County GGS 74 GGS 270 _ _ ____ 246 _ 246 __ 248 r CONTENTS ( Cont'd.) Page GGS 271-------------------------- 249 GGS 286 -------------------------------------- 250 GGGGSS 249294 -__-_-_-_-_------_-_-_-_-_-__-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ 225501 Liberty County ------------------------------ 253 GGS 6 ------------------------------------------ 253 GGS 38 --------------------------------------- 255 GGS 66 ---------------------------------------- 256 GGS 72 ---------------------------------------- 257 GGS 363 -------------------------------------- 258 GGS 460 ------------------------------------- 262 GGS 548 _____ _____ ------------------------ 263 Long County ---------------------------------- 264 GGS 67 ---------------------------------------- 264 Lowndes County ---------------------------- 265 GGGGSS 1254 -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-__-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 226657 GGS 27 ---------------------------------------- 267 GGS 40 ---------------------------------------- 268 GGS 42 ---------------------------------------- 269 GGS 47 ---------------------------------------- 270 GGS 78 _______ _________ ----------------- 270 GGS 79 ______________ ------------------------- 271 GGS 173 -------------------------------------- 272 GGS 179 ______ ------------------------------ 274 GGS 182 _______ ___ _ ___________________ 274 GGS 198 ------------------------------------- 276 GGS 356 ___________ -------------------------- 276 GGS 404 ______ ---------------------------- 277 GGS 412 __ ----------------------------------- 278 GGS 500 ________ --------------------------- 280 GGS 511 ________________ ------------------- 281 Mcintosh County __________________________ 282 GGS 84 ______ _---------------------- 282 GGS 88 __________ -------------------- 283 GGS 596 __ _ ----------------- 284 Macon County __ ___ ________ _____________ 285 GGS 60 __ ______ _ _ _ _ __________ 285 GGS 145 ____ __ _____ ________ 287 GGS 229 _ ___ ___________ 288 GGS 408 _ _ ___ _ ____ ____________ 289 GGS 422 ____________________________ 291 Marion County ______________________ 292 GGS 329 _ ___ __ ____ _______ ___ ____ ___ 292 GGS 347 _ _ __ -------------- 293 GGS 388 _______ ____ _ __________ 293 GGS 409 ________ _ _________ 294 GGS 427 ___________ ___ _______ 295 GGS 443 __ _____ ______ _________ 296 GGS 476 _______ __ _ ______________ 296 Miller County _________________________ 298 GGS 112 ____________ _ ___ _ ____ 298 Mitchell County _____________________ 299 GGS 100 _________________________________ 299 GGS 109 _ _________________ 300 GGS 218 __ _____ __ _____ 303 GGS 400 ________ _______________ __ 304 vii Page GGS 417 _____ ------------------ _____ 304 GGS 564 ----------------------------------- 305 GGS 620 ---------------------------------- 306 Montgomery County ____________________ 307 GGS 319 _______________,____________________ 307 GGS 450 ----------------------------------- 308 GGS 514 ----------------------------------- 309 GGS 515 --------------------- -------------- 310 GGS 600 -------------------------------------- 311 Muscogee County -------------------------- 313 GGS 235 ------------------------------------ 313 Peach County -------------------------------- 314 GGS 348 -------------------------------------- 314 GGS 369 ------------------------------------ 315 GGS 426 -------------------------------------- 316 Pierce County -------------------------------- 318 GGS 119 ------------------------------------- 318 GGS 120 -------------------------------------- 321 GGGGSS 546156 _--_-_-_-_-_-_-_-_--_-_-_-_-_-_-_-_-_--_-_-_-_-_-_-_-_--_-_-_-_-_-_-_-_- 332223 Pulaski County ------------------------------ 325 GGS 237 ----------------------------------- 325 GGS 238 ------------------------------------- 326 GGS 242 _ ---------------- _____________ 327 GGS 256 __ ______________ _____________ 327 GGS 339 ------------------------------------- 328 GGS 472 ------------------------------------ 330 Quitman County --------------------------- 333 GGS 436 ------------------------------------ 333 GGS 502 ------------------------------------ 334 Randolph County __________________________ 336 GGS 552 ---------------------------------- 336 Richmond County ________________________ 337 GGS 129 ---------------------------------- 337 GGS 130 ---------------------------- ______ 338 GGS 309 ___ ------------------------------ 339 GGS 371 ___ --------------------------- 340 GGS 526 _______________ _______________ 341 Schley County _____ ---------------------- 342 GGS 75 ------------------------------------- 342 GGS 174 ------------------------------------- 343 GGS 312 ________ ------------------------- 344 GGS 315 ------------------------ __________ 345 Screven County ---------------------------- 346 GGS 295 ------------------------------------- 346 GGS 413 ------------------------------------- 348 GGS 462 ------------------------------------ 349 GGGGSS 559708 -_-_-__-_-_-_-_-_-_-_---_-_-_-_-_-_------_-_-_-_-_-_-_-_-_-_-_-_- 335510 Seminole County ________________________ 353 GGS 149 ________ __ _ ______________ 353 GGS 187 _______ ---------------- 353 Stewart County __________________________ 356 GGS 451 _ ------------------ 356 GGS 478 ---------------------------------- 357 CONTENTS (Cont'd.) Page Sumter County ----------------------------- 358 GGS 137 ------------ --------- ------------ 358 GGS 147 ------------------------------------ 359 GGS 215 ------------------------- ________ 361 GGS 280 ---------------------------------- 362 GGS 281 ------------------------------------ 362 GGS 283 ________ --------------------------- 363 GGS 291 -------------------------------------- 364 GGS 296 ------------------------------------- 365 GGS 303 --------------------- ______________ 365 GGS 333 --------------------------- _______ 366 GGS 342 ------------------------------------- 368 GGS 440 ------------------------------------- 369 GGS 442 ------------------------------------ 371 GGS 504 ----------------------------------- 373 Talbot County -------------------------------- 374 GGS 403 ----------- ------------------------- 374 Tattnall County ---------------------------- 375 GGS 180 ------------ ----------------------- 375 GGS 522 ------------------------- ___________ 377 GGS 583 _________ _______ ________ ________ 378 Taylor County __ _____________ 379 GGS 428 _______ _ _______ _ ____________ 379 GGS 492 _________ ____________ 379 GGS 499 ------- ____________ 380 GGS 533 -------- _____________ 381 Telfair County _ __ __ __ ____ ____ 381 GGS 375 _______ _ _____ __ __ 381 GGS 507 ______ ________ 384 Terrell County _____________ 385 GGS 213 _____________ _____________ 385 GGS 285 _________ ___ __ __ __ ________ 388 GGS 350 _____ _ _______ _______ 388 GGS 352 __ ______ ____ _____ 390 GGS 368 __________ _ ________ 391 GGS 406 _____ __ 392 GGS 407 _____ ________ 394 GGS 503 ______ _ __ 396 Thomas County GGS 19 ______ ___ ____________ 397 ____________ 397 GGS 132 ____ ---------------- _______ 398 GGS 401 ______ ________ ___ ________ ___ 400 GGS 495 ______ _____________________ 401 Tift County _ _____ ___ __ _____ ____________ 402 GGS 82 _____ ----------------------------- 402 GGS 292 ----------------------------------- 404 Toombs County----------------------------- 405 GGS 95 -------------------------------------- 405 Treutlen County ___________________________ 408 GGS 127 _ _____________________________ 408 Turner County _ -------------------------- 410 GGS 2 ---------------------------- ___________ 410 GGS 13 ____ _____________________ 411 Page GGS 164 ____ _ __ _____ 412 GGS 210 __ __ _ GGS 557 ________ GGS 565 _________ _ 412 _ 413 _____ 415 Twiggs County ______________________ 416 GGS 354 ___________________________ 416 GGS 360 _______________________________ 417 GGS 415 ______________ _ _______________ 418 GGS 416 __________ ______________ 418 Ware County ____ GGS 36 _________________ GGS 366 ______________ GGS 527 _______________ GGS 538 ________________ _______________ 419 ____________ 419 _______ 420 ____________ 422 _____ 423 Washington County ____ ________________ 424 GGS 94 ------------------- ____ _____ _______ 424 GGGGSS 122532 -_-_-_-_-_-_-_-__-_-_-_-_-_-_-_-_-_-------------_-_-_--_-_- 442268 GGS 433 __________ _________ _____ ____ __ 429 GGS 521 --------------Wayne County _ GGS 52 _____________ GGS 96 ____________ __ GGS 262 __________ _____ _ __ __ 429 _______ 430 _ 430 ___ 434 ___ 435 GGS 297 ______ GGS 454 ________ GGS 466 __ ___ __ __ _ 436 _ 438 _ _ 439 GGS 555 ______ __ _ _ 440 Webster County ___ GGS 323 ______________ _ _ __ 442 __ 442 GGS 488 ____________ __ 443 GGS 559 --------------- ___ 444 Wheeler County ___ _ ___ _ 445 GGS 92 _______________ __ __ __ _ __ _ 445 GGS 336 -------GGS 337 ---------- __ 446 _________ 449 Wilcox County _ _ _ ________ 450 GGS 68 __________ _ __ __ _ _ _ 450 GGS 70 ---------- ___ GGS 136 ________ ____ _ _ _ 450 _ _ __ 451 GGS 142 ------------- __ 452 GGS 349 --------- ___ ______ ___ _ 452 Wilkinson County __ _____ 453 GGS 441 ___________ _____________ 453 GGS 529 --------- ____ ------------- 454 Worth County__________ ______________ 455 GGS 232 ------- ___________________ 455 GGS 456 ________ _______________________ 455 GGS 471 _______ ____________ _____________ 456 Beaufort County, S. C. _______________ 457 GGS 385 __ ___ ___ ________________ 457 GGS 566 ___ __ ____ ______ __________ 459 References _______________________ 461 ILLUSTRATIONS Figure 1. Well location map, Coastal Plain of Georgia ____ viii _________ In Pocket WELL LOGS OF THE COASTAL PLAIN OF GEORGIA By Stephen M. Herrick Introduction Nearly all cities and all rural dwellers of the Coastal Plain of Georgia obtain their water supply from wells. This section of Georgia has some of the most extensive and productive aquifers in the United States. In the years since World War II, the development of the ground-water resources has more than doubled in some parts of the Coastal Plain, and it is considered as the key to future economic development of other parts as well. The study of the lithologic characteristics and stratigraphic extent of the surface and subsurface formations of an area is an important adjunct to our knowledge of the occurrence and availability of ground water. One purpose of this study, therefore, was to correlate subsurface information in order to know the lithologic characteristics and stratigraphic extent of the water-bearing formations of the Coastal Plain. It is hoped that this information will prove helpful in the planning of future geologic and ground-water studies. Another purpose of this study was to make available to the well drillers and the public information concerning the depth, thickness, and lithology of the water-bearing formations. Where quality-of-water problems exist, an attempt has been made to note this fact in the log, thereby pointing to the need for additional ground-water investigations. This report includes well logs representative of all the Coastal Plain counties. The information may be used as a guide to those individuals or communities planning to develop the ground-water resources of their county, to tell them the type of material to be drilled through, the probable water-bearing zones, and the probable depth of a completed well. This report contains a total of 354 well logs. The basis for these logs is well cuttings, or well samples, which have been collected by the Geological Survey during the period 1938 to 1960. Prior to 1938, samples of "wildcat" oil tests were collected by the Georgia Geological Survey and the descriptions of some of them are included. The logs are the result of studies carried on by the author intermittently for approximately 13 years and full time since 1956. A few important logs, particularly those of certain oil tests, have necessarily been omitted from this report. Others have been published and may be consulted in the literature, and hence do not require repetition here. This report serves to bring up to date certain information about the geology of the Coastal Plain in Georgia. Many stratigraphic problems still exist. This report will serve as a basis for future, more detailed, investigations dealing with some of these problems. 2 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Acknowledgments The report was prepared as a part of the ground-water investigations of Georgia being made by the U.S. Geological Survey in cooperation with the Georgia Department of Mines, Mining, and Geology, Garland Peyton, Director. Ground-water investigations of the Geological Survey are made under the general supervision of P. E. LaMoreaux, Chief, Ground Water Branch. Acknowledgment is made of the willing cooperation of many well drillers who furnished the well cuttings for the logs. Electric logs were an important aid to this study. Many electric logs were furnished by Captain Peyton from the files of his Department. Others were made by personnel of the Ground Water Branch. Treatment of Well Samples The wells described herein were selected partly on the basis of geographic location so that at least one well log would be available for every county, and partly with regard to the completeness of well samples and extent of the geologic section penetrated. All samples were examined under the binocular microscope. The gross lithology is described and some of the microfossils, chiefly Foraminifera, are listed. Preparation of the individual samples prior to examination followed the standard procedure well known to micropaleontologists the world over. The Foraminifera represent the paleontologic control utilized in this study. The author made all the identifications shown. Of the individual species observed, only a relatively small number are included in the logs. However those listed represent the principal diagnostic guide fossils and first observed occurrences. Individual species representative of the formations penetrated during drilling were identified from comparative surface (outcrop) material wherever possible, otherwise from published descriptions and figures bearing on the subject. In many instances the specific identity of various diagnostic foraminiferal species, chiefly the "larger" Foraminifera, was not known. In such cases the specific name was omitted and only the generic name utilized, such as Lepidocyclina sp., Asterocyclina sp., Operculinoides sp. Moreover, complete scientific terminology for the individual species was not considered necessary for purposes of this report, and the nomenclature does not necessarily conform with present usage throughout. Representative specimens of the foraminiferal species included in this report are deposited at the U.S. National Museum, Washington, D. C. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 3 Correlation Formational names used in this report are those accepted by the U.S. Geological Survey as applicable to the southeastern Gulf Coast. In the use of the terms Flint River and Suwannee, however, it is believed that more work is needed before the true stratigraphic positions of these formations in Georgia is fully understood. To avoid difficulties these units are referred to as Oligocene undifferentiated. In general, the same can be said of certain other nomenclatural problems of the Tertiary strata of the Coastal Plain of Georgia, such as Pleistocene to Recent, Pliocene to Recent, Miocene, and lower Eocene. In this report the heading Gosport sand is not generally employed. Although the Gosport sand is a definite mappable unit in parts of the Coastal Plain, particularly in Houston County, it cannot always be differentiated from cuttings in the subsurface. For this reason it was thought best usually to include it as part of the Lisbon formation or Claiborne group, undifferentiated, as the case may be. The strata of Cretaceous age in the southeast have been described in reports by other investigators, including W. Storrs Cole, Paul and Esther Applin, and others. In instances where Cretaceous strata were penetrated, the logs either were discontinued short of total depth or that part of the section summarized into generalized divisions such as post-Tuscaloosa, Tuscaloosa formation, and in rare instances Lower Cretaceous (?) . In the logs of such wells, the first observed occurrences of key fossils in the post-Tuscaloosa part of the sections are listed in order to help other workers attempting to reconstruct the geologic history of the Coastal Plain. In wells penetrating rocks of pre-Cretaceous age no attempt is made to describe them in any detail. In most instances such rocks are designated crystalline rocks, or basement complex undifferentiated. In others the logs are discontinued short of the basement complex. The strata of Tertiary age are the most important sources of ground water in the Coastal Plain as a whole, and the geologically older beds of Cretaceous age are important as water-bearing formations only along the upper limits of the Coastal Plain, immediately downdip from the Fall Line. Greater emphasis was therefore placed on the rocks of Tertiary age. In the lithologic descriptions of the well cuttings, the dominant type of sediment is mentioned first, followed by the other types according to the degree of representation in the samples. Elevations employed in this report refer to mean sea level. Many elevations were obtained by means of an aneroid barometer and hence are subject to a possible error of several feet. Other elevations represent average figures, taken from highway maps issued by the Georgia Highway Department. For reconstructing subsurface conditions by means of cross sections, where only relative elevations are needed, it is felt that elevations of this order of accuracy are adequate. As time goes by and new topographic maps appear, these elevations will gradually be replaced by more accurate figures. The well logs are listed alphabetically by counties. Each log has the designation GGS (Georgia Geological Survey) followed by the number assigned to the well, as GGS 436. No attempt was made to list part of a section represented by a missing interval (missing samples). Where the missing interval occurs at the top of a formation, the designation In as "In middle Eocene" was used. 4 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 The word In also precedes those units, the top of which could not be determined from study of the samples even though all the samples were available. The descriptive part of each log is followed by a summary of the stratigraphy and a listing of the potential water-bearing zones penetrated in the well. The locations of wells included in this report are shown on the map (fig. 1.) where they are designated by their numbers, the letters GGS being omitted. The symbols differentiate between an oil test and a water well and between definite and indefinite locations. Each well shown as indefinite in location cannot be plotted in its true geographic location because it is not known, but each has been located as closely as possible in the locality indicated. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 5 APPLING COUNTY Location: 650 ft. west of Southern Depot and 110 ft. north of Southern R.R. in city of Baxley Owner: No. 3 City of Baxley Driller: Gray Well and Pump Corporation Drilled: February 1942 Well No.: GGS 50 Elev.: 204 Thickness Depth (feet) (feet) No samples 40 40 In Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained; some very sandy clay, pale- green or mottled _____________ ___________________ _ 55 95 Miocene (Undifferentiated): Clay: pale-green, sandy, phosphatic at depth; interbedded sand and limestone _ ____________ _____ _______ 393 488 Sand, fine to medium-grained with many black phosphatic pebbles at 225-275. Sand, fine to coarse-grained, abundant black phosphatic pebbles at 415-430. Sand as above; and many fragments of limestone, gray to white, dense (calcitized) at 430. Sand, fine to coarse-grained, with abundant black phosphatic pebbles at 465-475. Limestone: gray to white, sandy, phosphatic, fossiliferous, dolomitized at depth ____ ______________________ _________________ _ 27 515 Oligocene (Undifferentiated): Limestone: gray, dense (much calcitized) nodular, fossilifer- ous (Foraminifera) _________ ______________________ ____________________________________ 75 590 Rotalia byramensis var., Asterigerina sp., Pyrgo sp. at 515525. No samples ------------------------------------------------- ------------------------------------ 20 610 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: reddish-brown, extremely dense and crystalline (highly calcitized), fossiliferous (many Foraminifera) 20 630 Gypsina globula, Operculinoides sp., Asterocyclina nassauensis at 610-620. Operculina mariannensis at 620-630. 6 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Limestone: light-gray, extremely dense and crystalline (high- ly calcitized), fossiliferous (as above) 90 Pseudophragmina sp., Lepidocyclina sp. at 700-710. Limestone: white, soft and chalky in streaks; otherwise considerably calcitized and crystalline, fossiliferous (as above) __ 100 Heterostegina ocalana at 760-770. Amphistegina pinarensis var. at 770-780. Limestone: light-gray, extremely dense and crystalline, as interval 630-720 _ ____ __ __ ___ 20 Depth (feet) 720 820 840 Summary: No samples _____________ _ In Pliocene to Recent (undifferentiated) Miocene (undifferentiated) __ Oligocene (undifferentiated) No samples -------------------------------In upper Eocene (Ocala limestone) __ _ 40 40 55 95 420 515 75 590 20 610 280 840 Limestone _ Potential Water-Bearing Zones: 325 840 APPLING COUNTY Location: 2,433 ft. north, 2,796 ft. west of southeast corner of Land Lot 522, 2nd Land District Owner: No.1 W. E. Bradley Driller: Felsenthal and Weatherford Drilled: July 1947 Well No.: GGS 148 Elev.: 229 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to medium-grained, angular 10 10 No samples _______________ 50 60 Clay: pale-green, sandy; interbedded sand, fine to medium- grained, angular, phosphatic at depth ____ 300 360 Jet-black phosphatic pebbles abundant at 180-210. Limestone: cream, somewhat saccharoidal and crystalline, rather dense, sandy, phosphatic, fossiliferous at depth (macroshells) ; scattered beds of sand, as above 120 480 Macroshells at 450-470. Limestone: as above, but somewhat dolomitized _ 40 520 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 7 Oligocene (Undifferentiated): Thickness (feet) Limestone: light-gray, much calcitized, massive, nodular, fos- siliferous (some megafossils, echinoid and bryozoan re- mains, and Foraminifera) _________________ _ 120 Rotalia mexicana var. at 540-550. Gypsina globulat, Asterocyclina sp. at 560-570. Dictyoconus1 sp. at 580-590. Depth (feet) 640 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, more porous than above, fossiliferous (macroshells, echinoid and bryozoan remains, and Fora- minifera) ____ _____ ____________ _____ ____ ___ __ __ ______ 120 760 Lepidocyclina sp., Camerina sp. at 640-650. Operculinoides ocalanus, Asterocyclina sp. at 650-660. Camerina striatoreticulata at 700-710. Limestone: as above, but much calcitized, crystalline, mas- sive, fossiliferous (Foraminifera at certain levels) 160 920 Operculina mariannensis at 780-790. Various species of larger Foraminifera abundant at 800900. In Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: cream, much calcitized, somewhat granular in texture, rather massive, coarsely glauconitic at depth, cherty at certain levels; interbedded limestone, gray, dense, crystalline, massive, sandy, glauconitic (finely dissemi- nated), fossiliferous (macroshells and bryozoan remains at certain horizons) ; sand, fine to medium-grained, angu- lar, somewhat phosphatic__ ______________________ 430 Cibicides westi at 1260-1270. Operculinoides sp. at 1300-1310. Sand: fine to coarse-grained, angular; marl, gray, somewhat carbonaceous, micaceous, glauconitic ________________ __________________ 80 Limestone: white, dense, much calcitized, coarsely glauconitic, fossiliferous; dolomitic limestone, dark-brown, saccharoidal, glauconitic _______________ ___________ ______________ 100 Macroshells common to abundant at 1450-1530. -'Reworked ( ? ) fossil of middle Eocene age. 1,350 1,430 1,530 8 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Tallahatta Formation: Thickness (feet) Sand: fine to coarse-grained, angular, abundantly glauconitic; relatively thin stringers of marl, dark-gray, silty, glauconitic, fossiliferous (Foraminifera at certain horizons)__ 160 Cibicides tallakattensis at 1570-1580. Valvulineria jacksonensis var. at 1600-1610. Depth (feet) 1,690 Lower Eocene and Paleocene (Undifferentiated): Marl: gray, silty, carbonaceous, micaceous, glauconitic, fos- siliferous (Foraminifera) _----------------------------------------- 70 Eponides dorji, Globorotalia wilcoxensis at 1715-1538. No samples _______________________________ 30 Limestone: gray, much calcitized, dense, crystalline, massive, glauconitic --------------------------------- ----------------------------------------------------- _ 90 Sand: fine to medium-grained, angular; interbedded marl, dark-gray, somewhat fissile, carbonaceous, micaceous (finely disseminated); and limestone, as above_____________ __________ 215 1,760 1,790 1,880 2,095 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Sand: fine to medium-grained, angular; interbedded marl, gray, silty, glauconitic, micaceous, pyritiferous, fossilifer- ous (macroshells, Ostracods, and Foraminifera at certain levels) --------------------------------------------------- _______________ ___ _______________ 215 Anomalina pseudopapillosa at 2155-2170. Globotruncana sp., Gaudryina sp. at 2275-2290. Dorothia sp., Guembelina striata at 2300-2310. Marl: gray to brown, more fissile (shaley) with depth, silty, micaceous, carbonaceous, pyritiferous, fossiliferous (mega- fossils, Ostracods, and Foraminifera at certain levels) 440 Cibicides harperi at 2480-2490. Planulina taylorensis at 2580-2590. Sand: fine to medium-grained, angular, phosphatic; inter- bedded marl, as above ---------------------------------------------------------- 150 Marl: brown, fissile, silty, carbonaceous, micaceous, pyriti- ferous, fossiliferous (Foraminifera)----------------------------------- 50 2,310 2,750 2,900 2,950 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 9 Thickness (feet) Inoceramus prisms common, Kyphopyxa christneri at 29002910. Sand: fine to coarse-grained, angular, somewhat indurated at certain levels, micaceous, phosphatic, fossiliferous, (macroshells, a coquina at certain horizons)~~~~~~~~~~~~-~-~~~~~~~~ 100 Depth (feet) 3,050 Tuscaloosa Formation: Sand: fine to coarse-grained, angular, glauconitic, fossiliferous (macroshells) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 70 Sand: dark-gray to black, fissile, carbonaceous (finely dis- seminated) ; interbedded sand, as above ~~~~~~~~~~~~~~~ 200 Sand: fine-grained, indurated, micaceous, glauconitic 100 Sand: coarse-grained, massive, angular, arkosic; clay, dark- brown to brick-red, waxy, micaceous, sandy ~~~~~~~~~~~~~~~ 540 Siderite nodules abundant at 3480-3490. 3,120 3,320 3,420 3,960 Lower Cretaceous (?) (Undifferentiated): Clay: pale-green to brick-red, waxy, highly micaceous, sandy; interbedded sand, coarse-grained, angular, arkosic ~~~~~~~~~~~~~~~~~~ 115 4,075 Basement Complex (Undifferentiated): Crystalline rock, undifferentiated 23 4,098 Summary: Miocene (undifferentiated) ~~~ ~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 520 0 ligocene (undifferentiated) ~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 120 Upper Eocene (Ocala limestone) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 280 In middle Eocene (Lisbon formation) ~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~-~~~~~~~~~~~~~~~~~~ 610 In middle Eocene (Tallahatta formation) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 160 Lower Eocene and Paleocene (undifferentiated) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 405 Upper Cretaceous (post-Tuscaloosa undifferentiated) ~~~~~~~~~~~~~~~~~~~~ 955 Upper Cretaceous (Tuscaloosa formation) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 910 Lower Cretaceous (?) (undifferentiated) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 115 Basement complex (undifferentiated) ~~~~~~~~~~~~~~~-~~~~~~~~~~~~~~~~~~~~~~~~ 23 520 640 920 1,530 1,690 2,095 3,050 3,960 4,075 4,098 Potential Water-Bearing Zones: Limestone ~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-~~~~~~~~~~~~~~~~~~~~~~~~~~ 320 Sand: fine to coarse-grained ~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 50 860 1,430 10 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: About 2 mi. east of Graham, Land Lot 108, 3rd Land District Owner: No. 1 Baptist Home Driller: W. B. Graham Drilled: 1947 APPLING COUNTY Well No.: GGS 161 Elev.: 199 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to coarse-grained, arkosic at depth __ 90 90 Miocene (Undifferentiated): Clay: light-gray to pale-green, very sandy, phosphatic at depth; interbedded sandy limestone and beds of sand ______________ 460 550 Gray to brown phosphatic pebbles at 230-240. Sand, indurated, phosphatic, at 390-420. Dolomitic limestone, light-brown, sandy, phosphatic, at 420-450. Sand, fine to coarse-grained, phosphatic at 450-550. Oligocene (Undifferentiated): Limestone: cream to light-gray, soft and dense (calcitized), nodular, fossiliferous (Foraminifera) _____________ _ 80 630 Rotalia byramensis at 550-560. Dictyoconus1 sp. at 570-580. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, dense (much calcitized), fossiliferous (bryozoan remains and Foraminifera) 10 640 Operculinoides flo1-idensis at 630-640. Summary: Pliocene to Recent (undifferentiated) Miocene (undifferentiated) _______________________________________ Oligocene (undifferentiated) __________________________ Upper Eocene (Ocala limestone) __________________ _ 90 90 460 550 80 630 10 640 Potential Water-Bearing Zones: Sand: fine to coarse-grained _ _________________________________ Sand: fine to coarse-grained, phosphatic Limestone _ 'Reworked(?) fossil of middle Eocene age. 10 60 100 550 90 640 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 11 ATKINSON COUNTY Location: 1,650 ft. north and 660 ft. east of southwest corner of Land Lot 71, 7th Land District Owner: No. 1 Doster Ladson Driller: Sun Oil Company Drilled: January 1945 Well No.: GGS 107 Elev.: 222 (derrick floor) Thickness Depth (feet) (feet) No samples 90 90 In Miocene (Undifferentiated): Sand: fine to coarse-grained, subangular, phosphatic 10 100 Sand: as above; and clay, pale-green, somewhat indurated and tough, sandy ____ ________________ _ 70 170 Limestone: cream to light-brown, dense, somewhat saccha- roidal, much calcitized, sandy, fossiliferous (molluscan shells); interbedded with sand and clay, as above _ 90 260 Oligocene (Undifferentiated): Limestone: cream, nodular, rather massive, cherty, sandy, fossiliferous (some Foraminifera) __________________ 130 390 Quinqueloculina sp., Rotalia mexicana var., Asterigerina subacuta at 260-270. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, calcitized, fossiliferous (molluscan shells, echinoids, bryozoan remains and Foraminifera) ______________ 190 580 Camerina sp. at 400-410. Camerina sp., Lepidocyclina sp. at 440-450. Gypsina globula common at 460-470. Middle Eocene: Claiborne Group: Lisbon Formation: Dolomitic limestone: brown, rather massive, saccharoidal, sandy; some limestone, as above _______________ ---------------------- 20 600 Sand: medium to coarse-grained, subangular; dolomitic lime- stone, as above 30 630 12 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Limestone: cream, calcitized, somewhat nodular and loosely consolidated, granular, chalky, cherty at certain levels, fossiliferous (Foraminifera); interbedded limestone, similar to above but partially dolomitized, light-brown, saccharoidaL 690 Lepidocyclina sp. at 700-710. Discorinopsis gunteri at 810-820. Asterocyclina monticellensis at 930-940. Asterocyclina monticellensis, Lepidocyclina antillea at 10301040. Discorbis inornatus at 1060-1070. Depth (feet) 1,29C Tallahatta Formation: Dolomitic limestone: brown, saccharoidal, somewhat cherty, gypsiferous, glauconitic at depth; interbedded with limestone, cream, calcitized, granular, sparsely glauconitic, fossiliferous (Foraminifera) -------------------------------------------------------------- 190 Operculinoides sp., Asterocyclina sp. at 1330-1340. Lepidocyclina antillea common at 1350-1360. Lower Eocene: Wilcox Group (Undifferentiated): Limestone: white to cream, much calcitized, dense, massive, coarsely glauconitic, sandier at depth, fossiliferous at certain levels (molluscan shells and Foraminifera) _________________ 170 1,480 1,650 Paleocene: Midway Group: Clayton Formation: Indurated sand1 : fine-grained, micaceous, finely phosphatic, fossiliferous (fragments and molds of molluscan shells) 50 Limestone: gray to cream, much calcitized, dense, coarsely glauconitic, sandy, fossiliferous (fragments and molds of molluscan shells and some Foraminifera) 130 Robulus midwayensis? at 1720-1730. Robulus midwayensis at 1740-1750. 1,700 1,830 Upper Cretaceous: Providence and Ripley (Undifferentiated): Clay (or marl?): dark-brownish to bluish-gray, silty, mica- ceous, sparsely glauconitic, pyritiferous, fossiliferous at certain levels (Foraminifera) ; interbedded with thin ton- gues of sand, fine-grained, micaceous, pyritiferous 580 2,410 1This sand contains Operculinoides catenula and Pseudophragmina stephensoni in wells situated farther west, hence is tentatively placed in the Paleocene. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 13 Thickness (feet) Anomalina pseudopapillosa? at 1870-1880. Robulus navarroensis at 1890-1900. Robulus navarroensis, Globotruncana sp., Anomalina pseudopapillosa at 1940-1950. Cibicides harperi at 2030-2040. Clavulinoides trilatera, Globotruncana sp. at 2070-2080. Palmula reticulata at 2310-2320. Spiroplectammina semicomplanata at 2390-2400. Depth (feet) Cusseta and Blufftown Formations (Undifferentiated): Marl: as above but more abundantly fossiliferous ________________________ 380 Bolivinoides decorata at 2410-2420. Planulina texana at 2610-2620. 2,790 Blufftown Formation: Marl: as above but coarsely glauconitic _________ Glauconite prominent at 2790-2800. Vaginulina texana at 3050. Inoceramus prisms common to abundant at 2950-2960. 465 3,255 Eutaw Formation (Restricted) : Indurated sand: fine to medium-grained, subangular, micaceous, phosphatic, glauconitic, fossiliferous at certain levels (fish teeth and molluscan shells) ; interbedded with thin stringers of clay, dark-brownish-green, laminated, silty, micaceous -------------------------------------------------------------------------------------------- 132 3,387 Tuscaloosa Formation: Sand: fine to coarse-grained, subangular, abundantly micaceous, glauconitic at certain horizons, pyritiferous, arkosic; interbedded with relatively thin stringers of clay, darkbrown to brownish-green, somewhat laminated, silty, finely micaceous; a few thin beds of lignite __________________ _______________________ 291 Shale (or thinly laminated clay): dark-brown, laminated, silty, micaceous, lignitic, fossiliferous at certain levels (im- pressions and fragments of molluscan shells); interbedded with scattered tongues of indurated sand, fine to medium- grained, subangular, micaceous, glauconitic, fossiliferous at various levels (oyster shells) ____________________ _________________ 132 3,678 3,810 14 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: coarse-grained, subangular, abundantly micaceous, arkosic, pyritiferous; interbedded with beds of clay, darkbrownish-green with red to purple streaks (mottled), silty, micaceous, sideritic at certain horizons __________________ ___________________ 130 Depth (feet) 3,940 Lower Cretaceous? (Undifferentiated): Sand: coarse-grained, subangular to subrounded, varicolored, coarsely micaceous, arkosic; interbedded with many relatively thin stringers of clay, brick-red, silty, micaceous __________ 280 4,22( Basement Complex: Volcanic tuff 1 _________________________ 76 4,296 Summary: No samples --------------------------------- _______________________ 90 90 Miocene (undifferentiated) __________________ 170 260 Oligocene (undifferentiated) _ 130 390 Upper Eocene (Ocala limestone) __ 190 580 Middle Eocene (Lisbon formation) 710 1,290 Middle Eocene (Tallahatta formation) ____ 190 1,480 Lower Eocene (Wilcox Group, undifferentiated) ____ 170 1,650 Paleocene (Clayton limestone) __________ _ ----------------------------------------- 180 1,830 Upper Cretaceous (Providence and Ripley, undifferentiated) 580 2,410 Upper Cretaceous (Cusseta and Blufftown, undifferentiated) __ 380 2,790 Upper Cretaceous (Blufftown formation) _________________________________ 465 3,255 Upper Cretaceous (Eutaw, restricted) __________________________________ 132 3,387 Upper Cretaceous (Tuscaloosa formation) __________________________ 553 3,940 Lower Cretaceous ( ?) (undifferentiated) _ _____________ 280 4,220 Basement complex ----------- ----------------- ---------------------- 76 4,296 Location: City of Pearson Owner: No. 2 City of Pearson Driller: Merrel Gray Drilling Company Drilled: 1955 ATKINSON COUNTY Well No: GGS 425 Elev.: 2052 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Clay: red, sandy, limonitic___________________________________________________________________ 10 10 Sand: fine to coarse-grained, limonitic, with inclusions of kaolin (clay; white, somewhat sandy), and some clay as above ____ --------------------------------------------------------------------------------------------- 30 40 Clay: tan to dark-brown, sandy -------------------------------------------------------- 10 50 'Reported by Paul L. A.pplin, 1951, U.S. Geo!. Survey Circ. 91, p. 21. 2Average elevation taken from State Highway map. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA Hi Mioc~ne (Undifferentiated): Thickness (feet) Clay: pale-green, sandy, phosphatic at depth; interbedded sand ---------------------------------------------------------------------------------------------- 90 Gray phosphatic pebbles, at 60-70. Fine-grained sand, at 70-90. Fine-grained sand, at 110-140. Clay: pale-green, sandy, phosphatic; interbedded with thin beds of limestone, white, sandy; some sand as above ________________ 50 Limestone: white, sandy, phosphatic, dolomitized at depth, fossiliferous (macroshells) ____ ------------------------------------------------------- 90 Dolomitic limestone, light-brown, saccharoidal, phosphatic, at 220-280. Clay: pale-green, sandy, with some dolomitic limestone and sand as above -------------------- ------------------------------------------- 10 Depth (feet) 140 190 280 290 Oligocene (Undifferentiated): Clay: with fragments of limestone, nodular, recrystallized, calcitized, more fossiliferous with depth ___________________________ 110 400 Quinqueloculina sp. at 290-300. Quinqueloculina cf. Q. leonensis, Dictyoconus1 sp. at 300310. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: dense, much calcitized, fossiliferous (macroshells, bryozoan remains, and Foraminifera) _______ _________________ 20 420 Operculinoides cf. 0. ocalanus at 400-410. Asterocyclina nassauensis at 410-420. Limestone: softer, less calcitized than above _ Gypsina globula at 420-430. Operculinoides sp. abundant at 440-450. Pseudophragmina flintensis at 450-460. 40 460 Summary: Pliocene to Recent (undifferentiated) _____ ______ ________________ 50 50 Miocene (undifferentiated) ----------------------------------------------- ___________________ 240 290 Oligocene (undifferentiated) ----------------------------- ______________ ---------------- 110 400 Upper Eocene (Ocala limestone) ___________________ ----------------- 60 460 Potential Water-Bearing Zones: -Limestone ______________________ ---------------------- ------------------- --- ----------- ---- 'Reworked ( ? ) fossil of middle Eocene age. 160 460 16 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: City of Alma Owner: No. 1 City of Alma Driller: Gray Well & Pump Company Drilled: May 1938 BACON COUNTY Well No.: GGS 58 Elev.: 200 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Clay: red, some gray (mottled), very sandy, limonitic ________ 50 50 No samples ___________________________________ 14 64 In Miocene (Undifferentiated): Clay: pale-green, sandy, phosphatic at depth; interbedded sand and sandy limestone ________ ___________ _________ -------------- _ 296 360 Brown chert abundant at 200-210. Brown phosphatic pebbles at 210-220. Fossiliferous limestone of macroshells at 260-270. Limestone: white, sandy, fossiliferous and dolomitic at depth__ 90 450 Dolomitic limestone, brown, saccharoidal, at 400-450. Oligocene (Undifferentiated): Limestone: cream, fossiliferous Rotalia byramensis, Dictyoconus1 sp. at 450-460. 50 500 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, fossiliferous _______________________________ Operculinoides floridensis at 500-510. Bryozoan remains abundant at 520-530. Gypsina globula at 540-550. 126 626 Summary: Pliocene to Recent (undifferentiated) -------------------------------------------------- 50 50 No sampies ---------------------------------------------------------------------------------------------- 14 64 In Miocene (undifferentiated) ----------------------------------------------------------- 386 450 0 ligocene (undifferentiated) --------------------------------------------------------------- 50 500 Upper Eocene (Ocala limestone) ---------------------------------------------------------- 126 626 Potential Water-Bearing Zones: Limestone ---- --------------------------------------------------------------------------------------------- 126 626 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 17 Owner: No. 1 West Baker Elementary School Drilled: 1956 BAKER COUNTY Well No.: GGS 479 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, angular; fragments of residual limestone ----------------------------------------------------------------------------------------- 10 10 Clay: gray, tan and red, sandy, limonitic, carbonaceous; fragments of residual limestone ___________________________________ 70 80 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: dense, much calcitized, sandy, coarsely glauco- nitic, and fossiliferous at depth; some clay as above ______ 114 194 Limestone with macrofossils at 95-194. Summary: Residuum _______________ --------------------------------------------- ____________________________ 80 80 Upper Eocene (Ocala limestone) ________ ------------------------------ ______________ 114 194 Limestone Potential Water-Bearing Zones: 114 194 Location: City of Fitzgerald Owner: City of Fitzgerald Well No. 3 Driller: Layne-Atlantic Company Drilled: April 1948 BEN HILL COUNTY Well No.: GGS 154 Elev.: 357 Thickness Depth (feet) (feet) Miocene: Hawthorn Formation: Sand: fine to coarse-grained; some clay, light-gray to red (mottled) , sandy ---------------------------------------------------------------------------- 74 7 4 Clay: pale-green, sandy; some sand as above -------------------------------- 136 210 Tampa Limestone: Limestone: white, sandy, fossiliferous (macroshells and rare Foraminifera) ; some clay, light-gray, calcareous -------------------- 46 256 Sorites sp. at 240-256. 18 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness (feet) Limestone: white to light-gray, extremely dense and crystalline, cherty, sandy, fossiliferous (some echinoid and bryozoan remains and Foraminifera) -------------------------------------------------- 94 Rotalia mexicana var. at 256-263. Gypsina globula1 at 263-275. Dept! (feet) 350 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, relatively soft, somewhat calcitized and granular, fossiliferous (echinoid and bryozoan remains and Foraminifera) ------------------------- ------------------------------ ________________ 280 630 Operculinoides floridensis at 350-360. Camerina striatoreticulata at 600-615. Limestone: as above, interbedded with dolomitic (?) lime- stone, light-brown, saccharoidal ___________________ ______________ ______________ 95 725 Amphistegina pinarensis var. at 630-645. Middle Eocene(?): Claiborne Group (Undifferentiated): Limestone: cream, nodular, much calcitized, very sandy, fos- siliferous (some bryozoan remains and Foraminifera) 14 739 Lepidocyclina sp. at 725-739. Summary: Miocene (Hawthorn formation) ______________ _______________ ________________ 210 210 Miocene (Tampa limestone) ___________________ 46 256 Oligocene (undifferentiated) ___________ ------------------------------------------- 94 350 Upper Eocene (Ocala limestone) ____ --------------------------------------------------- 375 725 Middle Eocene ( ?) (Claiborne group, undifferentiated) 14 739 Limestone Potential Water-Bearing Zones: 280 630 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 19 Location: Land Lot 120, 3rd Land District Owner: No. 1 W. A. Pope Driller: W. B. Graham Drilled: 1947 BEN HILL COUNTY Well No.: GGS 160 Elev.: 3701 Thickness Depth (feet) (feet) Miocene: Hawthorn Formation: Clay: light-gray to pale-green, sandy; and sand, fine to coarse-grained _______________________ -------------------------------------------------------- 190 190 Tampa Limestone: Limestone: white, sandy, interbedded with thin stringers of sand and an occasional clay bed ____________________________ 70 260 Clay, light-gray, calcareous, at 230-340. Oligocene (Undifferentiated): Limestone: cream to white, rather dense, nodular, fossilifer- ous (some Foraminifera) ---------------------------------------------------------------- 100 360 Rotalia byramensis at 260-270. Dictyoconus2 sp. at 340-350. Upper Eocene: Jackson Group: Ocala Limestone: Limestone, as above ___ Operculinoides floridensis, Lepidocyclina sp. at 360-370. 20 380 Summary: Miocene (Hawthorn formation) __ _____________________ _________ ___________________ 190 190 Miocene (Tampa limestone) _________________ __ ______________ 70 260 Oligocene (undifferentiated) ---------------------- _-------------------------------------- 100 360 Upper Eocene (Ocala limestone) ____________________ ------------------------------------- 20 380 Limestone ____ Potential Water-Bearing Zones: 90 380 -'Elevation taken from State Highway map. Reworked ( 1) fossil of middle Eocene age. 20 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: West side of Gordon Street in Fitzgerald Owner: City of Fitzgerald Well No. 4 Driller: Layne-Atlantic Company Drilled: August 1953 BEN HILL COUNT"\ Well No.: GGS 355 Elev.: 357 Thickness Depth (feet) (feet) Miocene: Hawthorn Formation: Clay: mottled to pale yellowish-green at depth, sandy; inter- bedded sand, fine to coarse-grained, subangular, phosphatic____ 179 179 Tampa Limestone: Limestone: white, sandy, fossiliferous (macroshells at depth)____ 64 243 Oligocene (Undifferentiated): Limestone: cream, massive, dense, saccharoidal, somewhat nodular, cherty, fossiliferous (bryozoan remains, Ostracods, and Foraminifera) -------------------------------------------------------------------------- 52 295 Rotalia mexicana var., Nonion advena, Cibicides sp. at 243254. Rotalia mexicana var., Asterigerina subacuta at 261-269. Summary: Miocene (Hawthorn formation) --------------------------- -------------------------------- 179 179 Miocene (Tampa limestone) ------------------------------------------------------------------ 64 243 Oligocene (undifferentiated) --------------------------------------------------------------- 52 295 Limestone Potential Water-Bearing Zones: 52 295 Remarks: 1. Better water-bearing limestones lie below depth of 295. 2. This well reportedly was drilled to a total depth of 612. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 21 BERRIEN COUNTY Location: About halfway between Alapaha and ville, Land Lot 41, lOth Land District Owner: No. 1 L. R. King Driller: W. B. Graham Drilled: 1947 Nash- Well No.: GGS 159 Elev.: 2651 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained; and some clay, light-gray, sandy --------------------------------------------- ---------------------------------------------------- 80 80 Miocene: Hawthorn Formation: Clay: pale-green, sandy, phosphatic at depth _______________________________ 90 170 Gray phosphatic pebbles at 100. Tampa Limestone: Limestone: white, sandy, dolomitized at depth ___________ _ ______________ 147 317 Dolomitic limestone at 220-300. Elphidium sp. at 300-317. Summary: Pliocene to Recent (undifferentiated) ______ ___________________________ 80 80 Miocene (Hawthorn formation) ____________ --------------------------------------------- 90 170 Miocene (Tampa limestone) ____________ ------------------------------------------ 147 317 Potential Water-Bearing Zones: Limestone _____________________________________________________________________________________ _ 27 317 Location: Near Nashville Owner: No. 1 P. D. Fulwood Company Driller: Layne-Atlantic Company Drilled: March 1955 BERRIEN COUNTY Well No.: GGS 421 Elev.: 2401 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to coarse-grained, subangular to subrounded, limo- nitic; clay, yellow to tan, sandy __ ------------------------------------ 3 3 Clay: pale-bluish-gray with purple streaks (mottled), sandy, - limonitic -------------------------------------------------------------------------------- 'Average elevation taken from State Highway map. 11 14 22 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: fine to medium-grained, subangular to subrounded, arkosic, sparsely phosphatic --------------------------------- 50 Depth (feet) 64 Miocene (Undifferentiated): Clay: pale-brownish to yellowish-green, blocky, sandy 20 84 Limestone: white, rather dense, saccharoidal, sandy, cherty ______ 98 182 Oligocene (Undifferentiated): Limestone: white, nodular, much calcitized, somewhat sac- charoidal, fossiliferous (Foraminifera) _____ ___ __ ______________ 35 217 Quinqueloculina sp., Rotalia mexicana var. at 182-187. In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, rather soft, somewhat chalky, fossilifer- ous (bryozoan remains and Foraminifera) ____________________ 93 310 Gypsina globula at 207-228. Operculinoides sp. common at 248-269. Limestone: flat-white, much calcitized, somewhat crystalline, fossiliferous (bryozoan remains and Foraminifera) _____________ 20 330 Operculinoides sp., Lepidocyclina sp., Asterocyclina sp. at 325-330. Summary: Pliocene to Recent (undifferentiated) __________________________ 64 64 Miocene (undifferentiated) _______ __________________________ 118 182 Oligocene (undifferentiated) ________________________________________ --------------- 35 217 In upper Eocene (Ocala limestone) 113 330 Potential Water-Bearing Zones: Limestone: _________________ _ 113 330 Remarks: Quality of samples not good. Hence top of upper Eocene (Ocala limestone) not definitely determined. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 23 Location: 8 mi. south of Macon, at Avondale Owner: Cochran Flying Field (U.S. Govt.) Well No.2 Driller: Layne-Atlantic Company Drilled: May 1941 BIBB COUNTY Well No.: GGS 7 Elev.: 358 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Sand: fine to coarse-grained, angular; and some clay, dark- red, very sandy --------------------------------------------------------------------- 65 65 Clay, dark-red, very sandy at 0-15. Sand, fine to coarse-grained, angular, at 15-65. Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, angular, arkosic _ 80 145 Sand as above; interbedded with thin beds of kaolin, white to pink to red, micaceous, sandy ---------------------------------- _________________ 155 300 Sand, fine to coarse-grained at 200-220. Kaolin: white to gray to red, sandy, micaceous ____________________________ 142 442 Sand, fine to coarse-grained, at 342-353. Sand, fine to coarse-grained, at 371-375. Sand, coarse-grained, at 434-442. Sand : coarse-grained ___ --------------------------------------------------- ___________________ 54 496 Basement Complex (Undifferentiated): Crystalline rocks _____________________________________ 13 509 Summary: Upper Eocene (Barnwell formation) _ _____ __________________ _____________ 65 65 Upper Cretaceous (Tuscaloosa formation) _____________ ______________ 431 496 Basement complex (undifferentiated) _ __________________ _______________ 13 509 Potential Water-Bearing Zones: Sand: fine to coarse-grained ______ _________________ __ ------------------------------ 45 145 Sand: fine to coarse-grained __________ ______ ___ ------------------------------------ 20 220 Sand: fine to coarse-grained _______________ ---------------------------------------- 11 353 Sand: fine to coarse-grained _______________________ --------------------------------------- 4 375 Sand: fine to coarse-grained ------------------------------------- ____________________________ 6 434 Sand: fine to coarse-grained ___________________________ _______________ 48 490 24 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 8 mi. south of Macon, at Avondale Owner: No. 1 Cochran Flying Field (U. S. Govt.) Driller: Layne-Atlantic Company Drilled : 1941 BIBB COUNTY Well No.: GGS 8 Elev.: 380 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Sand: dark-red, fine to coarse-grained, argillaceous ___________________ 30 30 Upper Cretaceous: Tuscaloosa Formation: Kaolin: gray, micaceous_______________________________________________________________________ 7 37 Sand: fine to coarse-grained, interbedded with thin beds of clay --------------------------------------------------------------------------------------------------- 233 270 Sand, fine to coarse-grained at 37-74. Sand, fine to coarse-grained at 173-270. Kaolin: sandy, micaceous -------------------------------------------------------------------- 55 325 Sand: fine to coarse-grained, angular ---------------------------------------------- 50 375 Summary: Upper Eocene (Barnwell formation) -------------------------------------------------- 30 30 Upper Cretaceous (Tuscaloosa formation) ---------------------------------------- 345 375 Potential Water-Bearing Zones: Sand: fine to coarse-grained _ 37 74 Sand: fine to coarse-grained __________________ ---------------------------------------- 97 270 Sand: fine to coarse-grained ___ 50 375 Location: Few miles southwest of Macon Owner: No. 2 Macon Kraft Company Driller: Layne-Atlantic Company Drilled: August 1951 BIBB COUNTY Well No.: GGS 230 Elev.: 3251 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Sand: fine to coarse-grained, and some clay ------------------------------ 30 30 Sand, fine to medium-grained, red, argillaceous, limonitic at 0-15. Sand, fine to coarse-grained at 13-30. 'Average elevation taken from State Highway map. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 25 Upper Cretaceous: Tuscaloosa Formation: Thickness (feet) Sand: fine to coarse-grained, angular, interbedded with beds of kaolin at various levels -------------------------------------------------------------- 240 Kaolin, white, sandy, micaceous at 30-45. Sand, coarse-grained at 105-165. Kaolin, pink, sandy at 165-195. Sand, coarse-grained at 195-225. Kaolin, mottled, sandy at 225-255. Sand, fine to coarse-grained at 255-270. Depth (feet) 270 Summary: Upper Eocene (Barnwell formation) _____________________ ---------------------------- 30 30 Upper Cretaceous (Tuscaloosa formation) 240 270 Potential Water-Bearing Zones: Sand: fine to coarse-grained ------------------------------------------------------------------ 15 60 Sand: fine to coarse-grained ------------------------------------------------------------------ 60 165 Sand: fine to coarse-grained _---------------------------------------------------------------- 30 225 Sand: fine to coarse-grained _---------------------------------------------------------------- 15 270 Location: Southwest Macon, about 1.5 mi. east of Highway 11 Owner: No. 1, Strietmann Biscuit Company Driller: Layne-Atlantic Company Drilled: September 1953 BIBB COUNTY Well No.: GGS 357 Elev.: 364 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: tan to red to purple (mottled), sandy; some sand, fine to coarse grained, arkosic, limonitic ------------------------------- 41 41 Sand, fine to coarse-grained, arkosic, limonitic at 29-41. Upper Cretaceous: Tuscaloosa Formation: Clay: gray to pink to purple (mottled), sandy, micaceous, interbedded with sand, fine to coarse-grained, angular, arkosic -------------------------------------------- ----------------------------- ____________________ 203 244 Sand: fine to coarse-grained, angular, arkosic 57 301 Basement Complex (Undifferentiated): Crystalline rock -------------------------------------------------------------------- --------------- 2 303 26 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Thickness (feet) Upper Eocene (Barnwell formation) ----------"---------- 41 Upper Cretaceous (Tuscaloosa formation) __________________ 260 Basement complex (undifferentiated) ________________________________________________ 2 Deptl(feet) 41 301 303 Potential Water-Bearing Zones: Sand: fine to coarse-grained ___________________________ ______ __________ 5 92 Sand: fine to coarse-grained ___ -------------------------------------------------------------- 18 139 Sand: fine to coarse-grained _____ ------------------------------------------------------------ 20 166 Sand: fine to coarse-grained _______________ ---------------------------- --------------------- 23 194 Sand: fine to coarse-grained ___ ________________________ ------------- 5 217 Location: City of Macon Owner: No. 1, Dixie Dairies Driller: Layne-Atlantic Company Drilled: October 1953 BIBB COUNTY Well No.: GGS 361 Elev.: 305 Thickness Depth (feet) (feet) Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, angular, arkosic; some kaolin, white to pink, micaceous, sandy _-------------------------------------------------- 26 26 Sand: fine to coarse-grained, angular, with kaolin inclusions____ 100 126 Clay: gray to pink to brick-red, micaceous, sandy __ 46 172 Sand: coarse-grained, arkosic -------------------------------------- _____________________ 40 212 Sand: as above; with fragments of clay, pale-green, highly micaceous (probably weathered crystalline rock?) __________________ 37 249 Basement Complex (Undifferentiated): Crystalline rock, much weathered ____________ 4 253 Summary: Upper Cretaceous (Tuscaloosa formation) Basement complex (undifferentiated) ------------------------------------- 249 249 4 253 Potential Water-Bearing Zones: Sand: fine to coarse-grained ---------------------------------------------- ___________________ 100 126 Sand: fine to coarse-grained _______ ------------------------------------------- ______________ 40 212 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 27 Location: 0.6 mi. north of Railway Depot in Cochran, approximately 0.25 mi. east of Highway 129 in Cochran owner: No. 1, Hill Lumber Company Driller: Layne-Atlantic Company Drilled: February 1946 BLECKLEY COUNTY Well No.: GGS 106 Elev.: 364 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: pale-green to mottled, sandy, limonitic _______ Oligocene (Undifferentiated): Limestone: gray, extremely dense (silicified), very cherty Summary: Miocene (undifferentiated) ________________ Oligocene (undifferentiated) Potential Water-Bearing Zones: None observed to total depth of well; well unsuccessful. 79 79 17 96 79 79 17 96 Location: Northeastern part of city, 0.5 mi. east of Highway 129 in City of Cochran Owner: City of Cochran Well No.2 Driller: Layne-Atlantic Company Drilled: December 1949 BLECKLEY COUNTY Well No.: GGS 195 Elev.: 354 Thickness Depth (feet) (feet) Miocene and Oligocene Residuum: Clay: mottled to pale-green, sandy; some sand, fine to coarse- grained; fragments of residual limestone, much leached, cherty, fossiliferous (bryozoan remains and Foraminifera)____ 95 95 Rotalia byramensis at 0-95. In Oligocene (Undifferentiated): Limestone: white, dense (much calcitized), cherty, fossili- ferous (some bryozoan remains and impressions of mega- fossils) ----------------------------------------------------------------------------------- 4 99 28 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Upper Eocene: Jackson Group: Cooper Marl: Thickness (feet) Sand: fine to medium-grained, limey, fossiliferous (Foraminifera) --------------------------------------------------------------------- __ __________ ___ 26 Bulimina jacksonensis, Uvigerina sp. at 99-125. Depth (feet) 125 Barnwell Formation (Twiggs Clay Member): Marl: light-gray, somewhat sandy to "tight," glauconitic, fos- siliferous (Foraminifera) _______ _________________________ ____________________________ 29 154 Bulimina jacksonensis common at 125-135. Limestone: gray, dense (much calcitized), sandy, finely glau- conitic -------------------------------------------------------------------------------------------------- 5 159 Marl: light-gray, glauconitic; some limestone, cream, soft, fossiliferous (abundant bryozoan remains) __________________ 30 189 Ocala Limestone (Tivola Tongue): Limestone: cream, soft, fossiliferous (consists almost entirely of bryozoan remains) ---------------------------------------------------------------------- 9 198 Barnwell Formation (Twiggs Clay Member): Marl: light-gray, glauconitic; some limestone, cream, soft, fos- siliferous (abundant bryozoan remains) _______________ 13 211 Ocala Limestone (Tivola Tongue): Limestone: cream, soft, fossiliferous (consists almost entirely of bryozoan remains) ------------------------------- -------------------------------------- 39 250 Lepidocyclina cf. L. ocalana at 211-217. Middle Eocene: Claiborne Group: Gosport Sand: Sand: fine to medium-grained, angular _______________________________ 10 260 Lisbon Formation: Clay: light-gray, sandy, finely glauconitic, fossiliferous (some Foraminifera) ------------------------------------------------------------------------------------ 60 320 Cibicides westi at 260-320. Lower Eocene(?) and Paleocene(?) (Undifferentiated): Sand: coarse-grained; some clay, gray to pink, sandy, lignitic ------------------------------------------------------------------------------------------------ 74 394 Sand: fine to medium-grained ________ --------------------------------------------------- 16 410 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 29 Upper Cretaceous: Tuscaloosa Formation: Thickness (feet) Clay: white to gray to brick-red, sandy, lignitic, micaceous; some sand, fine to medium-grained ---------------------------------------------- 140 Sand: fine to coarse-grained; some thin stringers of clay, gray to pink, sandy, micaceous _____ ---------------------------------- 61 Depth (feet) 550 611 Summary: Miocene and Oligocene residuum --------------------------------------- 95 95 In 0 ligocene (undifferentiated) ------------------------------------------------------------ 4 99 Upper Eocene (Cooper marI) ---------------------------------------------------------------- 26 125 Upper Eocene (Barnwell formation, Twiggs clay member) __________ 64 189 Upper Eocene (Ocala limestone, "Tivola tongue") -------------------------- 9 198 Upper Eocene (Barnwell formation, Twiggs clay member) ____________ 13 211 Upper Eocene (Ocala limestone, "Tivola tongue") -------------------------- 39 250 Middle Eocene (Gosport sand) ____ --------------------------------------------------------- 10 260 Middle Eocene (Lisbon formation) ---------------------------------------------- 60 320 Lower Eocene ( ?) and Paleocene ( ?) (undifferentiated) ________________ 90 410 Upper Cretaceous (Tuscaloosa formation) __________________________ 201 611 Potential Water-Bearing Zones: Sand: fine to medium-grained ----------------------------------------- ______________ 10 260 Sand: fine to coarse-grained ------------------------------------- ---------------------------- 74 394 Sand: fine to coarse-grained ------------------------------------------------------------------ 19 534 Sand: fine to coarse-grained ------------------------------------------------------------------ 61 611 Location: At Cary Owner: No. 1 Smith Driller: H., B. Truluck Drilled: 1950 BLECKLEY COUNTY Well No.: GGS 277 Thickness Depth (feet) (feet) No samples _------------------------------------------------------------------------------------------ 25 25 In Miocene and Oligocene Residuum: Clay: light-gray to pale-green, cherty at depth; interbedded sand, fine to coarse-grained, limonitic, arkosic -------------------------- 110 135 Summary: No samples --------------------------------------------------------------------------------------------- 25 25 In Miocene and Oligocene residuum --------------------------------------------------- 110 135 30 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Potential Water-Bearing Zones: Thickness (feet) Sand : fine to coarse-grained ____ ------------------------------------------ ---------- ______ 10 Depth (feet) 135 Location: 0.25 mi. southeast of Atlantic Coast Line R.R. crossing in city of Nahunta Owner: City of Nahunta Driller: Gray Well and Pump Corporation Drilled: August 1938 BRANTLEY COUNTY Well No.: GGS 9 Elev.: 64 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, finely disseminated phosphatic grains 30 30 Clay: dark-gray, silty, micaceous 4 34 Indurated sand: fine to coarse-grained, sparsely phosphatic _ 6 40 Sand: fine to coarse-grained, rounded grains, arkosic 10 50 Limestone: light-gray to light-brown, dense (calcitized) nodu- lar, sandy, fossiliferous (casts and impressions of mega- fossils) ____ ---------------- ------------- ------------------------------------------- 10 60 Sand: fine to coarse-grained, arkosic 8 68 Miocene (Undifferentiated): Clay: dark-green, sandy, blocky; interbedded tongues of sand, fine to coarse-grained, phosphatic __ ---------------- ------------------- 358 426 Black phosphatic pebbles abundant at 150-160. Dolomitic limestone: light-brown, saccharoidal, phosphatic; interbedded beds of sand, fine to coarse-grained, phosphatic 121 547 Dolomitic limestone prominent at 426-434. Oligocene (Undifferentiated): Limestone: gray, dense (much calcitized), nodular, fossili- ferous (bryozoan remains and Foraminifera) -------------------------- 101 648 Dictyoconus1 sp. at 600-625. 'Reworked ( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 31 Summary: Pliocene to Recent (undifferentiated) _____________ Miocene (undifferentiated) ____________________________ Oligocene (undifferentiated) ------------------------------------- _______________ Thickness Depth (feet) (feet) 68 68 479 547 101 648 Potential Water-Bearing Zones : Limestone and sand ---------------------------------------------------------------------------------- 113 547 Limestone - ----------------------------------- ----------------- --------------------------- 101 648 Remarks: Samples of poor quality below 68. Location: 1.4 mi. north of Atlantic Coast Line R.R. at Waynesville, and 0.1 mi. east of county road from Waynesville to Browntown Owner: No. 1 CCC Camp (U. S. Govt.) Driller: Gray Well & Pump Corporation Drilled: August 1940 BRANTLEY COUNTY Well No.: GGS 90 Elev.: 60 Thickness Depth (feet) (feet) No samples 62 62 In Pliocene to Recent (Undifferentiated): Limestone: light-gray, dense (much calcitized), very sandy, sparsely phosphatic, fossiliferous (casts and impressions of megafossils) ________ _ ___________ 13 75 Sand: fine-grained, finely disseminated phosphatic grains_________ 10 85 Clay: gray, sandy, sparse finely disseminated phosphatic grains 15 100 Indurated sand: fine to medium-grained, somewhat argillaceous 25 125 No samples 25 150 In Miocene (Undifferentiated): Clay: dark-green, blocky, sandy, phosphatic, cherty, (at cer- tain levels) ; interbedded tongues of sand, fine to coarse- grained, phosphatic; stringers of dolomitic limestone; light- brown, saccharoidal, sandy, phosphatic _____ -------------------------------- 214 364 Dolomitic limestone prominent at 260-280. Sand prominent at 304-364. 32 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Thickness (feet) No samples --------------------------------------------------------------------------------------- 62 In Pliocene to Recent (undifferentiated)------------------------------------ 63 No samples -------------------------------------------------------------------------------------- 25 In Miocene (undifferentiated) __________ ____________ _ ______________ _ _______ 214 Depth (feet) 62 125 150 364 Potential Water-Bearing Zones: Sand: fine to coarse-grained ________________________________________________ . Sand: fine to coarse-grained _________________________ . 5 18L 60 364 Remarks: This well was reportedly drilled to a total depth of 705, hence doubtless utilizes the underlying "principal limestone aquifer." Location: 9 mi. west of Quitman Owner: No.1 M.G. Lawson Driller: Winter Hardware Company Drilled: March 1943 BROOKS COUNTY Well No.: GGS 3 Elev.: 130 Thickness Depth (feet) (feet) No samples ------------------------------------- 10 10 In Miocene (Undifferentiated): Clay: mottled, very sandy________ 50 60 Oligocene (Undifferentiated): Limestone: white, dense (calcitized), nodular, fossiliferous__________ 140 200 Dictyoconus1 sp. at 160-180. Summary: No samples _________________ ------------------------------------------------------------------------- 10 10 In Miocene (undifferentiated) ______ -------------------------------------------------------- 50 60 0 ligocene (undifferentiated) ------------------------------------------------------------------ 140 200 Limestone Potential Water-Bearing Zones: 140 200 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 33 Location: 10 mi. southwest of Quitman owner: No. 1 H. R. Garrett Driller: W. C. Littleton Drilled: 1946 BROOKS COUNTY Well No.: GGS 21 Elev.: 117 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, with inclusions of kaolin; also clay, mottled to pale-green, sandy _________ --------------------------- 85 85 Miocene (Undifferentiated): Clay: pale-green, sandy, phosphatic; interbedded at depth with limestone, white, sandy_______ --------------------------------------------- 90 175 Gray, polished, phosphatic pebbles at 85-100. Oligocene (Undifferentiated): Limestone: gray, dense (calcitized), nodular, fossiliferous_ 135 310 Quinqueloculina sp. at 175-185. Rotalia byramensis var. at 185-190. Dictyoconus1 sp. at 200-210. Dolomitic limestone, brown, saccharoidal, at 308-310. Summary: Pliocene to Recent (undifferentiated)------------------------- _______________ 85 85 Miocene (undifferentiated) __________________________________ --------------------------- __ 90 175 Oligocene (undifferentiated) ___ ___________ _ ____________ __________________ 135 310 Potential Water-Bearing Zones: Limestone _______________ -------------------------------------------- --------------------------- 135 310 Location: Quitman Owner: No. 1 Southside Consolidated School Driller: Winter Hardware Company Drilled: January 1942 BROOKS COUNTY Well No.: GGS 77 Elev.: 1802 Thickness Depth (feet) (feet) No samples___________________________________________________________________________________________ 10 10 In Pliocene to Recent (Undifferentiated): -Clay: pale-green to tan, sandy --------------------------------------------- ~Reworked(?) fossil of middle Eocene age. Average elevation taken from State Highway map. 30 40 34 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Miocene (Undifferentiated): Clay: pale-green, sandy, phosphatic_______________________________________ White, phosphatic pebbles at 40-120. Thickness Depth (feet) (feet) 80 120 Oligocene (Undifferentiated): Limestone: gray, dense (calcitized), nodular, fossiliferous Quinqueloculina sp. at 120-140. Dictyoconus1 sp. at 140-160. 40 160 Summary: No samples ----------------------------- --------------------------------------------------------- 10 10 In Pliocene to Recent (undifferentiated) ____ ---------------------------------------- 30 40 Miocene (undifferentiated) __ ____ _ ___ _ ----------------------------------- 80 120 Oligocene (undifferentiated) ____ __ _ _______ ------------------------------ 40 160 Limestone Potential Water-Bearing Zones: 40 160 BROOKS COUNTY Location: Barney Well No.: GGS 87 Owner: No.1 A. J. Folsom Driller: Winter Hardware Company Drilled: August 1942 Thickness (feet) ----------------------------------------------------- Deptb (feet) No samples __ 10 10 In Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained; inclusions of kaolin, white, sandy; some clay, light-gray__ ___ _________ _____ __________________ 90 100 In Miocene (Undifferentiated): Clay: dark-brown to pale-green; limestone, white, sandy; dolomitic limestone, brown, saccharoidal ____________________________ 120 220 Summary: No samples _________________________ ------..--------------------- _. _______________________ 10 10 In Pliocene to Recent (undifferentiated) __________......____________.,________ 90 100 Miocene (undifferentiated) .._. _.,__ 120 220 1Reworked( '!) fossil of middle Eocene- age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 35 Potential Water-Bearing Zones: Thickness (feet) Sand: fine to medium-grained 20 Limestone ---- ________________ ------------- -------------- ---------------- --------------------------- 60 Depth (feet) 100 200 Location: 2,780 ft. south, 1,570 ft. west of northeast corner of Land Lot 454, 12th Land District Owner: No. 1-B E. M. Rogers, Sr. Driller: D. E. Hughes et al Drilled: April 1949 BROOKS COUNTY Well No.: GGS 184 Elev.: 133 (derrick floor) Thickness Depth (feet) (feet) No samples _____ 690 690 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, crystalline, much calcitized, somewhat granular (in texture), fossiliferous (macroshells, echinoid and bryozoan remains, and frequent Foraminifera) 190 885 Amphistegina pinarensis var. at 730-740. Camerina striatoreticulata abundant at 830-840. Middle Eocene: Claiborne Group (Undifferentiated): Limestone: cream, considerably calcitized, granular, cherty, coarsely glauconitic at certain levels __ 500 Lower Eocene(?): Wilcox Group (Undifferentiated): Sand: fine to medium-grained, glauconitic, micaceous, pyriti- ferous; interbedded clay, dark, grayish-green, micaceous, carbonaceous, laminated ___ . ----------------------------- ___________________ 90 Sand: coarse-grained, subangular, varicolored, grains of pale-green quartz at depth ___________________________ 130 Paleocene: Midway Group: Clayton Formation: Limestone (or indurated sand) : g-ray, very sandy, glauconitic (finely disseminated), fossiliferous (Foraminifera) ________ 15 Operculinoides catenula at 1620-1630. Indurated sand: gray, fine-grained, glauconitic (finely dis- seminated) ____________________ ------ - -- ----------------------------------------- 90 Pseudophragmina stephensoni, Operculinoides catenula at 1630-1640. 1,385 1,475 1,605 1,620 1,710 36 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Clay: dark-gray to black, fissile, carbonaceous, micaceous; in- terbedded limestone, gray, sandy, coarsely glauconitic 85 Depth (feet) 1,795 Robulus midwayensis at 1780-1790. Limestone: gray, rather dense, somewhat crystalline, sandy, coarsely glauconitic, fossiliferous 100 Robulus pseudo-mamilligerus at 1790-1800. 1,895 Sand: fine to coarse-grained, angular 25 Marl: gray, somewhat indurated, chalky, fossiliferous (some Foraminifera) ; interbedded limestone, as above 300 1.920 2,220 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Marl: gray to brown at depth, chalky, glauconitic, sandy at various levels, micaceous, pyritiferous, fossiliferous (macro- shells and Foraminifera at certain horizons) 785 Glauconite common at 2220-2230. Globotruncana cretacea, Anomalina sp. at 2230-2240. Sand: fine to medium-grained, indurated, micaceous, phos- phatic, fossiliferous (macroshells) ; interbedded clay or shale, brown, micaceous, carbonaceous 130 Vaginulina texana at 3100-3110. 3,005 3,135 In Tuscaloosa Formation: Sand: fine to medium-grained, glauconitic; interbedded clay or shale, dark-gray, fissile (splintery), carbonaceous, micaceous (finely disseminated)_____ __ ---------------------------------------------- 190 Shale: dark-gray to black, carbonaceous, fissile, micaceous; interbedded sand, as above ------------------------------------------------------------ 155 Sand: fine to medium-grained, somewhat indurated, glauconitic__ 30 Shale: as above _________________________ --------------------------------------------------------- 33 Sand: fine to medium-grained, somewhat indurated, glauconitic; interbedded shale, as above ---------------------------------------------------- 67 3,325 3,480 3,510 3,543 3,610 ''" WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 37 Thickness (feet) Sand: coarse-grained, angular, arkosic, glauconitic and finergrained at certain levels; interbedded clay, green to tan to red (mottled), sandy, micaceous, sideritic at certain horizons__ 240 Sideritic nodules common at 3620-3630. Depth (feet) 3,850 Summary: No samples ------------------------ ------------------- --------------------------------- 690 In upper Eocene (Ocala limestone)___________ ______________________________ 195 Middle Eocene (Claiborne group, undifferentiated)-------------------------- 500 Lower Eocene ( ?) (Wilcox group, undifferentiated) __ 220 Paleocene (Clayton formation)__ ------------------------------------- ______ 615 Upper Cretaceous (post-Tuscaloosa, undifferentiated) _____________________ 915 Upper Cretaceous (In Tuscaloosa formation) _______________________________ 715 690 885 1,385 1,605 2,220 3,135 3,850 Limestone --------- Potential Water-Bearing Zones: 195 885 Remarks: All potential water-bearing sands below depth 1,385, probably carrying salt water, hence not suitable as sources of fresh water. Location: Quitman Owner: City of Quitman Driller: M. M. Gray Drilled: 1955 BROOKS COUNTY Well No.: GGS 469 Elev.: 1801 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Clay, mottled to pale-green to tan, sandy, limonitic; sand, fine to medium-grained; inclusions of kaolin, white, sandy, mica- ceous; some lignite____________ ____________________ 80 80 In Miocene (Undifferentiated): Clay: pale-green, sandy, cherty; limestone at depth, white, sandy, fossiliferous; dolomitic limestone, brown, saccha- roidal __________ -- - - -- - -- ---- --------- 70 150 Archaias sp. at 100-130. - Dolomitic limestone at 130-150. 'Average elevation taken from State Highway map. 38 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness (feet) Limestone: gray, dense (calcitized), nodular, fossiliferous___________ 115 Rotalia byramensis var. at 150-160. Dictyoconus2 sp. at 160-170. Miliolidae prominent at 190-200. Dentb (feet) 265 Upper Eocene(?): Jackson Group: Ocala Limestone: Dolomitic limestone: light-brown, saccharoidaL__ 39 304 Summary: Pliocene to Recent (undifferentiated) _____ In Miocene (undifferentiated) ___ Oligocene (undifferentiated) _ Upper Eocene (?) (Ocala limestone) ________________ . ---------------------- 80 80 70 150 115 265 39 304 Limestone - -- Potential Water-Bearing Zones: 115 265 BRYAN COUNTY Location: 0.5 mi. east of intersection of U.S. Highway 17 Well No.: GGS 65 on Bryan Neck Road at Richmond Hill Elev.: 14 Owner: Henry Ford Driller: W. E. Floyd, Jr. Drilled: May 1939 Thickness Depth (feet) (feet) --------------------------------------------------- Pliocene to Recent (Undifferentiated): Sand: fine-grained, finely disseminated phosphatic grains; interbedded clay, dark-gray to tan to red (mottled), some- what fissile, lignitic, micaceous _________________ 30 30 Sand: fine to coarse-grained, arkosic 10 40 No samples_ 310 350 In Miocene (Undifferentiated): Clay: dark-green, silty, phosphatic; limestone, white, very sandy, phosphatic ------------------------------------------------------------------------- 100 450 No samples _________________ 50 500 'Reworked ( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 39 In Upper Eocene: Jackson Group: Ocala Limestone: Thickne (feet} Clay: dark-brown, sandy, limonitic; residual limestone, as above 20 No samples ______________ ---------------- --------------------------------------------------------- 5 Depth (feet} 58 63 In. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: somewhat leached but soft, porous, fossiliferous (some Foraminifera) __ ____________________________________ 21 84 Carnerina cf. C. striatoreticulata at 63-84. Summary: Residuum __________________________________________________ _ No samples ----------------------------------------In upper Eocene (Ocala limestone) 58 58 5 63 21 84 Potential Water-Bearing Zones: Limestone .. ______________________________ ------------------------------------------- 21 84 Location: In Camilla Owner: No. 4 City of Camilla Driller: Layne-Atlantic Company MITCHELL COUNTY Well No.: GGS 564 Elev.: 1801 Thickness Depth (feet) (feet) Residuum: Clay: light-gray to tan to pink (mottled), very sandy, limonitic 25 25 Clay: dark-brown to olive-green, lignitic, sandy, limonitic 21 46 Limonitic bed: dark-brown, dense _ 4 50 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: yellow to tan at depth, calcitized, more calcitized and crystalline with depth, fossiliferous (macroshells, echi- noid and bryozoan remains, Ostracods, and Foraminifera) ___ 291 341 Operculina rnariannensis at 50-61. Heterostegina ocalana, Gypsina globula, Lepidocyclina sp. at 101-115. Carnerina striatoreticulata at 115-135. Arnphistegina pinarensis var. at 255-263. Lepidocyclina sp. common at 330-337. 'Average elevation based on Georgia State Highway Maps. 306 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Middle Eocene(?): Claiborne Group (Undifferentiated): Sandstone: tan, fine-grained, angular, coarsely glauconitic Thickness Depth (feet) (feet) ? 341 Summary: Residuum _____________________ _________________ _ Upper Eocene (Ocala limestone) ________ ____________________ Middle Eocene (?) (Claiborne group, undifferentiated) 50 50 291 341 ? 341 Limestone _________ Potential Water-Bearing Zones: 291 341 Location: 0.2 mi. southeast of Jenkins Quarry Owner: Test Hole Driller: Marquette Cement Company MITCHELL COUNTY Well No.: GGS 620 Elev.: 270 Thickness Depth1 (feet) (feet) In Oligocene (Undifferentiated): Limestone: white, somewhat saccharoidal, fossiliferous (Fora- minifera); some clay, pale brownish-gray, blocky, tough________ 16 Asterigerina subacuta, Siphonina advena, Lepidocyclina sp. at 16. Limestone: as above, but more calcitized, sparingly fossilifer- ous (rare Foraminifera)_______ _____ ________ _ _______________ 30 Limestone: white, much calcitized, somewhat nodular, granu- lar, porous __ _____________________ _ 60 Limestone: cream, somewhat saccharoidal, nodular, calcitized____ 78 Limestone: as above, but fossiliferous (Foraminifera) __ 93 Rotalia mexicana var. at 93. Limestone: as above 113 Limestone: as above_____ 125 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: flat-white, much calcitized, somewhat saccharoidal, fossiliferous (abundant bryozoan remains and some Fora- minifera) ----------------------------------------------------------------------------------- 132 Eponides jacksonensis, Operculina mariannensis at 132. 1 Depth below land surface of spot samples. r WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 307 Limestone: as above___ Thickness (feet) Limestone: flat-white, more calcitized than above, granular, saccharoidal, fossiliferous (bryozoan remains) _____ Depth (feet) 151 171 Summary: In Oligocene (undifferentiated) ___ _ 125 In upper Eocene (Ocala limestone) 171 Limestone Potential Water-Bearing Zones: 155 171 :Location: 10.35 mi. northwest of Uvalda (map distance), and 0.5 mi. south of McAllister Creek Owner: No.1 Hugh Peterson Driller: Dixie Well Drilling Company Drilled: September 1952 MONTGOMERY COUNTY WeB No.: GGS 319 Elev.: 133 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to medium-grained, angular, arkosic; interbedded clay, light-gray, sandy, limonitic_ 50 50 Clay: dark-green, sandy; interbedded sand, as above __ 50 100 Clay: dark-green, sandy, sandier with depth; interbedded limestone, white, somewhat calcitized and crystaiiine, sandy, fossiliferous (macroshells at depth) ; beds of sand, fine to coarse-grained, angular grains, phosphatic (at depth)_ 120 220 Macroshells at 140-150. Black phosphatic pebbles common at 160-170. Macroshe11s abundant at 200-220. Oligocene (Undifferentiated): Limestone: white to light-gray, nodular, fossiliferous (bryo- zoan remains and some Foraminifera)------------------------------------------ 20 240 Elphidium sp. at 220-230. - Pyrgo sp. at 230-240. 2Estimated from spot samples. 308 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Thickness (feet) Miocene (undifferentiated) ____ --------------------------- __________________________________ 220 Oligocene (undifferentiated) __ 20 Depth (feet) 220 240 Potential Water-Bearing Zones: Sand: fine to coarse-grained______________________________________________________ Limestone ____________________________________ ------------------------------------------------ 10 180 20 240 Location: Near Mt. Vernon Owner: No. 1 Mt. Vernon Elementary and High School Driller: M. M. Gray Drilling Company Drilled: 1955 MONTGOMERY COUNTY Well No.: GGS 450 Elev.: 228 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic; interbedded sand, fine to coarse-grained, angular, arkosic______________________________________________________ 60 60 Clay: yellowish-green, sandy, fossiliferous at depth; inter- bedded sand, fine to coarse-grained, angular, arkosic, phos- phatic at depth___________________________________________________________________ 270 330 Black phosphatic pebbles common at 200-210. Macroshells at 290-300. Oligocene (Undifferentiated): Limestone: light-gray, extremely dense, massive, cherty, sandy, sparsely phosphatic (at top), fossiliferous (some echinoid and bryozoan remains and Foraminifera, latter abundant at depth)---------------------------------------------------------------------------- 120 450 Rotalia mexicana var., Quinqueloculina sp. at 340-350. Gypsina globula1 at 360-370. Lepidocyclina1 sp., Coskinolina?l sp. at 400-410. Dictyoconus1 sp. at 440-450. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, relatively soft, somewhat calcitized and granular, nodular at certain levels, fossiliferous (echinoid and bryozoan remains and Foraminifera)__ ____________________ 50 500 Lepidocyclina2 sp. at 450-460. Lepidocyclina sp. common at 480-490. 'Reworked(?) fossil of middle Eocene age. 'Probably Lepid. chaperi. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 309 Summary: Thickness (feet) Miocene (undifferentiated) _----------------------------------------------- ______ _________ 330 Oligocene (undifferentiated) _______________ ----------------------------------- ______________ 120 Upper Eocene (Ocala limestone) _____ --------------------------------------- 50 Depth (feet) 330 450 500 Potential Water-Bearing Zones: Limestone ------- --------------------------------------------- ----------------------------------------------- 160 500 Location: Near Uvalda Owner: No.1 Uvalda Elementary School Driller: Scott Brothers Drilled: 1955 MONTGOMERY COUNTY Well No.: GGS 514 Elev.: 185 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to coarse-grained, limonitic; some clay, pale-green to red (mottled), sandy________________________________________________________________ 10 10 Clay: pale-green, sandy________________________________________________________________ 50 60 Sand: fine to medium-grained, coarser and arkosic at depth; some clay, as above_________________________________________________________________________ 20 80 Clay: pale-green, micaceous, cherty and phosphatic at depth___ 120 200 Light-brown chert common at 90-100. Fine-grained phosphatic pebbles at 100-110. Sand: fine-grained, finely phosphatic; some clay, as above 10 210 Clay: dark-green, sandy 20 230 Sand: fine to coarse-grained, arkosic ____________________________________________ 10 240 Clay: dark-green, sandier and abundantly phosphatic at depth 40 280 Clay: as above; fragments of limestone, white, weathered, macroshells --------------------------------------- ----------------------------- ----------------- 10 290 Limestone: white, sandy, phosphatic, fossiliferous_____________ 20 310 Limestone: as above; clay, pale-green, blocky, with conchoidal fracture _______________ ------------------------------------------------------------------------- 80 390 310 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: fine to coarse-grained, subangular, more indurated at depth, phosphatic, fossiliferous (a coquina at certain levels)____ 40 Depth (feet) 430 Oligocene (Undifferentiated): Limestone: light-gray, somewhat reddish-brown to cream at depth, nodular, very sandy, sparsely phosphatic, fossilifer- ous (echinoid and bryozoan remains, Ostracods, and Fora- minifera at certain levels)_ ________________ _ 90 520 Rotalia mexicana var. at 440-450. Quinqueloculina sp., Elphidium sp., Rotalia mexicana var. at 450-460. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: reddish-brown to cream, rather soft- and chalky, somewhat granular at depth, fossiliferous (common to abun- dant echinoid and bryozoan remains and Foraminifera) _________ 27 547 Camerina striatoreticulata, Lepidocyclina sp. at 520-530. Camerina striatoreticulata abundant at 530-547. Summary: Miocene (undifferentiated) Oligocene (undifferentiated) _ ________ Upper Eocene (Ocala limestone) __ 430 430 90 520 27 547 Limestone ___ _ Potential Water-Bearing Zones: 107 547 Location: Near Ailey Owner: No. 1 Ailey Elementary and High School Driller: Scott Brothers Drilled: 1955 MONTGOMERY COUNTY Well No.: GGS 515 Elev.: 253 1 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: pale-green to mottled, sandy; interbedded sand, fine to medium-grained, subangular, phosphatic __________________ _ 315 315 1Average elevation based on Georgia State Highway Maps. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 311 Oligocene (Undifferentiated): Thickness (feet) Limestone: light-gray, nodular, extremely dense and crystal- line, very sandy, somewhat cherty, sparsely phosphatic, fos- siliferous (some echinoid and bryozoan remains, and Fora- minifera) ------------------------------------------------------------------------------ 65 Rotalia mexicana var., Asterigerina sp. at 315-320. Gypsina globula2 , Quinqueloculina sp., Rotalia mexicana var., Asterigerina sp. at 320-330. Limestone: as above, but reddish-brown__ 20 Depth (feet) 380 400 Upper Eocene: Jackson Group: Ocala Limstone: Limestone: cream, rather soft and chalky, somewhat granular at depth, fossiliferous (echinoid and bryozoan remains and Foraminifera) ____ ------------------------------------------------------- _______________________ 112 512 Lepidocyclina sp. common at 400-410. Gypsina globula common at 410-420. Lepidocyclina3 sp. common to abundant at 450-460. Summary: Miocene (undifferentiated) __________ Oligocene (undifferentiated) ______ Upper Eocene (Ocala limestone) 315 315 85 400 112 512 Limestone _______ Potential Water-Bearing Zones: 132 512 Location: Approximately 6 mi. south of Soperton on U.S. Highway 221 (State Highway 56) Owner: No.1 C. H. Goff Driller: M. M. Gray Well Drilling Company Drilled: 1959 MONTGOMERY COUNTY Well No.: GGS 600 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: pale-yellowish-green with red to purple streaks (mottled), very sandy, limonitic___ 50 50 Sand: fine to medium-grained, subangular, arkosic 55 105 'Reworked ( ? ) fossil of middle Eocene age. 'Probably Lepid. chaperi. 312 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: as above but coarser-grained 45 Clay: dark-brownish to olive-green, very sandy----------------------------- 125 Sand: fine-grained, subangular___________________ 5 Sand: coarse-grained, subangular, arkosic 3 Depth (feet) 150 275 280 283 Oligocene (Undifferentiated): Limestone: light-gray, much calcitized, saccharoidal, fossil- iferous (molds and impressions of megafossils and some Foraminifera) ----------------------------------------- _________________________________________ 3 286 Quinqueloculina sp. at 280-286. Pyrgo sp., Robulus arcuato-striatus var., Reussella sp., Rotalia mexicana var., Gypsina globula\ Lepidocyclina1 sp. at 286-f!95. Limestone: cream, rather massive, much calcitized, saccha- roidal, fossiliferous (some Gastropods, echinoid and bryo- zoan remains and some Foraminifera) __ 119 405 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray to white, much calcitized, crystalline, fossiliferous (some macroshells, echinoid remains, bryozoan remains and some Foraminifera) ________ _ 150 555 Bryozoan remains common at 415-425. Lepidocyclina sp. at 425-435. Operculinoides sp. at 445-455. Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: as above but sandy_________________________________________ 70 625 Siphonina claibornensis, Cibicides pseudoungerianus var. lisbonensis, Cibicides westi at 565-585. Limestone: light-gray, massive, much calcitized, crystalline, dense, sparsely glauconitic, sparingly fossiliferous at cer- tain levels (some macroshells, echinoid and bryozoan re- mains and Foraminifera)____________________ ________________________ 20 645 Summary: Miocene (undifferentiated) Oligocene (undifferentiated) In upper Eocene (Ocala limestone) _____ _ Middle Eocene (Lisbon formation) _________ _ 283 283 122 405 150 555 90 645 Limestone ________ Potential Water-Bearing Zones: -------------- 269 555 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 313 Location: 0.5 mi. north of main entrance to Fort Benning Military Reservation, 0.2 mi. northwest of junetion of Highways 1 and 85, west side of Highway 85 Owner: No.1 W. M. McRae Driller: L. M. Gray Drilling Company Drilled: September 1951 MUSCOGEE COUNTY Well No.: GGS 235 Elev.: 2501 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: coarse-grained (up to gravel size) ; interbedded clay, brown, sandy ___________ ------------------------------------ 54 54 In Upper Cretaceous: Tuscaloosa Formation: Kaolin: gray, micaceous, sandy 5 59 Sand: fine to coarse-grained, angular, arkosic; interbedded clay, gray to red (mottled), micaceous, sandy______ 200 259 Clay: pale-green to red (mottled), sandy, micaceous; inter- bedded sand, fine to coarse-grained, angular, arkosic 117 376 Clay: brick-red, sandy, highly micaceous ______________ _ 63 439 In Basement Complex (Undifferentiated): Crystalline rock: much altered through weathering_ 6 445 Summary: Pliocene to Recent (undifferentiated)_ In Upper Cretaceous (Tuscaloosa formation) In basement complex (undifferentiated) __________________ 54 54 385 439 6 445 Potential Water-Bearing Zones: Sand: fine to coarse-grained__ Sand: fine to coarse-grained 20 149 40 239 Remarks: Driller reported "hard rock" (probably unaltered basement complex) at 445. 'Average elevation based on Georgia State Highway Maps. 314 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Few miles southwest of Fort Valley, at Fort Valley State College Owner: No.1 Fort Valley State College Driller: Layne-Atlantic Company Drilled: March 1953 PEACH COUNTY Well No.: GGS 348 Elev.: 517 Thickness Depth (feet) (feet) Paleocene: Midway Group: Clayton Formation: Clay: gray to red (mottled), sandy_____ 38 38 Upper Cretaceous: Providence Sand: Sand: coarse-grained, limonitic; clay (or kaolin), dark-brown to yellow to purple (mottled), sandy, micaceous_ 7 45 Kaolin: cream, micaceous, sandy________ 20 65 Sand: coarse-grained, angular; some kaolin, light-gray, mica- ceous 20 85 Kaolin: light-gray, micaceous__ 20 105 Sand: fine to coarse-grained; some kaolin, white to red (mottled), micaceous _____ ____________________________ 20 125 Sand: coarse-grained, angular, limonitic 23 148 Ripley and Cusseta (Undifferentiated): Clay: light-gray to yellow, micaceous, sandy _ 6 154 Sand: fine to medium-grained; some clay, as above _ 16 170 Sand: fine to medium-grained; interbedded kaolin, white to gray to red (mottled), micaceous, sandy____ ____________________ 45 215 Blufftown and Eutaw (Undifferentiated): Sand: fine to coarse-grained, angular, limonitic; interbedded clay (or kaolin), gray to black, micaceous, lignitic 110 325 Black, lignitic clay prominent at 225-245. Tuscaloosa Formation: Sand: fine to coarse-grained, angular, limonitic, rather mas- sive; interbedded clay (or kaolin), gray to red (mottled), micaceous, sandy ---- -------------------------- ------------------------- -- ------------------ 170 495 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 315 Summary: Thickness (feet) Paleocene (Clayton formation)______ _______________________ _ 38 Upper Cretaceous (Providence sand)______ _____________________________________ 110 Upper Cretaceous (Ripley and Cusseta, undifferentiated) ______________ 67 Upper Cretaceous (Blufftown and Eutaw, undifferentiated) ____ 110 Upper Cretaceous (Tuscaloosa formation)__ _____________________ 170 Depth (feet) 38 148 215 325 495 Potential Water-Bearing Zones: Sand: fine to coarse-grained 35 140 Sand: fine to medium-grained__ _ 30 205 Sand: fine to coarse-grained________________________ 75 300 Sand: fine to coarse-grained_ __ 55 415 Sand: fine to coarse-grained ____________________ 30 455 Sand: fine to coarse-grained _ __________________________________________________________ 15 487 Location: In Fort Valley Owner: No. 4 City of Fort Valley Driller: Layne-Atlantic Company Drilled: January 1954 PEACH COUNTY Well No.: GGS 369 Elev.: 5251 Thickness Depth (feet) (feet) Paleocene: Midway Group: Clayton Formation: Clay: brick-red, very sandy, limonitic, and scattered frag- ments of residual limestone________________________________________________ 24 24 Sand: fine to coarse-grained, angular___ No samples ___________ __________________________ 8 32 3 35 In Upper Cretaceous: Providence Sand: Kaolin: white, micaceous, sandy Sand: fine to coarse-grained__ 13 48 72 120 In Ripley and Cusseta (Undifferentiated): Clay: gray to red (mottled), micaceous, sandy_____ 90 210 In Blufftown and Eutaw (Undifferentiated): Sand: fine to coarse-grained; clay, gray, very micaceous Clay: gray, silty, very micaceous_______________ Sand: fine to coarse-grained; some clay, as above __ 'Average elevation based on Georgia State Highway Maps. 24 234 16 250 30 280 316 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Tuscaloosa Formation: Thickness (feet) Sand: fine to coarse-grained, arkosic; some clay (or kaolin), gray to pink (mottled), micaceous, sandy___ 35 No samples_ 11 Sand: coarse-grained, arkosic____________________ 34 No samples_ 36 Sand: fine to coarse-grained__________________ 109 Clay: gray to brick-red, very micaceous, sandy_ 12 Depth (feet) 315 326 360 396 505 517 Summary: Paleocene (Clayton formation)_____________________ __ _______ ________________ 32 32 No samples ------------------------------------------------------------------------- ------------------------ 3 35 In Upper Cretaceous (Providence sand)---------------------------------------------- 85 120 In Upper Cretaceous (Ripley and Cusseta, undifferentiated)__________ 90 210 In Upper Cretaceous (Blufftown and Eutaw, undifferentiated)____ 70 280 Upper Cretaceous (Tuscaloosa formation)_____ ______________ 237 517 Potential Water-Bearing Zones: Sand: fine to coarse-grained_______________ 25 145 Sand: fine to coarse-grained______ ______________ 30 190 Sand: fine to coarse-grained_________________________________ ___ __ __ _____ 20 230 Sand: fine to coarse-grained__ ________ ________________________ ___ ______ ___ _ 40 320 Sand: fine to coarse-grained ---------------------------- ------------------- ____ Sand: fine to coarse-grained_______________________________ 40 410 25 480 Remarks: Overall quality of samples poor. Potential water-bearing zones selected from electric log of well. Location: 1.0 mi. northeast of Central of Georgia R.R. Station, in Fort Valley Owner: No.1 Atlantic Ice Company Driller: Layne-Atlantic Company Drilled: April 1955 PEACH COUNTY Well No.: GGS 426 Elev.: 5251 Thickness Depth (feet) (feet) Paleocene: Midway Group: Clayton Formation: Clay: brick-red, sandy, limonitic______________________________________________________ 20 20 1Average elevation based on Georgia State Highway Maps. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 317 Upper Cretaceous: Providence Sand: Kaolin: white to red (mottled), sandy______________ Sand: fine to coarse-grained; some clay, as above Kaolin: white to red (mottled), very sandy___________________________ Sand: fine to medium-grained, angular, limonitic, arkosic_ Clay: mottled, very sandy___ Thickness Depth (feet) (feet) 10 30 25 55 7 62 13 75 17 92 Ripley and Cusseta (Undifferentiated): Clay: light tan, sandy_____________ ------------------------------------------------- 16 108 Sand: fine to coarse-grained, angular; some clay, as above 39 147 Sand: fine to coarse-grained, angular, limonitic, arkosic ________ 33 180 Blufftown and Eutaw (Undifferentiated): Clay: dark-gray to black, sandy, very micaceous __ Sand: fine to coarse-grained, angular, arkosic ____ Clay: light-gray to red (mottled), very sandy Sand: fine to coarse-grained, angular, arkosic _____ 5 185 25 210 7 217 18 235 In Tuscaloosa Formation: Sand: fine to coarse-grained, angular, arkosic; some clay, red, micaceous ___ 68 303 Sand: fine to coarse-grained, angular, arkosic; interbedded clay (or kaolin), white to red (mottled), micaceous, sandy 102 405 Clay: gray to brick-red, micaceous, sandy_________________________ 25 430 Sand: fine to coarse-grained, angular, arkosic; interbedded thin stringers of clay (or kaolin), gray to red (mottled), micaceous, sandy ___ ______________________________ _ 71 501 Summary: Paleocene (Clayton formation)___ ___________________________ 20 20 Upper Cretaceous (Providence sand)---------------------------------------------------- 72 92 Upper Cretaceous (Ripley and Cusseta, undifferentiated) ________ 88 180 Upper Cretaceous (Blufftown and Eutaw, undifferentiated) ___ 55 235 In Upper Cretaceous (Tuscaloosa formation) __________________________ _ 266 501 Potential Water-Bearing Zones: Sand: fine to coarse-grained_____ Sand: fine to coarse-grained 67 175 25 210 318 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: fine to coarse-grained_______ ------------------------------------------------------- 13 Sand: fine to coarse-grained____________________________________________________________________ 92 Sand: fine to coarse-grained__________________________________________________________ 47 Sand: fine to coarse-grained____________________________________________________ 37 Sand: fine to coarse-grained_____ ________________ 25 Depth (feet) 230 337 405 467 495 Location: 1.5 mi. east of Offerman, Land Lot 329, 4th Land District Owner: No. 1 Adams-McCaskill Driller: W. B. Hinton Drilled: May 1938 PIERCE COUNTY Well No.: GGS 119 Elev.: 75 Thickness Depth (feet) (feet) No samples __ 120 120 In Miocene (Undifferentiated): Sand: fine to coarse-grained; limestone, white, rather dense (much calcitized), sandy, phosphatic __ ________ __________ _ 360 480 Sand and limestone: as above; dolomitic limestone, light- brown, saccharoidal 105 585 Oligocene (Undifferentiated): Sand and limestone: as above with more limestone at depth, light-gray to white at depth, much calcitized, nodular, sac- charoidal, fossiliferous (macroshells and Foraminifera) ____ 15 600 Quinqueloculina sp. at 585-600. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white to cream, sandier more calcitized and dolo- mitized at depth, fossiliferous (bryozoan and echinoid re- mains, some macroshells, and Foraminifera) _ _________ __________ 265 865 Bryozoan remains prominent at 600-630. Came1ina sp. at 675-690. Operculinoides floridensis, Lepidocyclina sp. at 690-705. Asterocyclina nassatwnsis at 705-720. Gypsina globula, Pseudophragmina flintensis at 720-735. Camerina striatoreticulata common at 735-750. Operculina mariannensis at 765-780. Limestone as above but much sandier at 780-810. Limestone as above but more dolomitized with depth at 810865. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 319 Middle Eocene: Claiborne Group (Undifferentiated): Thickness (feet) Depth (feet) Sand: fine to coarse-grained, phosphatic; dolomitic limestone, as above __________________ 135 1,000 Limestone: light-gray, massive, dense, much calcitized, some- what sandy, cherty (at certain horizons), fossiliferous (fragments and molds of macroshells, a coquina at certain horizons, bryozoan remains, and Foraminifera) 200 1,200 Asterocyclina monticellensis at 1085-1100. Lepidocyclina (Polylepidina) antillea at 1100-1115. Bryozoan remains prominent at 1115-1130. Dolomitic limestone: brown, saccharoidal; interbedded limestone, as above________________________________________________________ ___________________________ 170 1,370 Limestone: cream, poorly consolidated, granular, somewhat calcitized, cherty and gypsiferous at certain horizons, fos- siliferous (some Foraminifera at certain levels) 390 1,760 Operculinoides sp., Asterocyclina sp. prominent at 1490-1505. Dolomitic limestone: light-gray, saccharoidal, gypsiferous 120 Sand: fine to coarse-grained, phosphatic 15 Limestone: cream, granular, somewhat calcitized, coarsely glauconitic, dolomitized at certain horizons, fossiliferous (abundant bryozoan remains) ; interbedded sand, fine to medium-grained, phosphatic __ ___ ___ __ ______________ 75 Clay: yellowish-green, fissile, silty, micaceous 85 Marginulina sp. at 2000-2015. Cibicides tallahattensis at 2015-2030. 1,880 1,895 1,970 2,055 Lower Eocene: Wilcox Group (Undifferentiated): Limestone: light-gray, sandy, coarsely glauconitic 30 Marl: dark-gray, fissile, sandy, glauconitic, micaceous, pyritiferous, fossiliferous (Foraminifera) ___________________________________________ 35 Limestone: white, sandy, coarsely glauconitic, fossiliferous (fragments and molds of macroshells) __________ ----------------------------- 15 Sand: fine to coarse-grained, sub angular, phosphatic__________ 90 Eponides dorfi, Valvulineria wilcoxensis at 2090-2105. Alabamina wilcoxensis at 2120-2135. 2,085 2,120 2,135 2,225 320 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Palocene: Midway Group: Clayton Formation: Thickness (feet) Limestone: white, dense, much calcitized and crystalline, fos- siliferous (macroshells, bryozoan remains, Ostracods, and some Foraminifera) ; interbedded clay, dark-gray to black, fissile, carbonaceous, micaceous (fine 1y disseminated flakes), fossiliferous, (some Foraminifera) 75 Indurated sand: dark-gray to brown, fine-grained, phosphatic, glauconitic, micaceous, fossiliferous (macroshells, Ostra- cods, and Foraminifera at certain levels); interbedded marl, brown to dark-gray, silty, glauconitic, micaceous, fos- siliferous (Foraminifera at various levels) 420 Discorbis -midwayensis var. at 2300-2315. Eponides lotus at 2322-2330. Va,ginulina longiforma at 2390-2405. Depth (feet) 2,300 2,720 Upper Cretaceous: Post Tuscaloosa (Undifferentiated): Marl: dark-brown to bluish-gray, sandy, micaceous, pyriti- ferous, glauconitic, fossiliferous (macroshells, Ostracods, and Foraminifera) ____________ _ 495 Globotruncana sp. at 2720-2735. Globotruncana sp., Guembelina sp., Gaudryina sp. at 27502765. Marl: brown, fissile, silty, glauconitic, carbonaceous, mica" ceous, fossiliferous (macro- and microfossils) ____ ____________________ 525 Plamtlina cf. P. texana, Globorotalia micheliniana at 33803395. Planulina taylorensis at 3455-3470. Kyphopyxa christneri at 3560-3575. Vaginulina texana at 3695-3710. Sand: fine to coarse-grained, phosphatic, indurated at cer- tain horizons; interbedded marl, as above 135 3,215 3,740 3,875 Tuscaloosa Formation: Clay: gray to dark-green, fissile, sandy, finely micaceous, somewhat iron-stained; interbedded sand, fine to coarse- grained __ 75 Sand: fine to coarse-grained; interbedded clay, as above 255 Siderite nodules prominent at 3965-3980. Sand: fine to medium-grained, somewhat indurated, finely glauconitic, micaceous, fossiliferous (macroshells) _________________ 41 3,950 4,205 4,246 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 321 Lower Cretaceous (?) (Undifferentiated) : Thickness (feet) Sand: fine-grained, highly micaceous; interbedded clay, green to red, sandy, micaceous _______________ ___________________ 102 Depth (feet) 4,348 Basement Complex (Undifferentiated): Crystalline rock 27 4,375 Summary: No samples ________ 120 In Miocene (undifferentiated) 465 Oligocene (undifferentiated) ____ _ 15 Upper Eocene (Ocala limestone) 265 Middle Eocene (Claiborne group, undifferentiated) - ---- ______ 1,190 Lower Eocene (Wilcox group, undifferentiated) 170 Paleocene (Clayton formation) ______ --------------- 495 Upper Cretaceous (post-Tuscaloosa, undifferentiated) --- ____ 1,155 Upper Cretaceous (Tuscaloosa formation) 371 Lower Cretaceous(?) (undifferentiated) 102 Basement complex (undifferentiated) 27 120 585 600 865 2,055 2,225 2,720 3,875 4,246 4,348 4,375 Potential Water-Bearing Zones: Limestone _______________ __ __ Sand: fine to coarse-grained _ Limestone ------------------------------------Sand: fine to coarse-grained _ 220 820 135 1,000 200 1,200 65 2,200 Location: 2.3 mi. northeast of Offerman, Land Lot 332, 4th Land District Owner : No. 1 Donald Clark Driller: W. B. Hinton Drilled: May 1939 PIERCE COUNTY Well No.: GGS 120 Elev.: 75 Thickness Depth (feet) (feet) Summary: No samples ------------------------------------------------------------------------------------------------ 111 In Miocene (undifferentiated) _____ _ _-------------------------------------------- 539 Oligocene (undifferentiated) ___ -------------------- 51 Upper Eocene (Ocala limestone) -------------------------------- ------------------------- 174 Middle Eocene (Claiborne group, undifferentiated) _____________________ 1,220 Lower Eocene (Wilcox group, undifferentiated) _______________________ 290 111 650 701 875 2,095 2,385 322 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Paleocene (Clayton formation) ________________________ Cretaceous (undifferentiated) _____ ______________ First observed Globotruncana sp. at 2747-2778. First observed Anomalina henbesti at 3322-3353. First observed Planulina texana at 3414-3444. First observed Kyphopyxa christneri at 3444-3474. First observed V aginulina texana at 3598-3629. Basement complex (undifferentiated) Thickness (feet) 365 -- ________ 1,598 Depth (feet) 2,750 4,348 7 4,~55 Remarks: Samples of poor quality. Formational tops noted above are approximate. Location: In Patterson Owner: No. 1 J. C. Echols Driller: Layne-Atlantic Company Drilled: 1955 PIERCE COUNTY Well No.: GGS 465 Elev.: 1051 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, finely disseminated phosphatic grains; interbedded clay, gray to tan to purple (mottled), sandy ____ ------------------- 30 30 Sand: fine to coarse-grained, angular, arkosic _ 115 145 In Miocene (Undifferentiated): Clay: dark-green, sandy, phosphatic; interbedded sand, fine to coarse-grained __ 50 195 Black, phosphatic pebbles prominent at 165-175. Clay: dark-green, sandy, phosphatic ___ 115 310 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; some limestone, white, dense, much calcitized, sandy__ 20 330 Sand: fine to coarse-grained, phosphatic __ 80 410 Limestone: white, dense, much calcitized, sandy, phosphatic; interbedded sand, fine to coarse-grained, phosphatic; dolo- mitic limestone, light-brown, saccharoidal, sandy, phos- phatic; clay, dark-green, sandy, phosphatic _ _______ ______ 80 490 1Average elevation based on Georgia State Highway Maps. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 323 Thickness (feet) Limestone: white, dense, much calcitized, phosphatic, fossili- ferous (casts and molds of megafossils) 68 Dolomitic limestone: dark-brown, saccharoidal, sandy, phosphatic, fossiliferous (molds and impressions of megafossils)__ 42 Depth (feet) 558 600 Oligocene (Undifferentiated): Limestone: cream, recrystallized (much calcitized), nodular, somewhat oolitic?, fossiliferous (Foraminifera) _________________ 20 620 Dictyoconus2 sp., Quinqueloculina sp. at 600-620. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray to white, extremely dense (much cal- citized), fossiliferous (echinoid and bryozoan remains and Foraminifera) __ _ ____________________ _ 48 668 Operculinoides sp. at 620-640. Operculinoides ocanalus, Asterocyclina nassauensis, Pseudophragmina flintensis, Gypsina globula, Argyrotheca sp. at 660-668. Summary: Pliocene to Recent (undifferentiated) In Miocene (undifferentiated) Oligocene (undifferentiated) __ Upper Eocene (Ocala limestone) 145 145 455 600 20 620 48 668 Potential Water-Bearing Zones: Sand: fine to coarse-grained ___ Limestone ______________ ---------------------------- __________________________________________________ 80 410 68 668 Location: Owner: No. 1 Pierce County Training School Driller: M. M. Gray Drilling Company Drilled: 1956 PIERCE COUNTY Well No.: GGS 516 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to coarse-grained, arkosic, with kaolin inclusions 20 20 Clay: light-gray to red (mottled), sandy _ 10 30 'Reworked(?) fossil of middle Eocene age. 324 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: very coarse-grained, angular, arkosic; some clay, as above 10 Depth (feet) 40 Miocene (Undifferentiated): Clay: yellowish-green, sandy, finely disseminated phosphatic grains 20 60 Sand: fine to coarse-grained, angular, phosphatic, arkosic. 10 70 Clay: yellowish-green, sandy 10 80 Sand: fine to coarse-grained, arkosic 50 130 Black, phosphatic pebbles prominent at 120-130. Clay: dark-green, sandy, phosphatic 50 180 Sand: fjne to coarse-grained, phosphatic 100 280 Clay: dark-green, sandy, phosphatic _ 100 380 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; interbedded sand, fine to coarse-grained, phos- phatic; clay, dark-green, sandy, phosphatic _ 80 460 Dolomitic limestone: as above 40 500 Oligocene (Undifferentiated): Limestone: cream, dense (much calcitized), fossiliferous (molluscan remains and abundant Foraminifera) 145 645 Dictyoconus1 sp. and abundant fossils belonging to the family Miliolidae at 500-510. Summary: Pliocene to Recent (undifferentiated) Miocene (undifferentiated) ______ _ Oligocene (undifferentiated) _____ 40 40 460 500 145 645 Potential Water-Bearing Zones: Sand: fine to coarse-grained ---------------------------------------------------- ____ 50 130 Sand: fine to coarse-grained ----------------------------------------------------- 100 280 Limestone ________ ----------------------------------------------------------------------------------------- 145 645 'Reworked ( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 325 PULASKI COUNTY Location: Near east end of bridge over Ocmulgee River, 34 yd. northeast of R.R., 40 ft. southwest of dwelling in Hartford Owner: No. 1 J. D. Lytle Driller: H.'IIB. Truluck Drilled: September 1951 Well No.: GGS 237 Elev.: 230 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, argillaceous, brick-red, cherty, and fragments of residual limestone ____ __________ _____ 40 40 Upper Eocene: Jackson Group: Cooper Marl: Marl: cream, very sandy, fossiliferous (echinoid and bryozoan remains and Foraminifera)__ __ _ __ _________ _________________ 10 50 Robulus alato-limbatus, Eponides jacksonensis, Planulina cooperensis at 40-50. Barnwell Formation: Limestone: gray, rather crystalline and saccharoidal, coarse- ly glauconitic; some marl, silty, carbonaceous 10 60 Marl: gray, silty, carbonaceous, somewhat indurated, fos- siliferous (Foraminifera) ___ _______ ____________ 30 90 Limestone: gray, fossiliferous (abundant bryozoan remains and Foraminifera at depth) _ ___ ______ __ 40 130 Operculinoides sp., Asterocyclina sp. at 100-110. Sand: fine to coarse-grained, angular 30 160 Summary: Residuum _____ _______________________________________ Upper Eocene (Cooper marl) Upper Eocene (Barnwell formation) ________ 40 40 10 50 110 160 Potential Water-Bearing Zones: Limestone Sand: fine to coarse-grained __ 40 130 30 160 326 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 PULASKI COUNTY Location: 0.35 mi. east of Ocmulgee River, 150 ft. south of R.R., 40 ft. south of dwelling in Hartford Owner: No.1 Fred E. Thompson Driller: H. B. Truluck Drilled: September 1951 Well No.: GGS 238 Elev.: 239 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, argillaceous, brick-red, limo- nitic, cherty, and fragments of residual limestone 50 50 Rotalia mexicana var. at 20-30. Upper Eocene: Jackson Group: Cooper Marl: Marl: cream, very sandy, fossiliferous (echinoid and bryozoan remains and Foraminifera) 10 60 Eponides jacksonensis, Eponides cocoaensis, Planulina cooperensis at 50-60. Barnwell Formation: Marl: gray, silty, fossiliferous (echinoid and bryozoan re- mains and Foraminifera); with thin beds of limestone ... 40 100 Limestone: gray, rather porous, fossiliferous (megafossils, echinoid and bryozoan remains and Foraminifera) 40 140 Abundant echinoid and bryozoan remains at 100-110. Robulus limbosus var., Gypsina globula at 110-120. Operculinoides sp., Lepidocyclina sp. at 120-130. Eponides jacksonensis, Operculina mariannensis at 130-140. Sand: fine to coarse-grained, angular 10 150 Summary: Residuum Upper Eocene (Cooper marl) Upper Eocene (Barnwell formation) Potential Water-Bearing Zones: Limestone Sand: fine to coarse-grained 50 50 10 60 90 150 40 140 10 150 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 327 PULASKI COUNTY Location: 2 mi. northwest of Hawkinsville city limits, north side of U.S. Highway 341 Owner: No. 1 T. M. Linder Driller: H. B. Truluck Drilled: 1951 Well No.: GGS 242 Elev.: 321 Thickness Depth (feet) (feet) Residuum: Clay: mottled, sandy, limonitic, and fragments of residual limestone __ __________ _________________________ __ ________ _____________________ _________________ 85 85 Rotalia mexicana var., Quinqueloculina sp. at 0-10. Upper Eocene: Jackson Group: Cooper Marl: Marl: gray, silty, fossiliferous (echinoid and bryozoan re- mains and some Foraminifera) 25 110 Valvulineria jacksonensis at 90-100. Residuum _____ Upper Eocene (Cooper inarl) Summary: 85 85 25 110 Potential Water-Bearing Zones: None observed to total depth (110). However, aquifers may be found beneath this well at various levels below 110. PULASKI COUNTY Location: South side of junction of Highways 341 and Well No.: GGS 256 129, 100 yd. west of historical marker in Hartford Elev.: 235 Owner: No.1 Harry Cravey Driller: H. B. Truluck Thickness Depth (feet) (feet) -----~------- Residuum: Sand: fine to coarse-grained, argillaceous, limonitic, cherty, and scattered fragments of residual limestone 30 30 Upper Eocene: Jackson Group: Cooper Marl: Marl: cream, very sandy, fossiliferous (Foraminifera) 20 50 Bulimina jacksonensis, Eponides jacksonensis, Planulina cooperensis at 30-40. 328 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Barnwell Formation: Thickness (feet) Marl: gray, silty, fossiliferous (echinoid and bryozoan re- mains, and Foraminifera); interbedded limestone, cream, glauconitic _________________ _ 60 Textularia hockleyensis at 90-100. Limestone: cream, fossiliferous (echinoid and bryozoan re- mains and Foraminifera) 30 Abundant bryozoan remains at 110-120. Lepidocyclina sp. at 130-140. Sand: fine to coarse-grained, angular _ 10 Depth (feet) 110 140 150 Summary: Residuum ________________________________________ Upper Eocene (Cooper marl) ____ Upper Eocene (Barnwell formation) __ 30 30 20 50 100 150 Potential Water-Bearing Zones: Limestone ________ Sand: fine to coarse-grained _ 30 140 10 150 PULASKI COUNTY Location: Near Ocmulgee River in Hawkinsville Well No.: GGS 339 Owner: No. 1 Opelika Mfg. Company Elev.: 245 Driller: Virginia Supply and Well Company Drilled: March 1953 Thickne Depth -------------------------------------------------(-fe-et-) (feet) Residuum: Sand: fine to coarse-grained, subangular, limonitic ________________ _ 5 5 Clay: brown to olive-green, somewhat mottled, sandy, limo- nitic; fragments of residual limestone, yellow, much leach- ed, sandy, fossiliferous (some Foraminifera) 20 25 Quinqueloculina sp., Rotalia mexicana var., Asterigerina subacuta at 5-25. Upper Eocene: Jackson Group: Cooper Marl: Sand: fine to coarse-grained, subangular, coarsely glauco- nitic, fossiliferous (some Foraminifera) ___ _ 5 30 Reussella eocena, Bulimina jacksonensis at 25-30. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 329 Thickness (feet) Limestone (or indurated sand?): white to yellow, abundantly arenaceous, fossiliferous (some Foraminifera) ________________________ 15 Lepidocyclina sp., Alabamina atlantisae, Cibicides sp. at 30-45. Depth (feet) 45 Barnwell Formation: Marl: light-gray, sandy, glauconitic, fossiliferous (carrying bryozoan and echinoid remains, Ostracods, and Foramini- fera) ; interbedded limestone, light-gray, much calcitized, crystalline, sandy, glauconitic, fossiliferous (fragments and molds of megafossils) _ __ _________________________ 56 101 Textularia hockleyensis, Robulus alato-limbatus, Dentalina jacksonensis, N onion advena, Discorbis assulata, Discorbis cf. D. subaraucana, Nodosaria fissicostata, Guttulina irregularis, Sigmomorphina jacksonensis, Valvulineria jacksonensis, Cibicides danvillensis, Planulina cocoaensis at 45-55. Limestone: gray, crystalline, somewhat saccharoidal, fossili- ferous (macroshells, echinoid and abundant bryozoan re- mains, and Foraminifera) ______________ __________ _________________ 39 140 Gypsina globula, Lepidocyclina sp., Asterocyclina sp., Operculina mariannensis at 120-140. Sand: medium to coarse-grained 10 150 Middle Eocene: Claiborne Group: Lisbon Formation: Marl: gray, silty, fossiliferous (macroshells and Foramini- fera) ; interbedded sand, fine to coarse-grained, angular, glauconitic, at depth, fossiliferous (macroshell coquina) 109 259 Cibicides westi at 172-175. lVIacroshells common at 187-207. Glauconite prominent at 231-247. Limestone: gray, dense, crystalline, sandy, glauconitic, inter- bedded marI as above __ ____ ___ _______________________________________________________ 20 279 Pink, sericitic clay prominent at 259-265. Tallahatta Formation: Clay: dark-brown, somewhat fissile, glauconitic, lignitic; in- terbedded sand, fine to coarse-grained _-------------------------------------- 40 319 330 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Residuum -------------------------------- --------------------------------Upper Eocene (Cooper marl) ____________________ Upper Eocene (Barnwell formation) Middle Eocene (Lisbon formation) _____ Middle Eocene (Tallahatta formation) _ Thickness Depth (feet) (feet) 25 25 20 45 105 150 129 279 40 319 Potential Water-Bearing Zones: Limestone ______________________ ------------------------------------------------ Sand: medium to coarse-grained _____ ______________ _ Sand: fine to coarse-grained __ Sand: fine to coarse-grained _____________ Sand: fine to coarse-grained ____________________________ 39 140 10 150 13 220 16 247 31 316 Remarks: Limestones belonging to the Claiborne group are too dense and nonporous to constitute good water-bearing fo:r;mations. The more productive water-bearing sands for the area lie below the total depth (319) penetrated by this well. Such aquifers are of Upper Cretaceous age. PULASKI COUNTY Location: 4 mi. south of Pulaski-Bleckley County line, east side of U.S. Highway 26, Land Lot 306, 21st Land District Owner: No. 1 E. H. Tripp Driller: Ainsworth, Inc. Drilled: October 1954 Well No.: GGS 472 Elev.: 280 Thickness Depth (feet) (feet) Residuum: Clay: mottled, very sandy, limonitic, and fragments of resi- dual limestone (at depth) ____________ _ 80 80 Rotalia mexicana var. at 70-80. Oligocene (Undifferentiated): Limestone: yellow, nodular, somewhat iron-stained, leached, cherty, fossiliferous (echinoid and frequent bryozoan re- mains, and some Foraminifera) _ 20 100 Asterigerina sp., Eponides byramensis at 100-110. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 331 Upper Eocene: Jackson Group: Cooper Marl: Thickness (feet) Limestone: cream, granular, loosely consolidated (gray, dense, somewhat saccharoidal, sandy, coarsely gla'Uconitic at depth), fossiliferous (echinoid and bryozoan remains, Os- tracods, and Foraminifera) _______________ _ 15 Depth (feet) 115 Bulimina jacksonensis, Uvigerina jacksonensis, Uvigerina topilensis, Spiroplectammina mississippiensis var., Cibicides lobatulus at 110-120. Indurated sand: fine-grained, angular, fossiliferous (casts and molds of megafossils) _______________ _ 20 135 Barnwell Formation: Marl: gray, silty, somewhat indurated, carbonaceous, fossili- ferous (echinoid and bryozoan remains, Ostracods and Foraminifera) _______________________________________________________ 40 175 Nonion advena, Valvulineria jacksonensis at 150-160. Limestone: gray, dense, coarsely glauconitic, sandy, fossili- ferous (casts and molds of megafossils, echinoid and abun- dant bryozoan remains) _______________________ __________________ 35 210 Limestone: cream, porous, coarsely glauconitic, sandier with depth, fossiliferous (echinoid and abundant bryozoan re- mains, and Foraminifera)___ _________________________________________________ 45 255 Operculina mariannensis, Lepidocyclina ocalana at 210-220. Asterocyclina na.ssauensis, Camerina striatoreticulata at 220-230. Middle Eocene: Claiborne Group: Lisbon Formation: Marl: gray to dark-green, somewhat indurated, carbonaceous, micaceous, glauconitic (finely disseminated) ; interbedded limestone, gray, dense, sandy, glauconitic (finely dissemi- nated) ; sand, fine to coarse-grained, angular, fossiliferous (a coquina) __________ ---- ----------- --- ---- - 125 380 Macroshells prominent at 255-280. Nonion advena, Gryoidina soldanii var., Cibicides danvillensis, Cibicides americanus var., Cibicides pseudoungerianus var. lisbonensis, Cibicides mississippiensis, Cibicides westi at 280-290. Pink sericitic clay prominent at 360-370. 332 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Tallahatta Formation: Thickness (feet) Marl: dark-green, sandy, coarsely glauconitic, pyritiferous, fossiliferous (macroshells, Ostracods and Foraminifera) 70 Cibicides blanpiedi, Cibicides tallahattensis at 390-400. Asterocyclina monticellensis, Cibicides pseudoungerianus var. lisbonensis, Cibicides blanpiedi, Cibicides tallahattensis at 400-410. Depth (feet) 450 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Sand: fine to medium-grained, angular, sideritic, lignitic; in- terbedded clay, black, carbonaceous, micaceous_ 35 Sideritic nodules abundant at 450-460. Sand: coarse-grained, angular, arkosic, sideritic, pyritiferous, lignitic; interbedded kaolin, white to red (mottled), mica- ceous ___________________________________________ 305 Pink kaolin prominent at 680-700. Clay: dark-gray to black, micaceous, carbonaceous 145 Limestone, gray, dense, crystalline, sandy, glauconitic, macroshells prominent at 840-855. Clay: dark-brown, silty, carbonaceous, highly micaceous 20 Sand: coarse-grained, angular, arkosic; interbedded clay, dark-brown, silty, carbonaceous, highly micaceous __ _______________ 195 Clay: dark-brown, silty, carbonaceous, very micaceous, fos- siliferous (casts of megafossils); sand ______ _____________ __ 50 Sand: coarse-grained, angular, arkosic; interbedded clay, dark-brown, silty, carbonaceous, very micaceous 170 485 790 935 955 1,150 1,200 1,370 In Tuscaloosa Formation: Sand: fine to coarse-grained, arkosic, rather massive; inter- bedded clay, yellowish-green, sandy, somewhat carbona- ceous, micaceous 140 Sand: fine to coarse-grained, angular, arkosic; interbedded clay, yellowish-green, red to purple at depth, somewhat carbonaceous, sandy, micaceous ____ 650 1,510 2,160 In Lower Cretaceous (? ) Sand: very coarse-grained, angular, extremely arkosic; in- terbedded clay, olive-green to tan to brick-red, very mica- ceous, sandy ___ 328 2,487 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 333 Summary: Thickness Depth (feet) (feet) Residuum - ---------- - -------------- --------------------------- 80 Oligocene (undifferentiated) ------------------------------------------ 20 Upper Eocene (Cooper marl) ---------------------------------------------------------------- 35 Upper Eocene (Barnwell formation) -------------------------------------------- _____ 120 Middle Eocene (Lisbon formation) --------------------------------------------- 125 Middle Eocene (Tallahatta formation) ------------------------------------------- 70 Upper Cretaceous (post-Tuscaloosa, undifferentiated)____________________ 920 In Upper Cretaceous (Tuscaloosa formation) ---------------------------------- 790 In Lower Cretaceous (?) ____ 328 80 100 135 255 380 450 1,370 2,160 2 2,488 Potential Water-Bearing Zones: Limestone ----------------- --------------------------------------------------------------- 80 Sand: coarse-grained ---------------------------------------------------------------- 250 Sand: coarse-grained ------------------------------------------------------------------------------ 200 Sand: fine to coarse-grained ----------------------------------------------------------------- 140 255 790 1,150 1,510 Location: 0.9 mi. east of road intersection in Georgetown, 0.4 mi. east of junction of Highways 27 and 50, north side of Highway 50 at school house Owner: No. 1 Kaigler School Driller: Gray Artesian Well Company Drilled: May 1955 QUITMAN COUNTY Well No.: GGS 436 Elev.: 341 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Clay: mottled, sandy 11 11 Sand: fine to medium-grained, coarser-grained at depth, angular; some clay, as above ------------------------ 31 42 Sand: fine to coarse-grained, angular; some clay, tan, sandy, micaceous 9 51 Gravel: pea-size grains, subrounded 5 56 Upper Cretaceous: Providence Sand: Marl: dark bluish-gray, sandy, micaceous, fossiliferous at depth (macroshells, Ostracods and Foraminifera) 39 95 Anomalina pseudopapillosa at 72-82. 1This well reportedly penetrated the Basement complex. Samples in our collection reached a total depth of 2488. 334 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Indurated sand (or sandy limestone): gray, fine-grained, dense ----------------------------------------------------------------------------------------------------- 3 Marl: dark bluish-gray, sandy, micaceous 13 Indurated sand (or sandy limestone): as above _ 2 Marl: dark-gray, silty, micaceous, pyritiferous 79 Depth (feet) 98 111 113 192 Ripley Formation: Marl: dark bluish-gray, silty, micaceous, pyritiferous, glau- conitic, fossiliferous (at certain horizons, macroshells, Ostracods and Foraminifera) _____ 203 395 Gaudryina rudita, Cibicides harperi at 212-232. Summary: Pliocene to Recent (undifferentiated) Upper Cretaceous (Providence sand) Upper Cretaceous (Ripley formation) 56 56 136 192 203 395 Potential Water-Bearing Zones: None observed to total depth of well. Remarks: Owing to scarcity of water-bearing sands, this well is in an area in which it is difficult to obtain ground water. It is doubtful that the shallow-lying terrace gravels would be perennially productive. Moreover, the indurated sand (or sandy limestone) at depths 95-98 and 111-113 are not thought to be of sufficient thickness to carry water in sufficient quantity to satisfy even domestic needs. The best aquifers, therefore, should be sought at considerably lower depths than that reached by this well. Such water-bearing sands would be encountered in the underlying Eutaw formation and in the more deeply buried Tuscaloosa formation. Location: In Georgetown Owner: No. 1 City of Georgetown Driller: Layne-Atlantic Company Drilled: October 1956 QUITMAN COUNTY Well No.: GGS 502 Elev.: 316 Thickness Depth (feet) (feet) Upper Cretaceous: Providence and Ripley Formations (Undifferentiated): Marl: dark bluish-gray to black, sandy, micaceous, pyritiferous, glauconitic, fossiliferous (macroshells, Ostracods, WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 335 Thickness (feet) and Foraminifera at certain levels); interbedded indurated sand (or sandstone), dark-gray, argillaceous, micaceous, pyritiferous, glauconitic, fossiliferous (macroshells at cer- tain horizons) ______ __ __ ___________ _____ _________ _____ ________ 350 Anomalina pseudopapillosa at 115-125. Epistomina ea1acolla, Cibieides harperi at 125-135. Globotruncana cretacea, Loxostoma plaitum, Planulina correcta at 208-218. Clavulinoides t1-ilate1a var., Robulus navarroensis, Robulus pondi at 235-246. Marl: dark-gray to brownish at depth, micaceous, somewhat carbonaceous (lignitic), sandy, fossiliferous (macroshells, Ostracods, and Foraminifera at certain levels) _______________ 90 Planulina taylorensis at 350-360. Depth (feet) 350 440 Cusseta Sand: Sand: fine to coarse-grained, subangular, indurated at cer- tain levels, micaceous; interbedded marl (or shale), as above __ 75 515 Blufftown Formation: Shale: dark-brown, fissile, splintery at depth, carbonaceous, micaceous, fossiliferous (macroshells, Ostracods, and Fora- minifera at certain levels) __ _______________________________________ 525 Vaginulina texana, Kyphopyxa christneri at 525-535. Sand: fine to medium-grained, subangular, somewhat in- durated at certain levels, micaceous, glauconitic, phos- phatic, fossiliferous (macroshells, Ostracods at certain levels) ________________ --------------------- ------ ------ ---- 70 Sand: fine to coarse-grained, subangular, pyritiferous, glau- conitic, phosphatic, fossiliferous at certain levels (coquina and occasional fish teeth) ; fairly numerous thin stringers of shale, as above 128 1,040 1,110 1,238 In Eutaw Formation: Shale: yellowish-green to dark-brown to black, fissile, somewhat splintery, micaceous, carbonaceous; interbedded sand, fine to medium-grained, subangular, phosphatic, micaceous__ 87 Sand: fine to medium-grained, subangular 35 1,325 1,360 Tuscaloosa Formation: Sand: fine to coarse-grained, angular, arkosic, micaceous; interbedded clay, greenish-gray, somewhat fissile, sandy, micaceous, iron-stained at certain levels 140 1,500 336 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Upper Cretaceous (Providence and Ripley, undifferentiated) Upper Cretaceous (Cusseta sand) ________________________________________ Upper Cretaceous (Blufftown formation) In Upper Cretaceous (Eutaw formation) ___ Upper Cretaceous (Tuscaloosa formation) Thickness Depth (feet) (feet) 440 440 75 515 723 1,238 122 1,360 140 1,500 Potential Water-Bearing Zones: Sand: fine to medium-grained __ Sand: fine to coarse-grained __ Sand: fine to coarse-grained ______________ _ Sand: fine to coarse-grained ________________________ Sand: fine to coarse-grained _________________________ 34 ------------------- 13 ----------------- 9 24 --------------- 13 1,360 1,377 1,404 1,434 1,460 Location: In Cuthbert Owner: City of Cuthbert Driller: Layne-Atlantic Company Drilled: 1958 RANDOLPH COUNTY Well No.: GGS 552 Elev.: 460 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, angular, argillaceous, brick-red, limonitic, sparsely glauconitic -------------------------------------------------------- 44 44 Sand: as above; some clay, yellowish-green, sandy, micaceous ___ . 20 64 Lower Eocene: Wilcox Group (Undifferentiated): Clay: light-gray, silty, micaceous, carbonaceous 82 146 Sand: fine to medium-grained, subangular, abundantly glau- conitic 10 156 Paleocene: Midway Group: Clayton Formation: Sand: fine to coarse-grained, subangular, pale-green quartz grains; interbedded clay, black, somewhat fissile, carbona- ceous, micaceous ___ ---------------------------------------------------------------------------- 81 237 Limestone: gray, dense, nodular, somewhat sandy, pyritifer- ous, fossiliferous (fragments, casts and molds of mega- fossils, bryozoan remains, and Foraminifera) -------------------------- 73 310 Limestone: as above but very sandy _ 21 331 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 337 Upper Cretaceous: Providence Sand: Thickness (feet) Sand: fine to coarse-grained, somewhat angular 7 Marl: bluish-gray, silty, chalky, micaceous, pyritiferous, fos- siliferous (some Foraminifera) ________ _____ _____________________ 13 Anomalina pseudopapillosa, Epistomina caracolla at 338346. Summary: Middle Eocene (Claiborne group, undifferentiated) 64 Lower Eocene (Wilcox group, undifferentiated) ___ 92 Paleocene (Clayton formation) _______________________________ 175 Upper Cretaceous (Providence sand) ____________________________________ 20 Depth (feet) 338 351 64 156 331 351 Potential Water-Bearing Zones: Sand: fine to coarse-grained ___ Limestone ______________ Sand : fine to coarse-grained ____ ________ ____________ ____________________ 91 237 73 310 7 338 Location: Augusta Owner: No. 1 Georgia Training School (Circular Court) Driller: Virginia Machine and Well Company Drilled: February 1940 RICHMOND COUNTY Well No.: GGS 129 Elev.: 136 Thickness Depth (feet) (feet) No samples 9 9 In Upper Cretaceous: Tuscaloosa Formation: Kaolin: white, micaceous, sandy; interbedded sand, fine to coarse-grained, angular, arkosic ________________ ---------------------------------- 131 140 Sand: medium to coarse-grained, angular, arkosic, with in- clusions of kaolin (clay balls) --------------------------------------------- 18 158 Kaolin: yellow to white, micaceous, very sandy, limonitic 4 162 Brown limonitic pellets prominent at 160-162. Basement Complex (Undifferentiated): Clay: bluish-gray, sandy, highly micaceous 13 175 Crystalline rock _____ ---------------------------------------------------------------------------- 154 329 338 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Thickness Depth (feet) (feet) No samples ------------------------- ------------------------------------------------------------------- 9 9 In Upper Cretaceous (Tuscaloosa formation) ----------------------------------- 153 162 Basement complex (undifferentiated) -------------------------------- 167 329 Potential Water-Bearing Zones: Sand: medium to coarse-grained ____ Fractures and voids in Basement complex __ _ 18 158 154 329 Location: Augusta Owner: No. 2, Georgia Training School (Circular Court) Driller: Virginia Machine and Well Company Drilled: May 1940 RICHMOND COUNTY Well No.: GGS 130 Elev.: 136 Thickness Depth (feet) (feet) Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, brown, argillaceous, arkosic ________ 10 Kaolin: gray to cream, micaceous 15 Kaolin: brick-red, micaceous, very sandy, limonitic ___________________ 25 Kaolin: gray to pink, micaceous, sandy ____ _ 45 Kaolin: white to gray to yellow, micaceous _ 40 Sand: fine to medium-grained, angular with inclusions of kaolin (clay balls) __________________________ ----------------------------------------------- 10 Kaolin: gray to yellow to tan to red, micaceous, sandy ____ 50 Sand: fine to coarse-grained, angular, with inclusions of kaolin (clay balls) _____ ___________ ------------------------------- 20 Kaolin: white to gray to yellow to pink, very sandy, micaceous__ 80 Sand: fine to coarse-grained, angular, arkosic 10 Basement Complex (Undifferentiated): Clay: olive-green to tan, sandy, highly micaceous ________________________ 20 Clay: as above, but dark bluish-green 5 Crystalline rock __________ ------------------------------------------------------------------------- 870 10 25 50 95 135 145 195 215 295 305 325 330 1,200 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 339 Summary: Upper Cretaceous (Tuscaloosa formation) Basement complex (undifferentiated) Thickness Depth (feet) (feet) 305 305 895 1,200 Potential Water-Bearing Zones: Sand: fine to coarse-grained _ ___________________ Sand: fine to coarse-grained ______________________ Fractures and voids in basement complex__ 10 215 10 305 870 1,200 Location: At Hotel Bon Aire, Augusta Owner: No. 1 Hotel Bon Aire Driller: Virginia Supply and Well Company Drilled: May 1952 RICHMOND COUNTY Well No.: GGS 309 Elev.: 330 Thickness Depth (feet) (feet) No samples 15 15 In Upper Eocene: Jackson Group, Barnwell Formation: Clay: light-brown, sandy, micaceous 20 35 Upper Cretaceous: Tuscaloosa Formation: Kaolin: white, micaceous, very sandy _ 25 60 Kaolin: white to gray to brick-red to purple (mottled), mica- ceous, limonitic _______ _ ____________________ 60 120 Sand: fine to coarse-grained 10 130 Kaolin: white, micaceous, very sandy 10 140 Sand : fine to coarse-grained _ 18 158 Basement Complex (Undifferentiated) 1 : Clay: gray, micaceous Schist: green, chloritic 2 160 320 480 Summary: No samples ___ ___ __________________________ ------------------------------ _______________ 15 15 In upper Eocene (Barnwell formation) ------------------------------------------------ 20 35 Upper Cretaceous (Tuscaloosa formation) ---------------------------------------- 123 158 Basement complex (undifferentiated) ------------------------------------------------ 322 480 'Probably Little River Series of Precambrian ( ?) age. 340 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Potential Water-Bearing Zones: Sand: fine to coarse-grained ___ Sand: fine to coarse-grained ____ Schist _ Thickness Depth (feet) (feet) 10 130 18 158 100 260 Location: Silver Crest and Fleming Heights, Gracewood Owner: No. 1 Silver Crest School Driller: Virginia Supply and Well Company Drilled: January 1954 RICHMOND COUNTY Well No.: GGS 371 Elev.: 272 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: gray to brown to red (mottled), sandy, limonitic 20 20 Clay: as above; inclusions of kaolin, white, micaceous, some- what sandy ________ --------------------------------------- 10 30 Upper Cretaceous: Tuscaloosa Formation: Kaolin: white, micaceous, somewhat sandy 10 40 Clay: light-brown, micaceous, rather sandy _ 10 50 No samples _______ 5 55 Kaolin: white, micaceous, sandy; interbedded sand, fine to coarse-grained ___________________ _________________________ 180 235 Sand: fine to coarse-grained Kaolin: white, micaceous, sandy ,_______________________ Clay: light-brown, micaceous, very sandy _ 15 250 5 255 7 262 Summary: Upper Eocene (Barnwell formation) -------------------------------------------------- 30 30 Upper Cretaceous (Tuscaloosa formation) ---------------------------------------- 232 262 Potential Water-Bearing Zones: Sand: fine to coarse-grained ---------------------------------------------------------------- 20 120 Sand: fine to coarse-grained --------------------------------------------------------------- 10 150 Sand: fine to coarse-grained__ ____ _______ ______ _____ _____________ __ 15 250 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 341 Location: Hephzibah owner: No.1 City of Hephzibah Driller: Layne-Atlantic Company RICHMOND COUNTY Well No. GGS 526 Elev.: 430 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Sand: fine to coarse-grained, angular; some clay, brick-red, sandy ---------------------------------------------------------------------------------------------------- 15 15 Sand: fine to coarse-grained, angular, arkosic, with inclu- sions of kaolin; interbedded clay, yellowish-green to tan to red (somewhat mottled), sandy _ __ ____________ 125 140 Upper Cretaceous: Tuscaloosa Formation: Kaolin: gray to pink, white at depth, micaceous, somewhat sandy _____________ ____________________ ______________________ ________________ 45 185 Kaolin: gray to purple. (mottled), sandy, sandier with depth Sand: coarse-grained, angular, arkosic No samples Sand: coarse-grained, angular, arkosic Sand: as above, inclusions of clay Sand: coarse-grained, angular, arkosic _ Kaolin: cream to red (mottled), micaceous, sandy ______ 75 260 15 275 13 288 10 298 12 310 20 330 20 350 Summary: Upper Eocene (Barnwell formation) _________ _ Upper Cretaceous (Tuscaloosa formation) Potential Water-Bearing Zones: Sand: coarse-grained __ _ Sand: coarse-grained _ Sand: coarse-grained _______________________ _ 140 140 210 350 15 275 10 298 20 330 342 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: At City Water Works, Ellaville Owner: No. 1 City of Ellaville Driller: Layne-Atlantic Company Drilled: March 1937 SCHLEY COUNTY Well No.: GGS 75 Elev.: 567 Thickness Depth (feet) (feet) No samples 120 120 In Upper Cretaceous: Providence Sand: Sand: fine to coarse-grained, limonitic No samples _______________________________________ 8 128 12 140 In Ripley Formation: Clay: bluish-gray to black, micaceous; some sand, fine to coarse-grained 460 600 No samples 110 710 In Blufftown Formation: Clay: dark-brown, somewhat fissile, silty, highly micaceous, carbonaceous, pyritiferous, glauconitic and fossiliferous at depth _ __________ _________________ 150 860 Vaginulina texana at 800-860. Summary: No samples __ 120 120 In Upper Cretaceous (Providence sand) __ ______ _ 8 128 No samples ____ -------------- 12 140 In Upper Cretaceous (Ripley formation)_ 460 600 No samples ______ __________________ ---------------- 110 710 In Upper Cretaceous (Blufftown formation) __ 150 860 Potential Water-Bearing Zones: Available samples too fragmentary and sketchy to permit determination of formational tops of water-bearing zones. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 343 Location: Approximately 200ft. east of well drilled in 1937 at City Water Works, Ellaville Owner: No. 2 City of Ellaville Driller: Layne-Atlantic Company Drilled: July 1948 SCHLEY COUNTY Well No.: GGS 174 Elev.: 567 Thickness Depth (feet) (feet) Middle and Lower Eocene (Undifferentiated): Clay: brick-red, very sandy, limonitic; fragments of clay, dark-gray, silty, lignitic, micaceous; inclusions of kaolin, white, micaceous ____________ ----------------------------------------------- 25 25 Sand: fine to coarse-grained, angular; some clay, as above____ 23 48 Sand: as above; some clay, gray to ochre, micaceous_____________________ 30 78 Paleocene: Midway Group: Clayton Formation: Clay: dark-gray to black, somewhat blocky and indurated, car- bonaceous, micaceous (finely disseminated), glauconitic at depth; inclusions of kaolin, white, micaceous (latter prob- ably "cave" from above)_______________ ________________________________________ 12 90 Robulus cf. R. midwayensis at 90-98. Limestone: gray, dense, crystalline, sandy, glauconitic at depth, fossiliferous (fragments and casts and molds of mac- roshells and bryozoan remains)__ ___ -------------------------------------- 8 98 Upper Cretaceous: Providence Sand: Kaolin: white to red (mottled), micaceous, and cave from above __ 29 127 Clay: gray to brown, somewhat blocky and indurated, car- bonaceous, micaceous (finely disseminated), fossiliferous (some F'oraminifera) ______ _ -------------- _ 8 135 Cibicides howelli, Anomalina sp. at 127-135. Clay: light-gray to tan, somewhat iron-stained, indurated, fis- sile, micaceous; sand, fine to coarse-grained, angular, and some cave from above _____ --------------------- 23 158 Sand: fine to coarse-grained, angular, sideritic; interbedded kaolin, white to pink (mottled), micaceous 107 265 In Ripley Formation: Sand: fine to medium-grained, lignitic, sideritic, pyritiferous; interbedded clay, black, somewhat fissile, micaceous, carbon- aceous 60 325 344 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Marl: gray to black, micaceous, carbonaceous, pyritiferous, fossiliferous (macroshells, Ostracods, and Foraminifera)________ 125 Robulus stephensoni, Gaudryina rudita, Loxostoma plaitum, Anomalina clementiana, Anomalina pseudopapillosa at 325-350. No samples __________________ 14 Depth (feet) 450 464 In Cusseta(?) Sand: Sand: fine to coarse-grained, angular, arkosic, limonitic; in- terbedded marl, as above__________________________________________________________________ 54 518 Sand: fine to coarse-grained, angular, limonitic, sideritic 128 646 Summary: Middle and lower Eocene (undifferentiated) Paleocene (Clayton formation) __ Upper Cretaceous (Providence sand) ____ In Upper Cretaceous (Ripley formation) _ No samples_____ ----------------------------------------------In Upper Cretaceous (Cusseta (?) sand) _ 78 78 20 98 167 265 185 450 14 464 182 646 Potential Water-Bearing Zones: Sand: fine to coarse-grained Sand: fine to coarse-grained Sand : fine to coarse-grained_ 15 190 5 525 71 646 Location: 3.7 mi. south of Ellaville via U.S. Highway 19, 2 mi. east of Highway 19, and 0.25 mi. northeast of LaCrosse Owner: No. 1 T. Childers Driller: Southeastern Drilling Company Drilled: July 1952 SCHLEY COUNTY Well No.: GGS 312 Elev.: 527 Thickness Depth (feet) (feet) Middle and Lower Eocene (Undifferentiated): Clay: brick-red, sandy, limonitic_ 10 10 Clay: mottled, sandy, somewhat bauxitic ( ?) _ 20 30 Sand: fine to coarse-grained; interbedded clay, yellow to light-tan, somewhat sandy________ ---------------------------------- 35 65 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 345 Thickness (feet) Sand: fine to coarse-grained; interbedded clay, gray, car- bonaceous, micaceous ____________ ------------------------------------------------------- 55 Clay: yellow, bauxitic(?)_____ _______________ ______________________ 5 Depth (feet) 120 125 Paleocene: Midway Group: Clayton Formation: Clay: gray to black, fissile_________________ 10 135 Limestone: gray, dense, crystalline (much calcitized), sandy, sandier at depth, fossiliferous (macroshells) 35 170 Upper Cretaceous: Providence Sand: Kaolin: white, micaceous, sandy__________________________ Sand: fine to coarse-grained____ Kaolin: mottled, sandy__ Sand: coarse-grained 5 175 35 210 26 236 27 263 Summary: Middle and lower Eocene (undifferentiated) ____ _ Paleocene (Clayton formation) ____ Upper Cretaceous (Providence sand) _______ _ 125 125 45 170 93 263 Potential Water-Bearing Zones: Sand: fine to coarse-grained____ Sand: coarse-grained ______ 35 210 27 263 Location: 0.3 mi. north of Courthouse in Ellaville, 0.25 mi. west of Highway 19 at public swimming pool Owner: Schley County (Department of Recreation) Driller: Layne-Atlantic Company Drilled: August 1952 SCHLEY COUNTY Well No.: GGS 315 Elev.: 568 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group (Undifferentiated): Clay: yellowish-green to tan to brick-red (mottled), very sandy, limonitic _ 40 40 Sand: medium to coarse-grained, massive, angular_ 55 95 346 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Lower Eocene and Paleocene (Undifferentiated): Thickness (feet) Clay: brown to olive-green, fissile, greasy appearance, iron- stained, micaceous, sideritic; blocky clay, black, carbonace- ous, micaceous (finely disseminated) ,51 Depth (feet) 146 Upper Cretaceous : Providence Sand: Sand: coarse-grained, angular, arkosic, limonitic; interbedded clay, dark-green to tan to red (mottled), iron-stained, greasy appearance, micaceous; inclusions of kaolin, white, micaceous _ 62 208 Summary: Middle Eocene (Claiborne group, undifferentiated)_ Lower Eocene and Paleocene (undifferentiated)_ Upper Cretaceous (Providence sand) ______ 95 95 51 146 62 208 Potential Water-Bearing Zones: Sand: coarse-grained ____ Sand: coarse-grained ___ 9 156 30 192 Samples of poor quality. Remarks: Location: Approximately 100 yd. west of Savannah-Atlanta R.R., east side of Municipal Baseball Park, in Sylvania Owner: No. 3 City of Sylvania Driller: Stevens and Southern Well Drilling Company Drilled: April 1952 SCREVEN COUNTY Well No.: GGS 295 Elev.: 202 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to coarse-grained, subangular, arkosic; with some clay, tan to red (mottled), sandy 10 10 Clay: bluish-gray to tan to red (mottled), sandy, micaceous; sand, fine-grained, with finely disseminated black pebbles of phosphate ___ ____________________ _ 10 20 Sand: fine to coarse-grained, subangular, arkosic; some clay, yellowish-green, sandy _______ ______________ 105 125 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 347 Thickness (feet) Limestone: light-gray, dense, very sandy, phosphatic, fossil- iferous (macroshells) __ 9 Depth (feet) 134 Oligocene (Undifferentiated): Limestone: light-gray to cream at depth, somewhat nodular, massive, fossiliferous (fragments and molds of molluscan shells, echinoid and bryozoan remains, Ostracods and Fora- minifera) ____ 86 220 Quinqueloculina sp., Pyrgo sp., Gypsina globula, Asterocyclina1 sp. at 135-140. Upper Eocene: Jackson Group: Cooper Marl: Limestone: white, rather soft and chalky, fossiliferous (echi- noid and bryozoan remains and Foraminifera)_ 38 258 Textularia subhauerii, Textularia hannai, Robulus arcuatostriatus var., Siphonina jacksonensis, Eponides jacksonensis, Nonion planatus, Gypsina globula (common) at 225-230. Textularia adalta, Textularia dibollensis var., Planularia cf. P. truncana, Marginulina cocoaensis, Dentalina jacksonensis, Nodosaria fissicostata, Alaba-mina -mississippiensis, Reussella sculptilis, A ngulogerina ocalana, Cassidulina subglobosa, Cibicides cocoaensis, Cibicides lobatulus, Planulina cocoaensis, and abundant bryozoan remains at 250-255. Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: light-gray, dense, very sandy, sparsely phosphatic, fossiliferous (macroshells, echinoid and bryozoan remains) __ 10 268 Sand: fine to medium-grained _ 22 290 Indurated sand: fine to medium-grained; thin tongues of lime- stone, gray, dense, sandy, sparsely glauconitic 40 330 Sand: fine to medium-grained; thin stringers of marl, gray, somewhat sandy 86 416 Sand: fine to coarse~grained_ 18 434 Limestone: gray, dense, sandy, glauconitic__ 28 462 Sand : fine to coarse-grained ____ 13 475 Limestone: gray, dense, sandy, glauconitic_________ - 'Reworked ( ?) fossil of middle Eocene age. 15 490 348 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Thickness (feet) Miocene (undifferentiated) _ ------------------------------ 134 0 ligocene (undifferentiated) _ __ _______________ 86 Upper Eocene (Cooper marl) ___________________ _ 38 Middle Eocene (Lisbon formation) ______________________________________________________ 232 Depth (feet) 134 220 258 490 Potential Water-Bearing Zones: Limestone _________ 88 25~ Sand: fine to coarse-grained____________________________________________________________________ 18 434 Limestone __________________ --------------------------------------------------------------------------------- 28 462 Location: At Sewage Treatment Plant in Sylvania Owner: City of Sylvania Driller: Layne-Atlantic Company Drilled: February 1955 SCREVEN COUNTY Well No.: GGS 413 Elev.: 210 1 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to medium-grained, arkosic, finely disseminated phosphate grains; clay, tan to red (mottled), sandy, limon- itic ___________________________ ------------------------------------------------- 10 10 Clay: bluish-gray to tan to red (mottled), sandy, limonitic_ 10 20 Clay: yellowish-green, sandy_______ 20 40 Clay: as above, but much sandier 38 78 Sand: fine to coarse-grained; interbedded limestone, light- gray to white, dense (much calcitized), sandy, phosphatic, fossiliferous (macroshells) --------------------------------------- __________________ 13 91 Oligocene (Undifferentiated): Limestone: light-gray, very dense (much calcitized), massive, nodular, fossiliferous (some echinoid and bryozoan remains and Foraminifera) --------------------------------------------------------------------------- 5 96 Pyrgo sp., Rotalia mexicana var., Gypsina globula2, Textularia sp., Cibicides pseudoungerianus at 91-96. Limestone: yellow to white at depth, saccharoidal (highly calcitized), crystalline, nodular, fossiliferous (as above) __________ 7 103 Dictyoconus2 sp. at 96-103. 'Average elevation based on Georgia State Highway Maps. 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 349 Thickness (feet) Limestone: cream, nodular (much calcitized), fossiliferous (as above) ______ ----------------------------------------------------------------------------------- 65 Cancris vicksburgensis, Pullenia alazanensis at 118-128. Depth (feet) 168 Upper Eocene: Jackson Group: Cooper Marl: Limestone: whiter than above, soft, chalky, weathered ( ?) , fos- siliferous (abundant bryozoan remains and Foraminifera) ______ 46 214 Siphonina jacksonensis, Gypsina globula, Eponides jacksonensis, Lepidocyclina sp. at 168-178. Discorbis assulata, Planulina cocoaensis, Cibicides cocoaensis, Robulus alato-limbatus, Robulus arcuato-striatus var., Rotalia mexicana var., Pyrgo sp., Quinqueloculina sp., Cibicides lobatulus, Cibicides mississippiensis, Gypsina globula at 198-214. Middle Eocene(?): Claiborne Group: Lisbon Formation: Sand: fine to coarse-grained, angular, fossiliferous (casts and molds of megafossils) -------------------------------------- 2 216 Summary: Miocene (undifferentiated) __ ___________________________ 91 91 Oligocene (undifferentiated) ___ ---------------------------------------------Upper Eocene (Cooper marl) ___________ ------------------------ 77 168 46 214 Middle Eocene ( ?) (Lisbon formation) _ 2 216 Potential Water-Bearing Zones: Sand: fine to coarse-grained __ _ Limestone ___ _________________ Sand: fine to coarse-grained 13 91 123 214 2 216 Location: Owner: No.1 Arnett Elementary School Driller: Speedy McQuaig Plumbing Company Drilled: 1955 SCREVEN COUNTY Well No.: GGS 462 Elev.: 216 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand : fine to medium-grained, arkosic; clay, bluish-gray to tan to red (mottled), very sandy______________________________________________________ 10 10 350 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Miocene (Undifferentiated): Thickness (feet) Clay: yellowish-green to purple (mottled), sandy, phosphatic (at depth) ; interbedded sand, fine to medium-grained, somewhat coarser-grained at depth_____________________________ ---------------- 150 Light-gray phosphatic pebbles prominent at 100-110. Yellowish-green chert prominent at 150-160. Clay and sand: as above; thin tongues of limestone, white, dense, sandy 60 Depth (feet) 160 220 Oligocene (Undifferentiated): Limestone: light-gray to pinkish, dense (much calcitized), nodular, sandy, fossiliferous (casts and molds of megafossils chiefly Gastropods, bryozoan remains and Foraminifera) _ 80 300 Dictyoconus1 sp., Rotalia mexicana var., Qninqueloculina sp. at 220-230. Gypsina globula1 common at 230-240. Lepidocyclina mantelli? at 250-260. Summary: Pliocene to Recent (undifferentiated) __ _ Miocene (undifferentiated) _____ Oligocene (undifferentiated) ____ 10 10 210 220 80 300 Potential Water-Bearing Zones: Limestone Sand: fine to coarse-grained__ ____ __ _ _______ 70 290 10 300 Location: 6.5 mi. east of Rockyford, south side of alternate Highway 17 Owner: No. 1 Oak Grove Methodist Church Driller: Turner Well Drilling Company Drilled: 1959 SCREVEN COUNTY Well No.: GGS 578 Elev.: 165 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: light-gray with red streaks (mottled), pale-yellowish- green at depth, very sandy_______________________________________________________ 84 84 Sand: coarse-grained, subrounded, arkosic__ 41 125 'Reworked ( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 351 Thickness (feet) Clay: pale-yellowish-green, sandy, light-brown rounded phos- phatic pebbles ___ ____ __ ___ ___ __ _____________________________________ 21 Sand: coarse-grained, subrounded, jet-black rounded phos- phatic pebbles, fossiliferous (macroshells) _______ 31 Depth (feet) 146 177 Oligocene (Undifferentiated): Limestone: cream with dark-gray to black streaks, nodular, massive but porous, somewhat cherty, fossiliferous (frag- ments and molds of megafossils, echinoid and bryozoan re- mains, Ostracods, and Foraminifera)_ 18 195 Quinqueloculina sp., Rotalia mexicana var., Asterigerina subacuta, Lepidocyclina sp.l, Operculinoides sp.1, and Gypsina globula1 at 177-188. Limestone: cream, rather soft and chalky, fossiliferous (bryo- zoan remains and some Foraminifera) ______ 12 207 Gypsina globula1 common at 195-207. Miocene (undifferentiated) _ Oligocene (undifferentiated) Summary: 177 177 30 207 Limestone Potential Water-Bearing Zones: 30 207 Location: 16 mi. north of Sylvania on U.S. Highway 301 Owner: Wade Plantation Driller: Turner Well Drilling Company Drilled: 1959 SCREVEN COUNTY Well No.: GGS 590 Elev.: 95 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: coarse-grained, subangular, arkosic; interbedded clay, dark-brown to mottled to yellowish-green at depth, sandy 123 123 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, much leached, rather soft and porous, fos- siliferous (molluscan shells, echinoid and bryozoan remains, and s:Jme Foraminifera) ___ _________ 20 143 Operculinoides floridensis, Asterocyclina nassauensis, Lepidocyclina sp. at 123-143. 'Reworked ( ?) fossil of middle Eocene age. 352 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Middle Eocene: Claioorne Group: Lisbon Formation: Thickness (feet) Sand: fine to coarse-grained, subangular, sparsely phosphatic, fossiliferous at depth (Foraminifera) ; some clay, light- gray, somewhat indurated and tough, very sandy, finely glauconitic, micaceous ______ 20 Nonion advena abundant, Nonion inexcavatus, Bolivina sp., Cibicides arnericanus var. antiquus, Cibicides lobatulus at 143-163. Clay: light to dark-greenish-gray to brownish-green, very sandy, sparsely phosphatic, micaceous, carbonaceous 10 Limestone: light-gray, saccharoidal, dense, sandy, sparsely phosphatic, glauconitic, fossiliferous (molds and impressions of molluscan shells, echinoid and bryozoan remains, and some Foraminifera) ____ 57 Spiroplectarnrnina rnississippiensis var., Textularia hannai, Nonion advena, Discorbis assulata, Gyroidina soldanii var., Cibicides arnericanus, Cibicides lobatulus, Cibicides cf. C. refulgens at 191-210. Limestone: as above but light-gray to cream at depth __ 41 Marl: cream but rather dark-brownish-green at depth, some- what indurated and tough, sandy, with hard limey nodules, ,fossiliferous (echinoid and bryozoan remains, Ostracods, and Foraminifera); interbedded limestone or coquina, white to light-brown, sandy, coarsely but sparsely glaucon- itic, fossiliferous (echinoid and bryozoan remains, and abun- dant fragments and molds of megafossils); beds of sand, fine to coarse-grained, subangular, sparsely phosphatic 103 Discorbis georgiana, Gyroidina soldanii var., Alabarnina atlantisae, N onion planatus, Guttulina irregularis, Cibicides danvillensis, Cibicides ouachitaensis, Cibicides pseudoungerianus var., Cibicides westi, Cibicides sp. at 271-292. Cibicides pseudoungerianus var. lisbonensis, Cibicides pippeni, Cibicides westi at 292-312. Coquina prominent at 312-333. Depth (feet) 163 173 230 271 374 Summary: Miocene (undifferentiated) ____________ _ Upper Eocene (Ocala limestone) Middle Eocene (Lisbon formation) _ Sand: fine-grained Limestone Potential Water-Bearing Zones: 123 123 20 143 231 374 30 173 98 271 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 353 Location: In Donalsonville Owner: City of Donalsonville Drilled: August 1947 SEMINOLE COUNTY Well No.: GGS 149 Elev.: 1501 Thickness - - - - -(feet) Depth (feet) No samples 60 60 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white to cream, much calcitized, crystalline, mas- sive, fossiliferous (bryozoan remains and Foraminifera) 100 160 Operculinoides sp., Lepidocyclina sp. at 65-77. Gypsina globula at 77-90. Amphistegina pinarensis var. at 100-112. Summary: No samples ----------------------------------- __ In upper Eocene (Ocala limestone) 60 60 100 160 Potential Water-Bearing Zones: Limestone __________________ _ 100 160 Remarks: Additional aquifers-water-bearing sands and limestones-occur below total depth of this well. Location: 660 ft. from south line and 660 ft. from east line of Land Lot 82, 27th Land District Owner: No.1 W. E. Harlow Driller: Mont Warren et al Drilled: February 1949 SEMINOLE COUNTY Well No.: GGS 187 Elev.: 145 (derrick floor) Thickness Depth (feet) (feet) Residuum: Clay: bluish-gray to tan (mottled), very sandy, limonitic______ 40 40 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: yellow, much leached, crystalline, highly calci- tized, fossiliferous (casts and molds of megafossils, echinoid and bryozoan remains, and some Foraminifera) _________________ 10 50 'Average elevation based on Georgia State Highway Maps. 354 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thicknes (feet) Sand: fine to coarse-grained, angular; some limestone, as above _ 10 A mphistegina pinarensis var., Operculinoides sp., Asterocyclina sp. at 50-60. No samples_ 603 Depth (feet) 60 GC3 In Middle Eocene: Claiborne Group: Tallahatta Formation: Sand: fine to coarse-grained, subangular, somewhat indurated, glauconitic; fragments of limestone, gray, crystalline, dense, very sandy, coarsely glauconitic, fossiliferous (fragments, casts and molds of megafossils) ____ 57 720 Lower Eocene: Wilcox Group (Undifferentiated): Indurated sand: fine to medium-grained, subangular, coarsely and abundantly glauconitic, fossiliferous (fish teeth) 30 750 Clay: dark-gray, silty, lignitic, micaceous _ 160 910 Paleocene: Midway Group: Clayton Formation: Limestone: gray, dense, crystalline, very sandy, glauconitic, fossiliferous (fragments and casts of megafossils) 10 920 Indurated sand: fine-grained, dense, saccharoidal, glauconitic (finely disseminated), fossiliferous (fragments, casts and molds of megafossils, bryozoan remains, Ostracods, and Foraminifera) 60 980 Operculinoides catenula, Rotalia sp. at 960-970. Pseudophragmina stephensoni, Rotalia sp., Boldia madrugensis at 970-980. Limestone: cream, granular, coarsely glauconitic at certain levels, cherty, fossiliferous (some Foraminifera) _ 85 1,065 Brown chert prominent at 990-1000. Vaginulina lonr,tiforma, Boldia madrugensis, Discorbis midwayensis var. soldadoensis, Siphonina prima at 1040-1050. Indurated sand: dark-gray, fine-grained, argillaceous, glauconitic (finely disseminated), micaceous; stringers of clay, dark-gray, micaceous, carbonaceous____ 75 1,140 Indurated sand 1 : as above_____________ 90 1,230 Limestone: gray, granular, rather loosely consolidated, glau- conitic (finely disseminated), fossiliferous (some Foramini- fera) -------------------------------------------------------------------------------- 170 1,400 'Indurated sand grades gradually downward into the underlying granular limestone. No sharp contact was observed between these two lithologic units. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 355 Thickness (feet) Marl: gray, silty, chalky, micaceous, fossiliferous (abundant Foraminifera2) 30 Depth (feet) 1,430 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Marl: gray, chalky, micaceous, pyritiferous, fossiliferous (abundant Foraminifera) __ 25 Globotruncana cretacea common at 1430-1440. Indurated sand: fine-grained, glauconitic, rather dense, mi- caceous 220 Marl: gray, chalky, micaceous, pyritiferous, fossiliferous (at certain horizons, macroshells, Ostracods, and Foraminifera) 805 Planulina taylorensis at 1720-1730. Bolivinoides decorata at 1730-1740. Kyphopyxa christneri at 2060-2070. Vaginulina texana at 2310-2320. Sand: fine to coarse-grained, somewhat indurated, glauconitic (finely disseminated) ; thin stringers of marl, as above__ 125 Sand: indurated, more or less fine to coarse-grained, angular, phosphatic, glauconitic (finely disseminated) ______ 145 1,455 1,675 2,480 2,605 2,750 Tuscaloosa Formation: Sand: fine to coarse-grained, angular, micaceous, fossiliferous (at certain horizons, macroshells); clay, pale-green, some- what mottled, sandy, micaceous 190 Sand: fine to medium-grained, angular, micaceous, fossilifer- ous (at certain horizons, macroshells) ; interbedded shale, dark-gray, fissile, carbonaceous, micaceous (finely dissemi- nated flakes) ______ 250 Indurated sand: fine-grained, abundantly glauconitic (finely disseminated); some shale, as above __ _ 78 Sand: coarse-grained, angular, arkosic; interbedded clay, yellowish-green to red (mottled), micaceous, sandy_ 304 2,940 3,190 3,268 3,572 Summary: Residuum Upper Eocene (Ocala limestone) No samples __ ____________ _ In middle Eocene (Tallahatta formation)_ Lower Eocene ("Wilcox group, undifferentiated) ____ Paleocene (Clayton formation)_ ________ --------- __ Upper Cretaceous (post-Tuscaloosa, undifferentiated) Upper Cretaceous (Tuscaloosa formation) 2TamE:"si fauna of. Paleocene age. 40 20 603 57 190 520 -- _____ 1,320 822 40 60 663 720 910 1,430 2,750 3,572 356 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Potential Water-Bearing Zones: None observed in samples available on this well. Thickness Depth (feet) (feet) Remarks: Water-bearing limestone occurs somewhere in the interval 60-400. Samples were lacking in the interval 60-663, hence the thickness of the Ocala formation in this well is not known on the basis of available samples. Location: 2.5 mi. north of Lumpkin on Highway 27 Owner: No. 1-A Interstate Land Development Company Driller: Southeastern Drilling Company Drilled: October 1955 STEWART COUNTY Well No.: GGS 451 Elev.: 525 Thickness Depth (feet) (feet) Upper Cretaceous: Providence Sand: Sand: fine to coarse-grained, angular, limonitic; some clay, tan to pink (mottled) to white (kaolin) at depth, micaceous, sandy ------------------------------------------------------------------------------------------------ 70 70 Sand: coarse-grained, angular, arkosic__ 5 75 Ripley Formation: Marl: dark-gray, silty, somewhat sandy at depth, micaceous, carbonaceous, phosphatic, glauconitic, fossiliferous at depth (macroshells, Ostracods, and Foraminifera) _______________ _ 255 330 Gaudryina sp., Robulus sp., Anomalina clementiana at 100110. Loxostoma plaitum, Anomalina pseudopapillosa, Anomalina clementiana at 120-130. Planulina henbesti at 220-230. Cusseta and Blufftown (Undifferentiated): Sand: fine to coarse-grained, angular, micaceous, phosphatic, lignitic; interbedded clay, dark bluish-gray to brown, some- what fissile, carbonaceous, micaceous, pyritiferous__ _________________ 180 510 Summary: Upper Cretaceous (Providence sand)_______ __ ___________ 75 '76 Upper Cretaceous (Ripley formation)__________________ ____________________ 255 330 Upper Cretaceous (Cusseta and Blufftown, undifferentiated)________ 180 510 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 357 Potential Water-Bearing Zones: Sand : fine to coarse-grained Thickness Depth (feet) (feet) 20 434 Location: 1.5 mi. east of road junction in Omaha, north side of east-west secondary road Owner: No. 1 Omaha School Driller: Layne-Atlantic Company Drilled: February 1956 STEWART COUNTY Well No.: GGS 478 Elev.: 318 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Clay: bluish-gray to tan to brick-red (mottled), very sandy, limonitic ____________ -------------------------------- --------------------------- ___________________ 11 11 Sand: very coarse-grained (subgravel size), angular, arkosic 17 28 Upper Cretaceous: Ripley Formation: Marl: dark bluish-gray, carbonaceous, micaceous, phosphatic, pyritiferous, fossiliferous (macroshells, Ostracods, and Foraminifera); sideritic and glauconitic at depth 66 94 Robulus stephensoni at 68-78. Glauconite common at 88-94. Cusseta Sand : Sand: fine to coarse-grained, subangular, fossiliferous (mac- roshells) __ ____ _ __________________ - _ --------- ------ 20 114 Blufftown Formation: Marl: as above; interbedded at widely separated intervals with beds of indurated sand, dark-gray, rather dense and crystalline, micaceous, glauconitic (finely disseminated) __ 197 311 Vaginulina texana at 188-198. Vaginulina texana, Marginulina sp. at 290-300. Summary: Pliocene to Recent (undifferentiated)___________________ _______________ 28 28 Upper Cretaceous (Ripley formation)-------------------------------------------------- 66 94 Upper Cretaceous (Cusseta sand)---------------------------------------- 20 114 Upper Cretaceous (Blufftown formation)-------------------------------------------- 197 311 358 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Potential Water-Bearing Zones: Sand: fine to coarse-grained____ rl'hickne81:) (feet) Depth (feet) 20 114 Remarks: The best aquifers (sand) in this area occur much deeper than the total depth of this well. Such aquifers belong to the more deeply buried Eutaw and Tuscaloosa formations. Location: Northeastern part of County, near Flint River, few hundred yd. south of Creek Branch, east side of north-south County Road Owner: No. 6 USGS Test Hole Driller: Scott Bros. Drilled: August 1946 SUMTER COUNTY Well No.: GGS 137 Elev.: 278 Thick:w>ss (feet) Depth (feet) Residuum: Clay: mottled, very sandy, limonitic 20 20 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, glauconitic at depth, sandy, fossiliferous (macroshells and Foraminifera at certain levels) 26 46 Lepidocyclina sp., Gypsina globula at 30-40. Middle Eocene: Claiborne Group: Lisbon Formation: Marl: light-gray, sandy, glauconitic (finely disseminated grains), fossiliferous (macroshells, bryozoan remains, and Foraminifera); interbedded limestone, cream, dense, sandy, glauconitic, fossiliferous (macroshells) _ 44 90 Gyroidina soldanii var., Siphonina claibornensis, Cibicides westi at 46-50 core. Tallahatta Formation: Sand: fine to coarse-grained, angular, phosphatic, fossilifer- ous (a coquina) ____________ _ 100 190 Limestone: gray, dense, sandy, glauconitic, fossiliferous (maeroshells) 10 200 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 359 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, carbonaceous, glauconitic_ Thickness Depth (feet) (feet) 60 260 Paleocene: Midway Group: Clayton Formation: Sand: fine to medium-grained, angular, somewhat indurated; thin stringers of clay, light-gray, micaceous ______ ______ 30 290 Clay: dark-gray to black, carbonaceous, glauconitic, micaceous (finely disseminated) _ 20 310 Limestone: gray, dense, crystalline, sandy, fossiliferous (casts and molds of megafossils and occasional bryozoan remains)_ _ 50 360 Upper Cretaceous: Providence and Ripley (Undifferentiated): Sand: fine to coarse-grained, angular__ 20 380 Sand: as above; marl, bluish-gray, silty, micaceous, fossilifer- ous (megafossils and Foraminifera at depth) ______ _ 70 450 Anomalina pseudopapillosa at 420-430. Summary: Residuum _ __ ___________ 20 20 Upper Eocene (Ocala limestone) ___ _ 26 46 Middle Eocene (Lisbon formation) __ 44 90 Middle Eocene (Tallahatta formation) ____ 110 200 Lower Eocene (Wilcox, undifferentiated) __ 60 260 Paleocene (Clayton formation) ____ _____________________________ 100 360 Upper Cretaceous (Providence and Ripley, undifferentiated) _ 90 450 Potential Water-Bearing Zones: Sand: fine to medium-grained Limestone __ Sand: fine to coarse-grained _ 30 290 50 360 20 380 SUMTER COUNTY Location: In Americus Well No.: GGS 147 Owner: City of Americus Elev.: 412 Driller: Layne-Atlantic Company Drilled: 1947 Thickness Depth -------------------------------------------------(f-ee-t)-- (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: mottled, sandy, limonitic; tongues of sand, fine to me- dium-grained, angular ___ ___ _____________ _____________ _ 37 37 Sand: fine to coarse-grained, angular 52 89 360 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Lower Eocene: Wilcox Group (Undifferentiated): Thickntss (feet) Clay: light-gray, silty, micaceous, iron-stained__ 20 Clay: dark-gray to black, silty, micaceous, carbonaceous, glauconitic -------------------------------------------------------------------------------------------- 38 Depth (feet) 109 147 Paleocene: Midway Group: Clayton Formation: Clay: white to pink (mottled), bauxitic?, micaceous, sandy __ 19 166 Sand: fine to coarse-grained, subangular ____________ _ 4 170 Limestone: gray, dense, crystalline, sandy, fossiliferous (meg- afossils and some bryozoan remains)______________ _ 40 210 Upper Cretaceous: Providence and Ripley (Undifferentiated): Clay: gray, blocky, micaceous______ _ 11 221 Sand: fine to coarse-grained, angular__ 60 281 Marl: gray, silty, micaceous; some sand, as above__ 46 327 Limestone: gray, dense, crystalline, very sandy__ 25 352 Marl: gray, sandy, chalky, micaceous, fossiliferous (some microfossils) ; interbedded sand, fine to medium-grained, angular -------------------------------- ----------------------- __________________ _ 274 626 Anomalina pseudopapillosa at 352-358. Sand: fine to coarse-grained, angular; interbedded clay or shale, dark-brown, fissile, silty, lignitic, highly micaceous 360 986 Summary: Middle Eocene (Tallahatta formation) _____ 89 89 Lower Eocene (Wilcox group, undifferentiated)_ 58 147 In Paleocene (Clayton formation)__________________ ___________________ _ 63 210 Upper Cretaceous (Providence and Ripley, undifferentiated) __ 776 986 Potential Water-Bearing Zones: Sand: fine to coarse-grained_____ Limestone _ ______________ _ Sand: fine to coarse-grained____ Sand: fine to coarse-grained 3 169 37 210 60 281 100 726 Remarks: Owing to ground-water discharge (springs) and local rather rugged topography, all prospective aquifers occurring at depths of less than 200 feet below land surface are possibly dry and not good risks as sources of ground water. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 361 Location: At Aries Owner: Dayton Veneer and Lumber Company Driller: Layne-Atlantic Company Drilled: 1948 SUMTER COUNTY Well No.: GGS 215 Elev.: 463 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: brick-red, very sandy, limonitic _______________________________ 33 33 Clay: light-gray to tan to red (mottled), sandy, limonitic 20 53 Sand: fine to coarse-grained, subangular_____________________________________ 82 135 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, sandy, carbonaceous, micaceous_ 30 165 Paleocene: Midway Group: Clayton Formation: Clay (or kaolin) : white to light-gray, sandy, abundantly side- ritic, micaceous, bauxitic?_ 38 203 Clay: light to dark-gray, silty, abundantly glauconitic, car- bonaceous, micaceous _______ ------------------------------ __________________ 16 219 In Upper Cretaceous: Providence and Ripley (Undifferentiated): Marl: gray, silty, micaceous, glauconitic, fossiliferous at depth (Foraminifera); interbedded limestone, gray, dense, crys- talline, sandy, fossiliferous (macroshells) _________________ _ 167 386 Limestone prominent at 262-275. Limestone prominent at 342-375. Anomalina pseudopapillosa at 375-386. Summary: Middle Eocene (Tallahatta formation)_________________________ ___________________ 135 135 Lower Eocene (Wilcox group, undifferentiated)_______________________________ 30 165 Paleocene (Clayton formation)____ ----------------~------------- 54 219 In Upper Cretaceous (Providence and Ripley, undifferentiated)____ 167 386 Potential Water-Bearing Zones: Sand: fine to coarse-grained ___ -------------------------------------------------~------~--- 55 135 Sand: fine to coarse-grained----------------------------------------------------~------------- 58 342 362 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 1.5 miles northeast of Plains, 4.2 miles west of New Point Flag Station, 0.1 mile south of Highway 280 Owner: No. 1 Southwestern Georgia Experiment Station Driller: Layne-Atlantic Company Drilled: March 1952 SUMTER COUNTY Well No.: GGS 280 Elev.: 513 Thickness Depth (feet) (feet) No samples ____________________________________________________________________________________________ 5 5 In Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: mottled, sandy, limonitic__ ------------------------------ _________________ 33 38 Sand: fine to coarse-grained, angular__ 57 95 Lower Eocene: Wilcox Group (Undifferentiated): Clay: gray, sandy, carbonaceous, glauconitic at depth 49 144 Summary: No samples ---------------------------------------------------In middle Eocene (Tallahatta formation) Lower Eocene (Wilcox group, undifferentiated) 5 5 90 95 49 144 Potential Water-Bearing Zones: Sand: fine to coarse-grained__________________________________________ 57 95 Location: Americus, on west side of Lee Street Rd., opposite Country Club, 0.8 mi. north of Mill Creek Bridge, and about 20 west of southwest corner of dwelling Owner: No.1 Old Peoples (County) Home Driller: Layne-Atlantic Company Drilled: March 1952 SUMTER COUNTY Well No.: GGS 281 Elev.: 391 Thickness Depth (feet) (feet) No samples __________________________________________ 5 5 Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: brick-red, sandy, limonitic _________________________ _ 7 12 Sand: fine to coarse-grained, subangular; interbedded clay, pale-green, somewhat micaceous, sandy __ 108 120 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 363 Lower Eocene: Wilcox Group (Undifferentiated): Thickness (feet) Clay: gray, silty, micaceous, carbonaceous, glauconitic__ _ 7 Sand: fine to coarse-grained, glauconitic, fossiliferous (a coquina but not consolidated)____________________________________________________________ 33 Depth (feet) 127 160 Paleocene: Midway Group: Clayton Formation: Limestone: gray, dense, crystalline, sparsely glauconitic, fos- siliferous (megafossils and some bryozoan remains) ; some clay, black, fissile, carbonaceous, micaceous (finely dis- seminated) ____ ---------------------------------- 30 190 Sand: medium-grained, angular; some marl, gray, silty, mi- caceous ____ _ 17 207 Summary: No samples _ ______________________________ _ In middle Eocene (Tallahatta formation)_ Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) __ 5 5 115 120 40 160 47 207 Potential Water-Bearing Zones: Sand: fine to coarse-grained____ _ Limestone Sand: medium-grained _______ 33 160 30 190 10 207 Location: 2 mi. south of Flintside grade crossing of S.A.L. R.R., about 100 yds. west of county road, 40 north of dwelling Owner: No. 1 Trim Porter Driller: F. P. Jones Drilled: March 1952 SUMTER COUNTY Well No.: GGS 283 Elev.: 322 Thickness Depth (feet) (feet) Residuum: Sand: medium to coarse-grained, angular, limonitic 30 30 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: yellow, much calcitized, somewhat crystalline, sparsely glauconitic (at depth), fossiliferous (macroshells, bryozoan remains, and some Foraminifera) __ 100 130 Siphonina jacksonensis at 40-50. Lepidocyclina sp., Operculinoides sp. at 80-90. 364 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: In Residuum _______________ -----------------------------------------Upper Eocene (Ocala limestone) ________ Thickness Depth (feot) (feet) 30 30 100 130 Limestone Potential Water-Bearing Zones: 90 130 Location: In Plains Owner: City of Plains Driller: Layne-Atlantic Company Drilled: March 1952 SUMTER COUNTY Well No.: GGS 291 Elev.: 502 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: mottled, very sandy, limonitic______ Sand: fine to coarse-grained, angular_________ Clay: olive-green to red (mottled), sandy 30 30 50 80 10 90 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, glauconitic, carbonaceous, micaceous_ Sand: fine to coarse-grained, subangular, glauconitic__ 50 140 14 154 Paleocene: Midway Group: Clayton Formation: Clay: black, somewhat fissile, carbonaceous, micaceous ____ _ 15 169 Sand: fine-grained, indurated at certain levels, glauconitic_ 45 214 Clay: gray, carbonaceous, micaceous; interbedded limestone, gray, crystalline, glauconitic, fossiliferous (macroshells and some bryozoan remains) ____________ _ 28 242 Limestone: as above 21 263 Summary: Middle Eocene (Tallahatta formation) Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) ____________________________ _ 90 90 64 154 109 263 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 365 Potential Water-Bearing Zones: Thickness (feet) Sand: fine to coarse-grained_________________________________________________________________ 14 Sand: fine to coarse-grained___________________________________________________________________ 45 Limestone __________ ------------------------------------------------------------------------------------ 21 Depth (feet) 154 214 263 Remarks: More productive aquifers (of Upper Cretaceous age) are available below 263. Location: % mi. northeast of Shiloh School, at dwelling Owner: No.1 Smith Moore Driller: Southeastern Drilling Company Drilled: 1952 SUMTER COUNTY Well No.: GGS 296 Elev.: 509 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Sand: fine to coarse-grained, angular; interbedded clay, pale- green to tan to red (mottled), micaceous, limonitic____________________ 140 140 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, micaceous, abundantly glauconitic__________ 14 154 Summary: Middle Eocene ( Tallahatta formation) ___________________________________ Lower Eocene (Wilcox group, undifferentiated) _______________ 140 140 14 154 Potential Water-Bearing Zones: Sand: fine to coarse-grained__ 40 140 Location: At Spring Creek, near swimming pool, at first road south of grocery Owner: No. 1 C. E. Pelcher Driller: F. P. Jones Drilled: May 1952 SUMTER COUNTY Well No.: GGS 303 Elev.: 247 Thickness Depth (feet) (feet) Residuum: Clay: dark-brown, sandy, lignitic, and fragments of residual limestone _ ----------------------------------------------------------------------------- 30 30 366 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Upper Eocene: Jackson Group: Ocala Limestone: Thickness (feet) Sand: fine to coarse-grained, somewhat indurated, glauconitic at depth, fossiliferous (macroshells)__ ____________ 40 Depth (feet) 70 Middle Eocene: Claiborne Group: Lisbon Formation: Marl: gray, glauconitic, fossiliferous (macroshells, bryozoan remains, and Foraminifera); some sand, as above_____________________ 20 90 Asterigerina sp., Cibicides westi at 80-90. Limestone: gray, coarsely glauconitic, sandy; some marl, as above ---------------------------------------- ---------------- -------------- 20 110 Tallahatta Formation: Sand: fine to medium-grained, fossiliferous (macroshells) 30 140 Summary: Residuum ________________________________________ Upper Eocene (Ocala limestone) _______ Middle Eocene (Lisbon formation)_ Middle Eocene (Tallahatta formation) 30 30 40 70 40 110 30 140 Potential Water-Bearing Zones: Sand: fine to coarse-grained_______ 30 140 Location: Near intersection of Virginia and Harold Sts., opposite City High School, east side of Harold St., in Americus Owner: City of Americus Driller: Layne-Atlantic Company Drilled: January 1953 SUMTER COUNTY Well No.: GGS 333 Elev.: 380 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: mottled, sandy, limonitic________________________________________________ Sand: fine to coarse-grained, subangular, limonitic_____ Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, carbonaceous, micaceous 30 30 32 62 34 96 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 367 Thickness (feet) Clay: dark-gray, silty, micaceous, abundantly glauconitic, fossiliferous (some Foraminifera) ------------------------------------------------------ 12 Robulus sp., Valvulineria scrobiculata, Eponides dorfi at 96-108. Sand: fine to coarse-grained, subangular, arkosic; relatively thin stringers of clay (or fuller's earth), light-gray, silty, blocky, carbonaceous, micaceous ____________________________________ 62 Depth (feet) 108 170 Paleocene: Midway Group: Clayton Formation: Clay (or fuller's earth) : as above; some fissile clay, black, carbonaceous, micaceous, fossiliferous (some Foraminifera)_ 26 196 Ammobaculites sp., Nodosaria a/finis, Robulus sp., Eponides lotus, Discorbis midwayensis, Cibicides newmanae, Cibicides howelli at 190-198. Limestone: light-gray, dense, crystalline, sandy, glauconitic at depth, fossiliferous (casts and molds of megafossils, bryo- zoan remains, and Foraminifera) _________________________________________________ 18 214 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Clay or kaolin: light-gray, somewhat waxy, blocky__ 4 218 Sand: fine to coarse-grained, angular, grains of "rose quartz"____ 14 232 Marl: dark bluish-gray, chalky, silty, micaceous, fossiliferous (some macro- and microfossils at certain levels); inter- bedded sand, fine to medium-grained _ 58 290 Epistomina camcolla at 238-280. Limestone: gray, dense, crystalline, sandy_ 14 304 Marl: as above, sandier with depth 18 322 Sand: fine to coarse-grained, angular; interbedded marl, as above 27 349 Marl: as above 33 382 Sand: fine to coarse-grained, angular; interbedded marl, as above 44 426 Marl: as above; interbedded sand, fine to medium-grained, angular ___ _______________ __________________ 36 462 Sand: fine to coarse-grained, angular____________________ 8 470 Sand: fine to medium-grained, angular; interbedded marl, as above _____ ---------------- 70 540 Sand: fine to coarse-grained, angular________________________________________________ 20 560 368 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Marl or shale: dark-brown, somewhat fissile, silty, carbonaceous, highly micaceous__________________________________ __ ___________ __________________ 19 Depth (feet) 579 Sand: fine to coarse-grained, angular; interbedded marl, dark-brown, fissile, carbonaceous, silty, highly micaceous 405 984 Summary: Middle Eocene (Tallahatta formation) _____ _ Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) _____________ _ Upper Cretaceous (post-Tuscaloosa, undifferentiated) ______ 62 62 108 170 44 214 770 984 Potential Water-Bearing Zones: Sand: fine to coarse-grained___________ ----------------------------------------- ______________ 8 170 Sand: fine to coarse-grained__________________________________________________________________ 14 232 Sand: fine to coarse-grained___________________________________________________________________ 10 332 Sand: fine to coarse-grained_____ ------------------------- _____________ 9 349 Sand: fine to coarse-grained________________________________ 12 394 Sand: fine to coarse-grained_________________________________________________________ 10 408 Sand: fine to coarse-grained________________________________________ 8 470 Sand: fine to coarse-grained_____________________________________________ 15 604 Sand: fine to coarse-grained ______________________________________________________________ 6 630 Sand: fine to coarse-grained____________ ------------------------------ ___________ 8 692 Sand: fine to coarse-grained____________________________________________________________________ 26 754 Sand: fine to coarse-grained____________________________________________________________________ 42 800 Sand: fine to coarse-grained____________________________________________________________________ 24 914 Remarks: Owing to local rugged topography, all relatively shallow-lying aquifers are probably dry through ground-water leakage (i.e. spring discharge) and are doubtful sources of ground water. Location: In Andersonville Owner: No. 1 City of Andersonville Driller: Layne-Atlantic Company Drilled: April 1953 SUMTER COUNTY Well No.: GGS 342 Elev.: 412 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: mottled, sandy, limonitic___________________________________________________________ 23 23 Sand: fine to medium-grained, angular____________ 60 83 Sand: coarse-grained, angular____________________________________________________________ 5 88 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 369 Lower Eocene and Paleocene (Undifferentiated): Thickness (feet) Clay: tan, sandy, micaceous _______ 5 Clay: gray, silty, micaceous, lignitic; some clay, bauxitic?, white to pink (mottled), micaceous__ _____________________ _ 10 Clay: gray, sandy, micaceous, lignitic__ 10 Clay: white to pink (mottled), bauxitic?, micaceous_ 20 Clay: dark-gray to black, glauconitic, micaceous 3 Clay: light-gray, micaceous___ 5 Limestone: gray, dense, crystalline, glauconitic, fossiliferous (megafossils and bryozoan remains) __ _ 41 Depth (feet) 93 103 113 133 136 141 182 Upper Cretaceous: Providence Sand: Clay: red, micaceous, sideritic__ 13 195 Sand: coarse-grained, angular, many grains of "rose quartz"____ _ 21 2Hi Summary: Middle Eocene (Tallahatta formation)-------------------------------Lower Eocene and Paleocene (undifferentiated) __ Upper Cretaceous (Providence sand) _____________________ 88 88 94 182 34 216 Potential Water-Bearing Zones: Sand: fine to coarse-grained____ 21 216 Location: Near Americus Owner: No. 1 International Minerals Corp. Driller: Southeastern Drilling Company SUMTER COUNTY Well No.: GGS 440 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: olive-green to tan to red (mottled), very sandy, limonitic__ 10 10 Lower Eocene: Wilcox Group (Undifferentiated): Sand: fine to medium-grained, subangular, glauconitic; clay, dark-gray, micaceous, silty, carbonaceous____________________________________ 30 40 370 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Clay: dark-gray, micaceous, glauconitic, fossiliferous at depth (some Foraminifera) --------------------------------------------------------------------- 10 Robulus wilcoxensis, Valvulineria scrobiculata, Cibicides howelli, Cibicides newmanae at 40-50. Depth (feet) 50 Paleocene: Midway Group: Clayton Formation: Clay: white, micaceous, bauxitic?, sandy__ 10 60 Sand: fine to medium-grained, subangular; some clay, as above__ 10 70 Clay: black, fissile, glauconitic, fossiliferous; limestone, gray, nodular, dense (calcitized), fossiliferous (bryozoan remains, molds and fragments of macroshells, and Foraminifera); sand and kaolin as above____ 10 80 Eponides dorfi, Discorbis midwayensis var. trinitatensis, Siphonina wilcoxensis, Alabamina wilcoxensis, Cibicides howelli, Cibicides praecursorius at 70-80. Limestone: light-gray, calcitized, nodular, sandy, glauconitic at depth, fossiliferous (molds and fragments of macroshells, bryozoan remains, Ostracods and Foraminifera)_ 35 115 Marl: bluish to light-gray, silty, micaceous, fossiliferous_ 15 130 Siphonina prima, Cibicides howelli, Anomalina umbonifera at 120-130. Limestone: gray, dense (calcitized), coarsely glauconitic and sandy at depth, fossiliferous _____________________ _ 30 160 Eponides lotus, Discorbis midwayensis, Siphonina wilcoxensis, Siphonina prima, Gyroidina aequilateralis, Planulina nacatochensis, Cibicides praecursorius at 130-140. Limestone: as above; fragments of marl, gray, silty, micaceous __ 10 170 Upper Cretaceous: Providence and Ripley (Undifferentiated): Sand: fine to coarse-grained, angular 30 200 Marl: light-gray, silty, glauconitic, micaceous, lignitic, pyriti- ferous, fossiliferous (macroshells, Ostracods and Foramini- fera); some sand, as above but decreasing with depth _____________ 40 240 Epistomina caracolla, Anomalina pseudopapillosa at 210-220. Summary: Middle Eocene (Tallahatta formation)_______________________________________________ 10 10 Lower Eocene (Wilcox group, undifferentiated)-------------------------------- 40 50 Paleocene (Clayton formation)----------------------------------------------------------- 120 170 Upper Cretaceous (Providence and Ripley, undifferentiated)________ 70 240 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 371 Potential Water-Bearing Zones: Limestone ___ Limestone _ _________________________________ _ Sand: fine to coarse-grained_________ _ Thickness (feet\ Depth (feet) 30 110 30 160 30 200 Location: 4 mi. southwest of Americus, Land Lot 210, Land District 17 Owner: No.1 Walter Stevens Driller: Flinn-Austin et al Drilled: June 1955 SUMTER COUNTY Well No.: GGS 442 Elev.: 431 Thickness Depth (feet) (feet) Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: brick-red, very sandy, limonitic____ _ Sand: medium to coarse-grained, angular_____ Sand: as above; some clay, tan to red (mottled), sandy 20 20 30 50 25 75 Lower Eocene: Wilcox Group (Undifferentiated): Clay: gray, sandy, micaceous, glauconitic, lignitic, pyritiferous__ 25 100 Sand: fine to medium-grained, angular, glauconitic; some clay, as above_____ ______________ _____________________ 55 155 Glauconite abundant at 140-150. Paleocene: Midway Group: Clayton Formation: Clay: black, fissile, carbonaceous, micaceous (finely dissemi- nated) _________ -------------------------------------------------------------------- _________________ 15 170 Limestone: gray, dense, crystalline, sandy, fossiliferous (frag- ments, casts and molds of megafossils, and some bryozoan remains) _____________________ _____________ ______________ 95 265 Sand: fine to coarse-grained, angular_ 10 275 In Upper Cretaceous: Providence and Ripley (Undifferentiated): Sand: fine to coarse-grained, angular_ __________________________________________ 25 300 Marl: dark bluish-gray, silty, micaceous, pyritiferous, fossil- iferous (some Foraminifera)---------------------------------------------------------- 50 350 Epistomina sp., Anomalina pseudopapillosa at 300-310. 372 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Indurated sand: fine to medium-grained, angular, fossiliferous (a coquina)---------------------------------------------------------- 25 Sand: fine to medium-grained, angular; interbedded marl, as above ---------------------------------------------------------------------------------------------------- 285 Robulus sp. common at 430-440. Gaudryina rudita, Cibicides harperi at 440-450. Loxostoma plaitum at 490-500. Depth (feet) 375 660 Marl: as above; interbedded sand, fine to coarse-grained, angular ---------------------------------------------------------------------------------- 240 900 In Cusseta, Blufftown, and Eutaw (Undifferentiated): Clay or shale: brown, somewhat fissile, carbonaceous, highly micaceous, silty; interbedded sand, fine to coarse-grained, indurated locally ----------------------------------- ------------------------------------------- 735 1,635 In Tuscaloosa Formation: Sand: coarse-grained, angular, arkosic; interbedded clay, pale-green to red (mottled), micaceous, sandy________ 205 Sand: coarse-grained, angular, arkosic; interbedded clay, pale-green to red (mottled) , sandy, micaceous __________________________ 23 0 Sand: fine-grained, lignitic, micaceous__________________________________________ 70 Clay: mottled, waxy, sandy, micaceous, sideritic___ 70 Sand: coarse-grained, angular, arkosic 220 1,840 2,070 2,140 2,210 2,430 Summary: Middle Eocene (Tallahatta formation) ________________ --------------------------------- 75 Lower Eocene (Wilcox group, undifferentiated) ________________________________ 80 Paleocene (Clayton formation)------------------------------------------------------------- 120 In Upper Cretaceous (Providence and Ripley, undifferentiated) ____ 625 In Upper Cretaceous (Cusseta, Blufftown, and Eutaw, undiffer- entiated) -------------------------------------------------------------------------------------------- 735 In Upper Cretaceous (Tuscaloosa formation) __ 795 75 155 275 900 1,635 2,430 Potential Water-Bearing Zones: Sand: fine to medium-grained_______________________________________________________________ 50 150 Limestone ___ ----------------------------------------------------------------------------------------------- 95 265 Sand: fine to coarse-grained__________________________________________________________________ 35 300 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 373 Remarks: Additional water-bearing sands occur below a depth of 300 feet, but will have to be determined by more exact means than can be done on the basis of cuttings on which the above log is based. The electric log of this well would furnish such exacting information, but, so far, this log has not yet been released for this well. Location: Americus Owner: No. 1 Sweet Potato House Driller: Southeastern Drilling Company Drilled: 1956 SUMTER COUNTY Well No.: GGS 504 Thickness Depth (feet) (feet) Residuum: Sand: fine-grained, argillaceous, limonitic Clay: pale-green to red (mottled), sandy ______________ Sand: fine to coarse-grained, angular__ _ 10 10 10 20 10 30 Middle Eocene: Claiborne Group: Tallahatta Formation: Clay: pale-green to red (mottled) , sandy, blocky__________ Sand: coarse-grained, angular 10 40 10 50 Lower Eocene: Wilcox Group (Undifferentiated): Clay: olive-green to tan to red (mottled), very sandy, glau- conitic ___________ ___ ______________ __ _______________ ------------- ___ 10 60 Clay: bluish-gray, fissile, sandy, glauconitic 40 100 Glauconite very abundant at 90-100. Paleocene: Midway Group: Clayton Formation: Sand: coarse-grained; some clay, as above ________ _ 50 150 Clay: light to dark-gray to black, somewhat blocky; sand, as above ___________________ _ 10 160 Sand: coarse-grained, subangular 10 170 Clay: black, fissile, finely micaceous; some sand as above ________ 10 180 Limestone: gray, dense (much calcitized), somewhat sandy, glauconitic, fossiliferous (fragments and molds of macro- shells, bryozoan remains, Ostracods, and Foraminifera) ____ 30 210 Robulus degolyeri, Robulus midwayensis, Siphonina wilcoxensis, Eponides lotus, Discorbis rnidwayensis var. trinitatensis, Anomalina umbonifera, Cibicides howelli, Cibicides praecursorius at 180-190. 374 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: coarse-grained to finer-grained at depth, angular, ar- kosic _ __ ------------------------------------------------------------------------------- 20 Depth (feet) 230 Upper Cretaceous: Providence and Ripley (Undifferentiated): Sand: fine-grained -------------------------------------------------------------------------------- 10 240 Sand: as above; clay, light-gray, silty, micaceous, more py- ritiferous and fossiliferous at depth________________ ______________ 50 290 Anomalina pseudopapillosa at 280-290. Sand: gray, medium-grained, indurated, fossiliferous (frag- ments and molds of macroshells)'____________________________ _________________ 50 340 Marl: dark-gray, silty, micaceous, fossiliferous_____ 70 410 Epistomina caracolla, Planulina correcta, Planulina nacatochensis at 340-350. Summary: Residuum __________________________ __________________ 30 30 Middle Eocene (Tallahatta formation)_ 20 50 Lower Eocene (Wilcox group, undifferentiated)______________________________ 50 100 Paleocene (Clayton formation)_ __ _________________________ _______________ 130 230 Upper Cretaceous (Providence and Ripley, undifferentiated) 180 410 Potential Water-Bearing Zones: Sand: coarse-grained _________ ________ ___________________ Sand: fine to coarse-grained ___________ _ Limestone ________________________________ Sand: fine to coarse-grained______ 10 50 50 150 30 210 20 230 Location: Near Geneva Owner: No. 1 Geneva School Driller: Layne-Atlantic Company Drilled: September 1954 TALBOT COUNTY Well No.: GGS 403 Elev.: 575 Thickness Depth (feet) (feet) Upper Cretaceous: Tuscaloosa Formation: Sand: yellow to light-tan, somewhat argillaceous, fine to coarse-grained, angular ___ ____ ___________ _ 5 5 Clay (or kaolin) : white to gray to red (mottled), very sandy, arkosic _ 13 18 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 375 Thicknes:.:; (feet) Sand: fine to coarse-grained, somewhat argillaceous, arkosic ____ 15 Clay (or kaolin): white to gray to red (mottled), sandy_____ 11 Clay: tan to olive-green to red (somewhat mottled), mica- ceous, sandy, arkosic_____________________ -------------------------------- 54 Sand: medium to coarse-grained, angular, arkosic .. 38 Clay: brick-red, very sandy, micaceous_______ 10 Sand: medium to coarse-grained, angular, arkosic 11 Sand: as above but somewhat argillaceous ___ 19 Depth (feet) 33 44 98 136 146 157 176 Summary: Upper Cretaceous (Tuscaloosa formation) __ _ 176 176 Potential Water-Bearing Zones: Sand: fine to coarse-grained _________________ _ Sand: medium to coarse-grained__ Sand: medium to coarse-grained___ 15 33 38 136 11 157 Location: North side of prison yard, few yards east of elevated steel water tank, at Tattnall State Prison Owner: No.2 Tattnall State Prison Driller: Virginia Machine and Well Company Drilled: 1949 TATTNALL COUNTY Well No.: GGS 180 Elev.: 187 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, arkosic, finely disseminated phosphatic grains; some gray clay and white kaolin _________________ 30 30 Miocene (Undifferentiated): Clay: pale-green, sandy; interbedded sand, fine to coarse- grained, arkosic, phosphatic at depth__ ______________ _ 70 100 Gray phosphatic pebbles prominent at 90-100. Clay: gray to pale-green, sandy, phosphatic__ 40 140 Sand: fine to coarse-grained, phosphatic_____ 40 180 Clay: pale-green, sandy, phosphatic 20 200 376 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Clay: as above; interbedded limestone, white, rather dense (much calcitized), sandy, phosphatic; sand, fine to coarse- grained, phosphatic ---------------------------------------------------------------------------- 210 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; sand, as above________________________________________________________________ 50 Macroshells prominent at 430-440. Indurated sand: fine to medium-grained, coarsely phosphatic______ 10 Limestone: white, dense (much calcitized), very sandy, phosphatic __ ___ _______ -------------------------------- ____ __________ _________ _______ ____ ___ 10 Depth (feet) 410 460 470 480 Oligocene (Undifferentiated): Limestone: cream, fossiliferous (bryozoan remains and Fora- minifera) -------------------------------------------------------------------------------------------- 20 500 Dictyoconus1 sp., Asterocyclina1 sp., Asterigerina cf. A. subacuta, Spiroloculina sp., Discorbis byramensis, Gypsina globulal, Reusella oligocenica, Operculinoides1 sp. at 480490. Lepidocyclina sp., Siphonina advena, Asterocyclina cf. A. nassauensis1 at 490-500. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: as above; fragments of limestone, light gray, crys- talline (much calcitized), fossiliferous (common to abun- dant bryozoan remains and Foraminifera)____________ ______________ _ 20 520 Operculinoides sp., Gypsina globula at 500-510. Asterocyclina sp. at 510-520. Limestone: light-gray, crystalline (much calcitized) , fossil- iferous (abundant bryozoan remains and Foraminifera)__________ 300 820 Asterocyclina nassauensis, Pseudophragmina flintensis, Gypsina globula at 540-550. Summary: Pliocene to Recent (undifferentiated) Miocene (undifferentiated) ____ Oligocene (undifferentiated) __________ Upper Eocene (Ocala limestone) _ 30 30 450 480 20 500 320 820 Potential Water-Bearing Zones: Sand: fine to coarse-grained____________________________________________________________________ 40 180 Limestone __ __ ________ 320 820 Samples of poor quality. Remarks: 1 Reworked ( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 377 Location: At Reidsville Prison Owner: Reidsville Prison Driller: Layne-Atlantic Company Drilled: 1956 TATTNALL COUNTY Well No.: GGS 522 Elev.: 187 Thickness Depth (feet) (feet) No samples ----------------------------- 190 190 In Miocene (Undifferentiated): Clay: yellowish-green, sandy, phosphatic; interbedded sand, fine to coarse-grained, phosphatic________________________________________ _________ 80 270 Clay and sand: as above; interbedded limestone, white, sandy__ 70 340 Limestone: white, dense (much calcitized), sandy 50 390 Clay: yellowish-green to pink (mottled), sandy 65 455 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic, fossiliferous (casts and impressions of megafossils 40 495 Limestone: gray, extremely dense (much calcitized), sandy, coarsely phosphatic, fossiliferous (casts and impressions of megafossils) _______ ------------------------------------ 10 505 Oligocene (Undifferentiated): Limestone: pinkish-brown, massive (much calcitized), nodu- lar, somewhat oolitic, fossiliferous (Foraminifera) 20 525 Cibicides americanus at 505-515. Pyrgo sp., Asterigerina subacuta, Rotalia byramensis var., Quinqueloculina sp. at 515-525. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray, crystalline (much calcitized), fossili- ferous (bryozoan remains and Foraminifera) 153 678 Operculinoides sp. at 525-538. Asterocyclina sp., Gypsina globula at 538-548. Asterocyclina nassauensis, Pseudophragmina flintensis at 578-588. Summary: No samples _______________________ _ In. Miocene (undifferentiated) ___ Oligocene (undifferentiated) Upper Eocene (Ocala limestone) _______________________ 190 190 315 505 20 525 153 678 Limestone Potential Water-Bearing Zones: 153 678 378 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Few miles south of Cobbtown Owner: No. 1 Troy Jarriel Operator: Turner Well Drilling Company Date: September 1959 TATTNALL COUNTY Well No.: GGS 583 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: pale-yellowish-green with tan to red to purple (mot- tled) streaks, sandy, limonitic ___ ------------------------------- __________________ 42 42 Sand (or very sandy clay): fine-grained, subangular, finely disseminated very small jet-black grains____________________________________ 21 63 Clay: yellowish-green, blocky, very sandy, cherty at depth ________ 121 184 Clay: as above; interbedded with some few beds of limestone, white to cream, sandy, jet-black phosphatic pebbles at depth____ 102 286 Sand: fine-grained, subangular grains, phosphatic, as in in- terval 42-63 ---------------------------------------------------------------------------------- 21 307 Greenish-brown chert prominent at 286-307. Indurated sand (or coquina): fine-grained, subangular, phos- phatic, fossiliferous (macroshells); interbedded clay, yel- lowish-green, rather tough, partially indurated, sandy__ _ 205 512 First observed macroshells at 307-327. Indurated sand and clay: as above; interbedded limestone, cream, very sandy, phosphatic, fossiliferous (macroshells) ____ 61 573 Limestone: light-brown, somewhat dolomitic ( ?) , saccha- roidal, very sandy, phosphatic 61 634 Oligocene (Undifferentiated): Limestone: light-gray to cream (latter at depth), much leached (weathered?), nodular (when fresh and unweath- ered), rather soft, loosely consolidated, sandy, fossiliferous (some echinoid and bryozoan remains and Foraminifera) 41 675 Rotalia mexicana var., Gypsina globula1 at 634-655. Summary: Miocene (undifferentiated) ______ Oligocene (undifferentiated) __ 'Reworked(?) fossil of middle Eocene age. 634 634 41 675 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 379 Potential Water-Bearing Zones: None observed to total depth (675). Thickness Depth (feet) (feet) Remarks: This well represents the thickest section of deposits of Miocene so far observed by the writer. It seems probable, therefore, that this well might have penetrated water-bearing limestones by going deeper (possibly 100 to 150 feet deeper than 675 feet). Location: 1 mi. south of Rupert on Highway 19 Owner: No.2 Jule Cooper Driller: R. G. Duke Drilled: November 1954 TAYLOR COUNTY Well No.: GGS 428 Thickness Depth (feet) (feet) No samples 60 60 In Upper Cretaceous (Undifferentiated): Sand: fine to medium-grained, angular, arkosic, limonitic 20 80 Sand: fine to coarse-grained, angular, limonitic; inclusions of kaolin, white, micaceous ____ _ 80 160 Sand: fine to coarse-grained, angular, arkosic 20 180 Summary: No samples ______________ _ In Upper Cretaceous (undifferentiated) 60 60 120 180 Potential Water-Bearing Zones: Sand: fine to coarse-grained 20 180 Location: 1 mi. south of Mauk on State Highway 127, at private dwelling Owner: No. 1 B. S. Parker Driller: R. G. Duke Drilled: May 1956 TAYLOR COUNTY Well No.: GGS 492 No samples ___ 40 40 In Upper Cretaceous (Undifferentiated): Sand: fine to medium-grained, angular, arkosic; some kaolin, white to pink (somewhat mottled), micaceous 10 50 380 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Kaolin: white, micaceous, sandy at depth ___ Thickness (feet) 50 Clay: reddish-brown, very sandy, micaceous 10 Sand: fine to coarse-grained, angular, arkosic 50 Clay: gray to pink (somewhat mottled), micaceous, sandy ________ 10 Sand: fine to medium-grained, angular, arkosic _ 30 Depth (feet) 100 110 160 170 200 Summary: No samples ___ _____________________ In Upper Cretaceous (undifferentiated) _____ 40 40 160 200 Potential Water-Bearing Zones: Sand: fine to medium-grained ______ - 30 200 Remarks: Additional aquifers can be penetrated in the Tuscaloosa formation beneath the bottom of this well. Location: 3.5 to 4 mi. north of Mauk on Atlantic Coast Line R.R. in Norwich Owner: No.1 W. R. Turner Driller: R. G. Duke Drilled: December 1955 TAYLOR COUNTY Well No.: GGS 499 Thickness Depth (feet) (feet) No samples 40 40 In Upper Cretaceous (Undifferentiated): Sand: medium-grained, angular, some kaolin, white, micaceous__ 10 50 Sand: fine to medium-grained, angular, arkosic ____ 70 120 Sand: medium to coarse-grained, angular, arkosic 10 130 Summary: No samples __ ___ ______________ _ In Upper Cretaceous (undifferentiated) __ 40 40 90 130 Potential Water-Bearing Zones: Sand: medium to coarse-grained ______ 10 130 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 381 Location: 5 mi. south of Butler Owner: No. 1 F. B. Green Driller: R. G. Duke Drilled: 1955 TAYLOR COUNTY Well No.: GGS 533 Thickness Depth (feet) (feet) No samples 40 40 In Upper Cretaceous (Undifferentiated): Sand: fine to coarse-grained, angular, arkosic; interbedded kaolin _______________ 110 150 Sand, fine to coarse-grained with some kaolin, white, to pink, micaceous, at 60-70. Sand with kaolin as above at 100-110. Summary: No samples In Upper Cretaceous (undifferentiated) ____ ------------------------------ 40 40 110 150 Potential Water-Bearing Zones: Sand: fine to coarse-grained 10 150 TELFAIR COUNTY Location: 588 ft. from southwest line, 410 ft. from southeast line of Land Lot 260, 7th Land District Owner: No. 1 Henry Spurlin Driller: Parsons and Hoke Drilled: September 1953 Well No.: GGS 375 Elev.: 242 (derrick floor) Thickness Depth (feet) (feet) No samples 30 30 In Miocene (Undifferentiated): Sand: fine to coarse-grained, subangular; interbedded clay, pale-green, sandy ____ ------------------------------------------------- 195 225 382 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness D_!!pth (feet) (feet) Limestone: white to light-gray, cream at depth, much calci- tized, somewhat saccharoidal, nodular, fossiliferous (echi- noid and bryozoan remains and some Foraminifera) _______ 90 315 Quinqueloculina sp., Pyrgo sp., Rotalia mexicana var. at 225-240. Dictyoconus1 sp., Lepidocyclina1 sp. at 300-330. In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray, much calcitized, crystalline, fossili- ferous (echinoid and bryozoan remains and Foraminifera) 75 390 Operculinoides sp. common at 330-360. Asterocyclina sp. common at 360-390. No samples 90 480 Limestone: cream, rather soft, chalky, somewhat granular, fossiliferous (echinoid and bryozoan remains and Fora- minifera) 30 510 Operculina mariannensis at 480-510. No samples 300 810 In Middle Eocene: Claiborne Group (Undifferentiated): Limestone: white, somewhat soft and chalky, fossiliferous (Foraminifera) ______________ ____________________________________ 60 Lepidocyclina sp. at 810-870. No samples 474 870 1,344 In Lower Eocene and Paleocene (Undifferentiated): Sand: medium to coarse-grained, subangular, somewhat indurated, phosphatic; some clay, dark-bluish-gray to black, laminated; considerable limestone, brownish-gray, rather dense, crystalline, coarsely glauconitic, fossiliferous (macroshells) No samples Sand: fine-grained to coarse-grained at depth, subangular, phosphatic; interbedded thin clay, light to dark-greenishgray to reddish-brown, laminated, silty, micaceous, lignitic 'Reworked (?) fossil of middle Eocene age. 48 1,392 88 1,480 90 1,570 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 383 Thickness (feet) Sand: fine to coarse-grained, subangular; some limestone, brownish-gray, rather massive, sandy, glauconitic, fossili- ferous (some macroshells) ------------------------------------------------- _ 30 Sand: fine to coarse-grained, subangular; some clay, as above; some limestone, brownish-gray, rather dense, crys- talline, sandy, fossiliferous (casts and impressions of mega- fossils) __ ----------------------------------------------------------- ---- 180 Robulus cf. R. midwayensis, Nodosaria a/finis, Eponides lotus?, Valvulineria scrobiculata at 1750-1780. Sand and clay: as above but with more sand, glauconite common 30 No samples 180 Depth (feet) 1,600 1,780 1,810 1,990 In Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Sand: fine to coarse-grained, subangular, glauconitic; some marl, dark-bluish-gray, chalky, micaceous, pyritiferous, fos- siliferous (some Foraminifera) ____ 90 Globotruncana sp., Cibicides harperi, Anomalina pseudopapillosa at 1990-2020. No samples 100 Sand and clay: as above 150 Sand: fine to coarse-grained, subangular; interbedded clay, dark-brownish-gray, laminated, silty, very micaceous, lig- nitic 570 2,080 2,180 2,330 2,900 In Tuscaloosa Formation: Sand: coarse-grained, subangular, arkosic, pink-colored grains of quartz; interbedded clay, greenish-gray, laminated, mi- caceous, carbonaceous ________________ 520 Clay: brick-red, sandy, micaceous, greasy; interbedded sand, fine to coarse-grained, subangular, arkosic 80 Sand: medium to coarse-grained, subangular, arkosic; interbedded clay, brick-red, micaceous, sandy ______________________________ 90 3,420 3,500 3,590 Lower Cretaceous(?) (Undifferentiated): Sand: coarse-grained, subangular, arkosic, grains of pink quartz; interbedded clay, dark-green with tan streaks to brick-red, greasy, micaceous, sandy; indurated sand, darkred, fine-grained, sideritic . ------------------------------- ___________________ 410 4,000 384 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: No samples ~~- ~~ -~~~~~~~~-~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ -~~~~~~~~~~~~~~~~~~~~ In Miocene (undifferentiated) ~~~~~~ Oligocene (undifferentiated) ~~~~~~~~~ ~ In upper Eocene (Ocala limestone) No samples ~ ~~~~ -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~--~ ~ In middle Eocene (Claiborne group, undifferentiated) No samples ~~~~~~~~~~~~~~ In lower Eocene and Paleocene (undifferentiated) No samples In Upper Cretaceous (post-Tuscaloosa, undifferentiated) In Upper Cretaceous (Tuscaloosa formation) Lower Cretaceous ( ?) (undifferentiated) Thickness Depth (feet) (feet) 30 3U 195 225 90 315 195 510 300 810 60 870 474 1,344 466 1,810 180 1,990 910 2,900 690 3,590 410 4,000 Limestone Potential Water-Bearing Zones: 645 870 Remarks: Top of Upper Cretaceous, as based on electric log, probably at approximate depth of 1870. Location: In McRae Owner: City of McRae Driller: M. M. Gray TELFAIR COUNTY Well No.: GGS 507 Elev.: 250 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Sand: fine to coarse-grained, somewhat argillaceous, light- gray to red (mottled), limonitic, arkosic ~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~- 20 20 Clay: pale-green, sandy; some sand, as above ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 20 40 Sand: fine to medium-grained, arkosic, finely disseminated phosphatic nodules ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ ~~~~~~~~~~~~~~~~~ 20 60 Sand: as above; interbedded clay, pale-green, sandy; thin limestones, white, sandy, sparsely but finely phosphatic ~~~~~~~~ 90 150 Limestone: white, dense (much calcitized), sandy, phosphatic, fossiliferous (macroshells and some Foraminifera) ~-~~~~~~~~~~~~~~~~ 20 170 Elphidium sp., Sorites sp. at 170-175. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 385 Oligocene (Undifferentiated): Thickness (feet) Limestone: light-gray to white at depth, nodular, highly cal- citized, crystalline, sandy, fossiliferous (some echinoid and bryozoan remains and Foraminifera) _____ _ 60 Rotalia mexicana var., Gypsina globula1 at 170-180. Lepidocyclina sp. at 210-220. Limestone: as above but much softer, massive, fossiliferous (echinoid and bryozoan remains, and Foraminifera) _____ 30 Lepidocyclina sp., Coskinolina?1 sp., Dictyoconus1 sp. at 230-240. Depth (feet) 230 260 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, much calcitized, crystalline, fossiliferous at certain levels (bryozoan remains and Foraminifera) 115 375 Opmculinoides floridensis common at 260-270. Limestone: white, dense (highly calcitized), massive, rela- tively unfossiliferous 140 515 Miocene (undifferentiated) Oligocene (undifferentiated) Upper Eocene (Ocala limestone) Summary: Limestone Potential Water-Bearing Zones: 170 170 90 260 255 515 305 515 TERRELL COUNTY Location: Approximately 300 ft. south of Central of Well No.: GGS 213 Georgia R.R., east side of main street in Dawson Elev.: 347 Owner: No. 3 City of Dawson Driller: Layne-Atlantic Olmpany Drilled: December 1950 Thkkness Depth (feet) (feet) ----------------------- Residuum: Sand: fine to coarse-grained, angular; clay, yellow to olive- green to red (mottled), sandy, limonitic; residual lime- stone, yellow, iron-stained, leached, cherty, fossiliferous (bryozoan remains, occasional Ostracods and Foraminifera) __ 20 20 Rotalia byramensis var., Quinqueloculina sp. at 0-15. 'Reworked (?) fossil of middle Eocene age. 386 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: fine to coarse-grained; fragments of residual lime- stone, as above __ 42 Depth (feet) 62 Middle Eocene: Claiborne Group: Lisbon Formation: Sand: fine to coarse-grained, some indurated, fossiliferous at depth (macroshells) ; interbedded marl, yellowish-green, somewhat indurated, sandy, micaceous, fossiliferous (some Foraminifera) 53 115 Cibicides westi at 62-77. Asterigerina lisbonensis at 77-92. Abundant macroshells at 92-107. Tallahatta Formation: Sand: fine to coarse-grained, sparsely phosphatic Cibicides tallahattensis at 128-143. 59 174 Sand: fine to coarse-grained, fossiliferous (abundant macro- shells); some clay, gray, fissile, micaceous, carbonaceous, mottled and bauxitic at depth_ 33 207 Lower Eocene: Wilcox Group (Undifferentiated): Limestone: gray, dense, crystalline, sandy, coarsely glauco- nitic, fossiliferous (macroshells) ________ ___ _ 4 211 Clay: dark-gray, silty, carbonaceous, micaceous, glauconitic, fossiliferous (Foraminifera at certain levels) 64 275 Cibicides howelli, Anomalina urnbonifera at 221-236. Sand: fine to coarse-grained, subangular, abundantly glauco- nitic __ _ 21 296 Paleocene: Midway Group: Clayton Formatio~: Sand: fine to coarse-grained, subangular, grains of pale-green quartz; some clay (or fuller's earth), light-gray, blocky, somewhat indurated, micaceous__ 35 331 Clay (or fuller's earth); some sand, as above 10 341 Limestone: light-gray, dense (much calcitized), sandy, coarse- ly glauconitic, fossiliferous (macroshells, bryozoan remains, Ostracods, and Foraminifera); interbedded clay, black, fis- sile, carbonaceous, finely micaceous, pyritiferous, fossili- ferous (Foraminifera) _--------------------------------- 15 356 Robulus cf. R. degolyeri, Cibicides praecursorius, Cibicides howelli at 341-356. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 387 Limestone: as above, very sandy at depth ______ _ Thickness (feet) 129 Depth (feet) 485 Discorbis midwayensis, Robulus midwayensis, Globulina gibba var., Eponides lotus, Cibicides praecursorius at 356371. Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Limestone and sand: as above; marl, bluish-gray, silty, mica- ceous, pyritiferous, fossiliferous (macrofossils, Ostracods, and Foraminifera) ______________ _ 9 A nomalina pseudopapillosa at 485-494. Indurated sand: fine-grained, glauconitic, micaceous, fossili- ferous (macroshells, Ostracods, and Foraminifera); marl, as above ______ ____________________ ---------------- _______________________ _ 45 Marl: bluish-gray, silty, micaceous, pyritiferous, fossiliferous (macroshells and microfossils) 489 Planulina taylorensis at 936-952. 494 539 1,028 Summary: Residuum _ ____________ ___ _____________ ______ ______________ 62 Middle Eocene (Claiborne group, undifferentiated) ---------------- 145 Lower Eocene (Wilcox group, undifferentiated) 89 Paleocene (Clayton formation) ------------------------------ 189 Upper Cretaceous (post-Tuscaloosa, undifferentiated) 543 Potential Water-Bearing Zones: Sand: fine to coarse-grained ----------------------- --------------------------- 115 Sand: fine to coarse-grained ------------------------------------------------------------------ 29 Limestone ------------------------------------------------------------------- 129 62 207 296 485 1,028 207 310 485 .388 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 1.8 mi. north of Salem A.M.E. Church, 3.8 mi. south of Dawson-Smithville Highway 118 Owner: No. 1 A. P. Lane Driller: C. M. Eubanks TERRELL COUNTY Well No.: GGS 285 Elev.: 211 Thiel ness Depth (feet) (feet l Residuum: Sand: fine to coarse-grained, argillaceous, brick-red, limonitic . 20 20 Clay: as above, with fragments of residual limestone 20 40 Quinqueloculina sp. at 20-30. Sand: fine to coarse-grained, angular, and fragments of resi- dual limestone 40 80 Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, fossiliferous (macroshells) ; some clay, pale-green, fissile, somewhat indurated, sandy, micaceous, carbonaceous 20 100 Sand: fine to coarse-grained, angular 30 130 Summary: Residuum Middle Eocene (Claiborne group, undifferentiated) 80 80 50 130 Potential Water-Bearing Zones: Sand: fine to coarse-grained 30 130 Location: Approximately 6 mi. southwest of Dawson, south side of Highway 82 at Graves School Owner: No. 1 Graves School Driller: Layne-Atlantic Company Drilled: July 1953 TERRELL COUNTY Well No.: GGS 350 Elev.: 351 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, coarser-grained at depth; inter- bedded clay, light-gray to brick-red, very sandy, limonitic______ 56 56 Middle Eocene: Claiborne Group (Undifferentiated): Clay: olive-green to tan to red (somewhat mottled), sandy; sand, fine to coarse-grained ______________ _ 10 66 WELL LOGS OF THE COASTAL PLAIN OJ<' GEORGIA 389 Sand: fine to coarse-grained, somewhat indurated T'hickness (feet) 10 Sand: fine to coarse-grained, angular 24 Sand: fine to coarse-grained, sparsely phosphatic; inter- bedded clay, yellowish-green, fissile, sandy, micaceous 62 Depth (feet) 76 100 162 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, carbonaceous, micaceous, pyritiferous; interbedded, well separated, relatively thin beds of lime- stone, gray, dense, sandy, glauconitic, fossiliferous (macro- shells) _ ----------------------------- -------- --- 80 242 Sand: fine to coarse-grained, subangular, micaceous, abun- dantly glauconitic, more indurated with depth, fossiliferous (some macroshells) _________ _______ ___________________ 18 260 Paleocene: Midway Group: Clayton Formation: Sand: fine to coarse-grained, subangular, scattered grains of pale-green quartz; some clay, dark-gray, silty, micaceous____ 44 304 Clay (or fuller's earth): light-gray, blocky, silty, carbona- ceous, micaceous 10 314 Limestone: light-gray, dense (much calcitized), somewhat saccharoidal, sandy, fossiliferous (casts and molds of mega- fossils) _ __ ----------------- -- ----------------------------------- 19 333 Summary: Residuum ___________________ Middle Eocene (Claiborne group, undifferentiated) Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) ________________ _ 56 56 106 162 98 260 73 333 Potential Water-Bearing Zones: Sand: fine to coarse-grained Sand: fine to coarse-grained Limestone ____________________ _ 60 160 26 304 19 333 Samples of poor quality. Remarks: 390 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: In Dawson Owner: No. 1 Dawson Cotton Mill Driller: Layne-Atlantic Company Drilled: June 1953 TERRELL COUNTY Well No.: GGS 352 Elev.: 345 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, angular; interbedded clay, mot- tled, sandy, limonitic; residual limestone, yellow, iron- stained, fossiliferous (Foraminifera) _______ _ 82 82 Rotalia byramensis var., Quinqueloculina sp. at 15-23. Spiroloculina sp. at 23-33. Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, limonitic, fossiliferous (macro- shells at depth) ; interbedded clay, yellowish-green to cream, sandy, fossiliferous (Foraminifera at certain horizons) ____ _ 108 190 Cibicides westi, Cibicides cf. C. refulgens at 105-125. Abundant macroshells at 94-105. Sand: as above __ 14 204 Cibicides tallahattensis and abundant macroshells at 190201. Lower Eocene: Wilcox Group (Undifferentiated): Limestone: gray, extremely dense, crystalline, sandy, coarse- ly glauconitic, fossiliferous (macroshells); some clay, dark- gray, silty, carbonaceous, micaceous, pyritiferous __ _ 24 228 Clay: as above, glauconitic and fossiliferous at depth 51 279 Eponides dorfi, Anomalina umbonifera, Cibicides praecursorius at 217-228. Sand: fine to medium-grained, subangular, abundantly glau- conitic, fossiliferous (macroshells and fish teeth) 31 310 Paleocene: Midway Group: Clayton Formation: Sand: fine to coarse-grained, subangular, scattered grains of pale-green quartz; some clay (or fuller's earth), light-gray, silty, somewhat indurated, blocky, carbonaceous, micaceous__ 20 330 Clay (or fuller's earth) : as above _ 5 335 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 391 Thickness (feet) Limestone: light-gray, dense (much calcitized), sandy, coarse- ly glauconitic, pyritiferous, fossiliferous (macroshells, bryozoan remains, Ostracods and Foraminifera) 98 Eponides lotus, Globulina gibba var., Anomalina midwayensis, Cibicides howelli, Cibicides praecursorius at 335-367. Depth (feet) 433 Summary: Residuum _____ __________________ ______________________ Middle Eocene (Claiborne group, undifferentiated) Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) _ 82 82 122 204 106 310 123 433 Potential Water-Bearing Zones: Sand: fine to coarse-grained Sand: fine to coarse-grained Limestone 75 190 41 320 98 433 Remarks: Well cuttings of poor quality; not good enough to differentiate the Claiborne group. Location: In Sasser Owner: City of Sasser Driller: Layne-Atlantic Company TERRELL COUNTY Well No.: GGS 368 Elev.: 315 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, angular, limonitic; some clay, dark-brown, sandy, carbonaceous --------------------------------- 5 5 Clay: light-gray to red (mottled), sandy, limonitic _________ 30 35 Clay: olive-green to tan, sandy; some mottled clay, as above 8 43 Clay: as above, with fragments of residual limestone, yellow to white, much leached, fossiliferous (macroshells and bryo- zoan remains) ___ _____________ _ 21 64 Sand: fine to coarse-grained, angular _ 23 87 No samples 18 105 392 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 In Middle Eocene: Claiborne Group (Undifferentiated): Thickness (feet) Limestone: white, sandy, progressively sandier and more cal- citized (dense) with depth, fossiliferous (macroshells and some Foraminifera) 70 Cibicides westi at 105-115. Sand: fine to coarse-grained; some limestone, as above _ 27 Depth (feet) 175 202 Summary: Residuum ________________________________________________________ _ No samples __________________________________________________________ In middle Eocene (Claiborne group undifferentiated) 87 87 18 105 97 202 Potential Water-Bearing Zones: Limestone Sand: fine to coarse-grained _____ _ 70 175 27 202 Location: City of Bronwood Owner: No. 1 City of Bronwood Driller: Layne-Atlantic Company Drilled: November 1954 TERRELL COUNTY Well No.: GGS 406 Elev.: 375 ThicLneso Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, angular; some clay, light-gray to brick-red (mottled), sandy __ 10 10 Clay: white to brick-red (mottled), sandy, limonitic 24 34 Clay: chocolate, blocky, carbonaceous, sandy; fragments of residual limestone ___ ______ __ _ 21 55 Sand: fine to coa1se-grained, angular; some clay, as above _ 13 68 Middle Eocene: Claiborne Group (Undifferentiated): Limestone: yellow to white, dense (much calcitized), saccha- roidal, very sandy, fossiliferous (fragments and molds of macroshells, echinoid remains, and some Foraminifera) ___ 26 94 Clay: yellowish-green, fissile, somewhat carbonaceous, mica- ceous, sandy, fossiliferous (Foraminifera) 10 104 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 393 Thickuess (feet) Sand: fine to coarse-grained, angular ~~~ 30 Cibicides westi at 126. Sand: fine to coarse-grained, subangular; interbedded thin stringers (clay partings) of clay, yellowish-green, some- what sandy, micaceous, fossiliferous (rare Foraminifera) 104 Depth (feet) 134 238 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, silty, carbonaceous, micaceous, glauconitic, pyritiferous ~~~~~ ~ ~~~~.~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~ ~~ ~~~~~~~ ~~~~~~~~ 8 246 Limestone: light-gray, dense, much calcitized, sandy, coarse- ly glauconitic, fossiliferous (macroshells) ~ ~~~~~~~~~~~~~~ 8 254 Clay: dark-gray, silty, carbonaceous, micaceous, pyritiferous, glauconitic; interbedded sand, fine to medium-grained, sub- angular, glauconitic 70 324 Indurated sand (or very sandy limestone): fine to coarse- grained, subangular, coarsely glauconitic, fossiliferous (mac- roshells) ~~ ~~~~~~~~~~~~~~~ ~.~~~~~~~ ~ ~ ~ ~~~ ~~~ ~ 6 330 Paleocene: Midway Group: Clayton Formation: Clay: gray to red (mottled), silty, micaceous, bauxitic?~~ 20 350 Sand: fine to coarse-grained, subangular, scattered grains of pale-green quartz ~ ~ 16 366 Clay (or fuller's earth) : gray, silty, blocky, carbonaceous, micaceous 6 372 Limestone: light-gray, dense, sandy, pyritiferous, glauco- nitic, fossiliferous (fragments and molds of megafossils, bryozoan remains, Ostracods and Foraminifera) ; inter- bedded clay, light-gray to black, fissile, carbonaceous, fine- ly micaceous, fossiliferous (Foraminifera) ~~~ ~~~ ~~~~~~~~~~ 28 400 Cibicides howelli, Cibicides praecursorius, Siphonina wilcoxensis at 373-382. Robulus degolyeri, Discorbis midwayensis var. trinitatensis, Cibicides howelli, Cibicides praecursorius, Alabamina wilcoxensis, Valvulineria scrobiculata at 382-392. Limestone: light-gray, dense, sandy, coarsely glauconitic, fossiliferous (fragments and molds of megafossils, bryo- zoan remains, Ostracods and Foraminifera) ~ ~~~~~~~~~~~ ~ 53 453 Robulus midwayensis, Robulus degolyeri, Eponides lotus, Discorbis midwayensis, Discorbis midwayensis var. trinitatensis, Anomalina midwayensis, Globulina gibba var. at 392-412. 394 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Summary: Residuum ___ ______________________________ ____________________ Middle Eocene (Claiborne group, undifferentiated) Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) ___________ ____________ _ Thickness (feet) Depth (feet) 68 68 170 238 92 330 123 453 Potential Water-Bearing Zones: Sand: fine to coarse-grained ______________________________________________________________ _ 20 126 Sand: fine to coarse-grained ___________________ 50 190 Sand: fine to coarse-grained _____________________________________ 16 366 Limestone _________________________________________________________________ 53 453 Location: Southeastern part of city, west side of Highway 50, in Dawson Owner: No. 1 Matthew Williams Driller: Layne-Atlantic Company Drilled: 1954 TERRELL COUNTY Well No.: GGS 407 Elev.: 354 Thickness Depth (feet) (feet) Residuum: Sand: fine to coarse-grained, angular; interbedded clay, mot- tled, sandy, carbonaceous, limonitic _________________________ 23 23 Sand: as above; clay, chocolate; scattered fragments of resi- dual limestone ________________ 41 64 Middle Eocene: Claiborne Group: Lisbon Formation: Marl: yellowish-green, somewhat fissile, sandy, micaceous, fossiliferous (some poorly preserved Foraminifera) 11 75 Spiroplectammina mississippiensis var., Textularia cuyleri, Siphonina claibornensis, Cibicides westi at 64-75. Sand: fine to coarse-grained, angular; some limestone, yel- low, sandy, fossiliferous (macroshells and Foraminifera) __ 10 85 Limestone: yellow, dense (much calcitized), saccharoidal, very sandy, fossiliferous (macroshells and Foraminifera) ___ _ 20 105 Asterigerina lisbonensis at 85-105. Sand: fine to coarse-grained, angular, coarsely glauconitic, fossiliferous (macroshells) _ . __________________ 21 126 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 395 Tallahatta Formation: Thickness (feet) Sand: fine to coarse-grained, angular, coarsely glauconitic, sparsely phosphatic; interbedded marl, yellowish-green, fis- sile, sandy, micaceous, fossiliferous (Foraminifera at cer- tain horizons) _ _________________ _______________________________ 74 Cibicides tallahattensis at 126-146. Cibicides tallahattensis, Valvulineria danvillensis var. gyroidinoides, Cibicides blanpiedi at 167-200. Depth (feet) 200 Lower Eocene: Wilcox Group (Undifferentiated): Limestone: gray, extremely dense and crystalline, sandy, coarsely glauconitic, fossiliferous (some macroshells); some clay, dark-gray, silty, carbonaceous, micaceous, pyritifer- ous, glauconitic ___________________ __________________ 28 228 Clay: dark-gray, silty, carbonaceous, micaceous, glauconitic, pyritiferous, fossiliferous (some Foraminifera at certain levels) _ _______________ ---------------------- __ ----- ----- 62 290 Robulus u>ilcoxensis, Eponides dorfi, Anomalina umbonifera, Valvttlineria scrobiculata, Siphonina u>ilcoxensis at 228. Paleocene: Midway Group: Clayton Formation: Sand: fine to coarse-grained, subangular, scattered grains of pale-green quartz; some clay, gray to red (mottled), silty, micaceous, carbonaceous, bauxitic? ______ _ 20 310 Sand: as above; some clay, dark-gray to black, somewhat fissile, carbonaceous, micaceous 51 361 Limestone: light-gray, dense (much calcitized), somewhat sandy, coarsely glauconitic, fossiliferous (fragments and molds of macroshells, bryozoan remains, Ostracods, and Foraminifera); interbedded marl, dark-gray, fissile, car- bonaceous, finely micaceous, pyritiferous, fossiliferous (Foraminifera) _______________________________ ____________________________ 11 372 Anomalina midu>ayensis, Robulus midu>ayensis, Globulina gibba var., Robulus alabamensis, Cibicides hou>elli at 361372. Limestone: as above 62 434 Summary: Residuum Middle Eocene (Lisbon formation) ________ Middle Eocene (Tallahatta formation) ________ Lower Eocene (Wilcox group, undifferentiated) Paleocene (Clayton formation) _ 64 64 62 126 74 200 90 290 144 434 396 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Potential Water-Bearing Zones: Sand: fine to coarse-grained __________________________________ 95 Sand: fine to coarse-grained __________________ 71 Limestone _______ ------------------------------------------- -------------- __ -------------- 62 Depth (fe<>t) 200 361 434 Location: About 2 mi. southwest of Dawson Owner: No. 1 Stephen Cocke Fish Hatchery Driller: M. M. Gray and Company Drilled: September 1956 TERRELL COUNTY Well No.: GGS 503 Elev.: 374 Thickness Depth (feet) (feet) Residuum and Middle Eocene (Undifferentiated): Sand: fine to coarse-grained, angular; some clay, light-gray to brick-red, sandy, limonitic ________________ 200 200 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray to brown, somewhat fissile, micaceous, car- bonaceous, abundantly glauconitic 100 300 Paleocene: Midway Group: Clayton Formation: Sand: fine to coarse-grained, subangular, scattered grains of pale green quartz ______________ ______________ _ 50 350 Clay (or fuller's earth) : dark-gray, blocky, silty, micaceous, carbonaceous 10 360 Limestone: light-gray to white, dense (much calcitized), sandy, coarsely glauconitic, pyritiferous, fossiliferous (macroshells, bryozoan remains, Ostracods, and Foramini- fera) _ _________________ ________________ _____________________________ _ 95 455 Gyroidina aequilateralis, Eponides lotus, Globulina gibba, Cibicides praecursorius at 355-365. No samples 25 480 In Upper Cretaceous (Undifferentiated): Marl: bluish-gray, silty, somewhat chalky, pyritiferous, mica- ceous, fossiliferous (macroshells, Ostracods, and Foramini- fera) ; interbedded sand, fine-grained, micaceous, pyriti- ferous, fossiliferous (macroshells, Ostracods, and Fora- minifera) __________________________________________________ _ 100 580 Anomalina pseudopapillosa at 480-490. Sand: fine to coarse-grained, angular, micaceous, phosphatic 17 597 .. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 397 Summary: Thickness (feet) Residuum and middle Eocene (undifferentiated) 200 Lower Eocene (Wilcox group, undifferentiated) _______ 100 Paleocene (Clayton formation) ______ ________________ --------------------------------- 155 No samples ___ --------------- ------------------------- 25 In Upper Cretaceous (undifferentiated) ______________ 117 Depth (feet) 200 300 455 480 597 Potential Water-Bearing Zones: Sand : fine to coarse-grained____ Sand: fine to coarse-grained __________________ Limestone ____ _______ 150 200 50 350 95 455 Location: 8 mi. northeast of Thomasville Owner: No. 1 U.S. Army Air Field Driller: Stevens Southern Drilling Company Drilled: September 1942 THOMAS COUNTY Well No.: GGS 19 Elev.: 225 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, somewhat argillaceous; inclusions of kao- lin (at depth), white, somewhat sandy _ _______________________ 30 30 Miocene (Undifferentiated): Clay: white to tan to olive-green, sandy, somewhat carbo- naceous; fragments of limestone at depth __ _ __________ 70 100 Clay: as above; some limestone, white, sandy 5 105 Limestone: white to light-brown (latter somewhat dolomi- tized), dense, crystalline, somewhat saccharoidal, sandy_ 50 155 Oligocene (Undifferentiated): Limestone: as above, but somewhat cherty, fossiliferous at depth 15 170 Asterigerina cf. A. subacuta at 160. Limestone: light-gray to white at depth, nodular, much cal- citized, fossiliferous (some macroshells, echinoid and bryo- zoan remains, and Foraminifera) __ 65 235 Rotalia mexicana var., Quinqueloculina sp. at 185. Dictyoconus1 sp. at 225. 'Reworked ( ? ) fossil of middle Eocene age. 398 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Upper Eocene: Jackson Group: Ocala Limestone: Thickness (feet) Dolomitic limestone: dark-brown to rather light-brown at depth, saccharoidal ___ ------------------------------------- _______________________________ 25 Limestone: cream, considerably calcitized, somewhat crystal- line, fossiliferous (Foraminifera); interbedded dolomitic limestone, as above__________________________________________________________ 40 Lepidocyclina sp. and Asterocyclina sp. common at 265. Gypsina globula at 280. Depth (feet) 260 300 Summary: Pliocene to Recent (undifferentiated) __ Miocene (undifferentiated) ------------------------------- Oligocene (undifferentiated) __________________ _ Upper Eocene (Ocala limestone) __________________________ 30 30 125 155 80 235 65 300 Potential Water-Bearing Zones: Limestone ________________________________ -------------------------------------------------------- 65 300 Location: East side of Jackson Street, few hundred yd. east of Atlantic Coast Line R.R. depot at City Water Works in Thomasville Owner: City of Thomasville Well No. 5 Driller: Layne-Atlantic Company Drilled: February 1949 THOMAS COUNTY Well No.: GGS 132 Elev.: 256 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, argillaceous, gray to tan (mottled), angular, finely disseminated phosphatic grains 35 35 Miocene (Undifferentiated): Sand: fine to medium-grained, angular; some clay, light- gray, sandy, gray to light-brown phosphatic pebbles __ 5 40 Limestone: white to light-brown, somewhat dolomitized, sac- charoidal at depth, dense, sandy, cherty, sparsely fossili- ferous at depth --------------------------------------------------------------------------- 130 170 Archaias sp. at 150-170. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 399 Oligocene (Undifferentiated): Thickness (feet) Limestone: white to cream, nodular, crystalline, much calcitized, fossiliferous (casts and impressions of megafossils and some Foraminifera) _________ ------------------------------------------------- 130 Rotalia mexicana var., Quinqueloculina sp., Dictyoconus sp. at 170-300. Depth (feet) 300 Upper Eocene: Jackson Group: Ocala Limestone: Dolomitic limestone: dark-brown to light-brown to white at depth, saccharoidal, gysiferous 205 Limestone: light-gray to white, saccharoidal, dense, crystalline, much calcitized, gypsiferous at certain horizons, fossiliferous (macroshells, echinoid remains and Foraminifera)__ 200 Lepidocyclina sp., Operculinoides sp. at 505-520. Gypsina globula at 530-545. Pseudophragmina flintensis at 570-585. Limestone: yellowish, crystalline, highly calcitized, somewhat saccharoidal, fossiliferous (Foraminifera) ______________________ 320 Camerina striatoreticulata, Amphistegina pinarensis var. at 770-790. Camerina striatoreticulata abundant at 920-945. 505 705 1,025 In Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: cream, granular, rather loosely consolidated, cherty at depth dense, crystalline, coarsely glauconitic; interbedded marl, light-gray, somewhat indurated, fissile________ 587 1,612 Tallahatta Formation: Sand: fine to coarse-grained, angular, abundantly glauco- nitic, fossiliferous (some Foraminifera) ____________________ 23 Operculinoides sp., Asterocyclina sp. at 1612-1620. Summary: Pliocene to Recent (undifferentiated) _____________________ _____ ______________ 35 Miocene (undifferentiated) ------------------------------------------------- __________________ 135 Oligocene (undifferentiated) ______________ ________________________________________ 130 Upper Eocene (Ocala limestone) ______________________ _ 725 In middle Eocene (Lisbon formation) ___________________________________ 587 Middle Eocene (Tallahatta formation) _______________________________ 23 1 Reworked ( ?) fossil of middle Eocene age. 1,635 35 170 300 1,025 1,612 1,635 400 Limestone Limestone GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Potential Water-Bearing Zones: Thickness Depth (feet) (feet) 130 300 270 770 Remarks: Because the dolomitic limestone above carries gypsum (CaS04) crystals, it yields highly mineralized water and is, therefore, not a source of good ground water. Sand at depth 1612-1635 contained salt water with chlorides approaching that of sea water, hence is not a source of fresh ground water. Location: In Thomasville Owner: City of Thomasville Driller: M. M. Gray Drilling Company Drilled: September 1954 THOMAS COUNTY Well No.: GGS 401 Elev.: 2851 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, argillaceous, mottled, limonitic 10 10 Sand: fine-grained, argillaceous, olive-green to tan; with in- clusions of kaolin, white, sandy 25 35 Miocene (Undifferentiated): Clay: white to light-gray to pale-green, sandy, phosphatic ______ _ 15 50 White to light-gray phosphatic pebbles prominent at 40-50. Limestone: white, dense, sandy, cherty; interbedded sand, fine to medium-grained, angular; beds of clay, white to light-gray to pale-green, sandy, phosphatic _____________ 50 100 Limestone: light-brown, somewhat dolomitized and saccha- roidal, dens~, crystalline, sandy, fossiliferous (casts and molds of megafossils); interbedded clay, as above _________ _ 80 180 Oligocene (Undifferentiated): Limestone: light-gray to white, dense, nodular, much calci- tized, fossiliferous (some Foraminifera at various horizons)__ 115 295 Asterigerina subacuta at 180-190. Dictvoconus 2 sp. at 280-290. 1Average elevation based on Georgia State Highway Maps. 2Reworked (?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 401 Upper Eocene: Jackson Group: Ocala Limestone: Dolomitic limestone: dark-brown, saccharoidal, massive Thickness Depth (feet) (feet) 105 400 Summary: Pliocene to Recent (undifferentiated) Miocene (undifferentiated) __ _ Oligocene (undifferentiated) Upper Eocene (Ocala limestone) ___ _ 35 35 145 180 115 295 105 400 Limestone Potential Water-Bearing Zones: 115 295 Location: Approximately 7 mi. south of Meigs Owner: No. 1 Waverly Petroleum Products Company Driller: Layne-Atlantic Company Drilled: 1955 THOMAS COUNTY Well No.: GGS 495 Elev.: 384 Thicknes.::; ffeet) Depth (feet) No samples ________________ 10 10 In Miocene (Undifferentiated): Clay: bluish-gray to purple (mottled), sandy, limonitic 5 15 Clay: yellowish-green, very sandy; some mottled clay, as above 13 28 No samples 9 87 Sand: fine to medium-grained, angular 23 60 Clay: yellowish to dark-green, somewhat indurated, tough, phosphatic at depth, sandy; interbedded thin beds of sand, fine to medium-grained, angular 107 167 Light-brown phosphatic pebbles common at 126-147. Limestone: white to gray to light-brown, dense, somewhat crystalline and saccharoidal, much calcitized, sandy 226 393 Limestone: as above but much sandier, phosphatic ____ 41 434 Sand: fine to coarse-grained, angular; clay, gray to yellowish- green, somewhat fissile, carbonaceous; limestone, as above______ 82 516 402 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene and Upper Eocene (Undifferentiated): Thickness \feet) Dolomitic limestone: light-brown, saccharoidal ------------------------------ 287 Pyrgo? sp. at 603-618. Rotalia mexicana var. at 680-700. Limestone: cream, much calcitized, granular, rather loosely consolidated and porous, fossiliferous (some "small" Fora- minifera) ___ _________ _________________ --------------------------------- 102 Cibicides ocalanus, Uvigerina dumblei at 803-823. Robulus alato-limbatus, Siphonina jacksonensis, Uvigerina dumblei, Dentalina jacksonensis at 823-844. Depth (feet) 803 905 Summary: No samples ___________________________________ In Miocene (undifferentiated) _ Oligocene and upper Eocene (undifferentiated) _ 10 10 506 516 389 905 Limestone Potential Water-Bearing Zones: 102 905 Remarks: The limestone section represented by this well is composed largely of dolomitic limestone which yields mineralized water. Hence, this area presents a problem in searching for satisfactory aquifers. There seem to be two possibilities in the solution of this problem, both requiring careful exploration however. The shallower-lying limestones of Miocene age may carry some ground water. Likewise the limestones occurring below 800 feet might deserve further development. However it is known that the mineralization of ground water in this area increases with depth. Location: About 1 mi. east of Tifton Owner: No. 1 Armour and Company Driller: Layne-Atlantic Company Drilled: June 1945 TIFT COUNTY Well No.: GGS 82 Elev.: 330 Thickness Depth (feet) (feet) No samples _________________________________ --------------------------------------------------------- 10 10 In Miocene (Undifferentiated): Clay: mottled, sandy, limonitic ______ -------------------------------------------------- 5 15 r WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 403 Thickness (feet) Clay: light-gray, sandy; interbedded sand, fine to coarse- grained, angular ________________ ________________________________________ 92 Clay: dark-green, sandy _____ 17 Limestone: white, dense, crystalline, sandy; interbedded beds of clay, dark-green, sandy ___________ 132 Sorites sp. at 215-216. Depth (feet) 107 124 256 Oligocene (Undifferentiated): Limestone: cream to white at depth, nodular, much calcitized, massive, fossiliferous (some macroshells, echinoid and bryo- zoan remains and Foraminifera) __________ ______________________ 119 375 Rotalia mexicana var., Pyrgo sp., Quinqueloculina sp. at 256-264. Operculinoides sp., Dictyoconus1 sp. at 260-276. Dictyoconus1 sp. common at 347-357. No samples ______ _ 21 396 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, crystalline, somewhat calcitized, fossilifer- ous (macroshells, echinoid and abundant bryozoan remains, and common to abundant Foraminifera)_ 105 501 Asterocyclina sp., Gypsina globula common at 396-419. Operculinoides floridensis, Heterostegina ocalana at 459. Summary: No samples ________________________ In Miocene (undifferentiated) Oligocene (undifferentiated) __ No samples ___________ In upper Eocene (Ocala limestone) _ 10 10 246 256 119 375 21 396 105 501 Potential Water-Bearing Zones: Limestone ____________ ---------------------------------------------- _______________________________________ 241 501 -'Reworked ( ? ) fossil of middle Eocene age. 404 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: At City Water Works in Tifton Owner: City of Tifton Driller: Stevens Southern Well Drilling Company TIFT COUNTY Well No.: GGS 292 Elev.: 355 Thickness Depth (feet) (feet) No samples 20 20 In Miocene (Undifferentiated): Clay: mottled, sandy, limonitic _______________ 20 40 Clay: yellowish-green, sandy; interbedded sand, fine to me- dium-grained, angular ______ --------------------------------- ______ _________ 90 130 No samples 10 140 Clay: as above; interbedded limestone, white, dense, calcitized, sandy _______ ------------------------------------------------------------------------------- 50 190 Limestone: white, dense, somewhat crystalline and saccha- roidal, sandy _________________________ ----------------------------------------------------------- 80 270 Oligocene (Undifferentiated): Limestone: yellow to white at depth, nodular, cherty, rather massive, somewhat sandy, fossiliferous (some macroshells, echinoid and bryozoan remains, and Foraminifera) __ 70 340 Rotalia mexicana var. at 270-280. Lepidocyclina sp., Gypsina globula1 at 300-310. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, highly calcitized and crystalline, fossili- ferous at certain levels (echinoid and bryozoan remains and some Foraminifera) ____ ___ ----------------------------------------------------- 200 540 Gypsina globula common, Operculinoides sp., Lepidocyclina sp., and bryozoan remains at 340-350. Operculinoides floridensis at 390-400. Asterocyclina nassauensis at 420-430. Limestone: light-gray, crystalline and saccharoidal, highly calcitized ---------------------------------- 45 585 No samples In Miocene (undifferentiated) Oligocene (undifferentiated) __ Upper Eocene (Ocala limestone) Summary: 1 Reworked ( ?) fossil of middle Eocene age. 20 20 250 270 70 340 245 585 Limestone WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 405 Potential Water-Bearing Zones: Thickness Depth (feet) (feet) 230 540 Location: 4.5 mi. south of R.R. in Lyons via U.S. Highway 1, 1.4 mi. west of Highway 1 via east-west dirt road on north side of said road at top of prominent hill Owner: No. 1 Gibson Driller: Tropic Oil and Gas Company Drilled: June 1945 TOOMBS COUNTY Well No.: GGS 95 Elev.: 198 Thickness Depth (feet) (feet) No samples 375 375 In Miocene (Undifferentiated): Limestone: white, somewhat recrystallized, calcitized; sand, phosphatic; some clay, pale-green, sandy 10 385 No samples __ ------------------------------------------------------------------------------------------ 15 400 Sand: fine to medium-grained, subangular, phosphatic; some clay, as above; limestone, white, sandy, phosphatic, fos- siliferous ( macroshells) --------------------------- 48 448 Oligocene (Undifferentiated): Limestone: gray, extremely dense, crystalline, cherty, sandy, sparsely phosphatic, fossiliferous (echinoid and bryozoan remains) ------------------------------------------------ 1 449 Limestone: reddish-brown, rather soft and chalky, fossilifer- ous (echinoid and bryozoan remains and Foraminifera) 37 486 Rotalia mexicana var., Quinquelomilina sp. at 449-456. No samples_ 20 506 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: reddish-brown, soft and somewhat chalky, very fossiliferous at certain levels (echinoid and bryozoan re- mains and "larger" Foraminifera) ___ _____________ _ 128 634 Camerina striatoreticulata common to abundant, Lepidocyclina sp. at 512-520. 406 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Limestone: cream, soft, fossiliferous ("larger Foraminifera" and bryozoan remains) 126 Lepidocyclina sp. common at 634-662. Operculina mariannensis at 740-750. Depth (feet) 760 Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: light-gray, calcitized and granular, somewhat loosely consolidated, glauconitic at depth, fossiliferous at certain levels (megafossils, echinoid and bryozoan remains, and some Foraminifera) ; interbedded dolomitic limestone, gray, saccharoidal, glauconitic at depth__ ________________________ 330 Asterigerina sp., Nonion advena, Nonion inexcavatus, Discorbis assulata, Gyroidina soldanii var., Cibicides americanus var. at 760-770. Glauconite common at 1033-1088. 1,090 Tallahatta Formation: Limestone: as above; interbedded sand, fine to medium- grained, subangular, coarsely glauconitic; limestone, white, rather massive, coarsely glauconitic, fossiliferous (frag- ments, casts and molds of megafossils) ___ 90 Sand: fine to medium-grained, subangular, phosphatic, some- what indurated at certain levels ____ ____ ___ 130 1,180 1,310 In Lower Eocene(?): Wilcox Group (Undifferentiated): Clay: dark-gray, somewhat indurated and fissile, micaceous, carbonaceous, glauconitic, fossiliferous (megafossils and some Foraminifera) ; interbedded thin beds of claystone, dark-gray, dense, abundantly glauconitic, cherty; beds of sand, as above__ _ 145 1,455 Paleocene: Midway Group: Clayton Formation: Limestone: light-gray, dense, crystalline, sandy, coarsely glauconitic, fossiliferous at certain levels (macroshells with bryozoan remains) ; interbedded clay, dark-gray to black, somewhat fissile, carbonaceous, micaceous _________ . _ 90 Sand: medium-grained, angular; interbedded clay, as above 155 1,545 1,700 Upper Cretaceous(?) (Undifferentiated): Sand: fine to coarse-grained, angular; clay, dark-gray, some- what fissile, micaceous, pyritiferous__ 151 1,851 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 407 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Thickness (feet) Sand: fine to medium-grained, angular; interbedded clay, dark-gray, micaceous, pyritiferous, fossiliferous at certain horizons (Foraminifera) _____ --------------------------------------- ____________________ 149 Anomalina pseudopapillosa at 1851-1856. Planulina taylorensis at 2157-2162. Marl: dark-gray to brown at depth, silty, carbonaceous, micaceous, pyritiferous, fossiliferous at certain horizons (macroshells and Foraminifera)------------------------------------------------------------------ 358 Marl: as above; interbedded sand, fine to medium-grained, an- gular, glauconitic, phosphatic, fossiliferous at certain hori- zons (macroshells) ________ _---------------------------------------------------- 262 Sand: fine to medium-grained, angular, phosphatic, somewhat indurated, fossiliferous (macroshells) 50 Depth (feet) 2,000 2,358 2,620 2,670 Tuscaloosa Formation: Sand: fine to coarse-grained, angular, arkosic; relatively thin stringers of clay, gray to pale-green, somewhat fissile, ironstained, micaceous, sandy ________ ------------------------------- _______________ 130 Clay or shale: gray, carbonaceous, micaceous having a some- what speckled appearance; interbedded sand, fine to coarse- grained, angular, arkosic __ ______________ 130 Sand: fine to coarse-grained, angular 91 Sand: coarse-grained, angular, arkosic, rather massive; in- terbedded clay, green to red (mottled), micaceous, sideritic, sandy -------------------------------------- _____________ _ 489 2,800 2,930 3,021 3,510 Lower Cretaceous(?) (Undifferentiated): Clay: mottled, waxy, highly micaceous, sandy; interbedded sand, fine to coarse-grained, angular, arkosic . ____________ 153 Sideritic nodules common at 3552-3562. 3,663 Basement Complex (Undifferentiated): Crystalline rocks ______ _______________ _ Summary: No samples _ In Miocene (undifferentiated) _____ _ Oligocene (undifferentiated) _____ _ No samples _____________ ____________________________________________ In upper Eocene (Ocala limestone) 17 3,680 375 375 73 448 38 486 20 506 254 760 408 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Middle Eocene (Lisbon formation) __________________________________________________ 330 Middle Eocene (Tallahatta formation) ________________ ------------------------ 220 In lower Eocene ( ?) (Wilcox group, undifferentiated) __ _ 145 Paleocene (Clayton formation) _________ _ --- 245 Upper Cretaceous (?) (undifferentiated) _______________ 151 Upper Cretaceous (post-Tuscaloosa, undifferentiated) _________ ---------- 819 Upper Cretaceous (Tuscaloosa formation) 840 Lower Cretaceous ( ?) (undifferentiated) _____________________ 153 Basement complex (undifferentiated) 17 Depth (feet) 1,090 1,310 1,455 1,700 1,851 2,670 3,510 3,663 3,680 Potential Water-Bearing Zones: Limestone _______________________ _ Sand: fine to medium-grained ___________ Sand : medium-grained ___ ________________ 310 760 130 1,310 135 1,680 Location: 6 mi. west of Soperton, Land Lot 221, Ga. Military District 1386 Owner: No. 1 James Fowler Driller: Rose and Ray Drilled: 1940 TREUTLEN COUNTY Well No.: GGS 127 Elev.: 291 Thickness Depth (feet) (feet) No samples 765 765 In Middle Eocene: Claiborne Group (Undifferentiated): Limestone: light-gray to white, dense, crystalline, sandy, phosphatic (finely disseminated), coarsely glauconitic, fos- siliferous (fragments, casts and molds of megafossils, Os- tracods and Foraminifera) _ 130 895 Nonion advena, Gyroidina soldanii var., Eponides jacksonensis, Non-ion inexcavatus, Cibicides pseudoungerianus, Cibicides americanus var. at 765-815. Lepidocyclina (Polylepidina) antillea, Asterigerina sp. at 815-825. Aste?ocuclina rnon ticellensis at 835-855. Indurated sand: dark-gray, somewhat argillaceous, dense, phosphatic (finely disseminated), carbonaceous, micaceous, fossiliferous (some Foraminifera) 20 915 Cibicides blwnpiedi at 895-915. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 409 Thickness (feet) Limestone: gray, dense, crystalline, sandy, coarsely glaucon- itic; interbedded marl, light-gray, silty, micaceous, carbon- aceous, glauconitic (finely disseminated), fossiliferous (some Foraminifera) __ _ 30 Reussel/a subrotundata, Cibicides mau1icensis at 915-935. Indurated sand: as above, but fossiliferous (a coquina) __ 20 No samples 20 Limestone: gray, dense, coarsely glauconitic, sandy, fossilifer- ous (abundant macroshells and some Foraminifera). 20 Sand: fine to coarse-grained, phosphatic_ 80 Depth (feet) 945 965 985 1,005 1,085 Lower Eocene: Wilcox Group (Undifferentiated): Clay: dark-gray, somewhat fissile, silty, lignitic, micaceous; interbedded sand, fine to medium grained _ 170 1,255 Siphonina prima at 1165-1185. Paleocene: Midway Group: Clayton Formation: Limestone: gray to white at depth, dense, crystalline, sandy, coarsely glauconitic, fossiliferous (casts and molds of mega- fossils, bryozoan remains, and Foraminifera) _____________ _ 40 1,295 Robulus sp., Discorbis midwayensis, Discorbis midwayensis var. trinitatensis, Sigmomorphina semitecta var., Valvulineria scrobiculata, Eponides lotus, Siphonina wilcoxensis, Cibicides howelli at 1275-1295. Sand: fine to coarse-grained 20 1,315 In Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Sand: as above; some clay, chocolate-brown to dark-gray, mi- caceous, somewhat fissile__ __________________ _ 20 Sand: fine to coarse-grained, angular, arkosic, grains of "rose quartz" 80 No samples 140 Clay: brown, carbonaceous, very micaceous, pyritiferous, fos- siliferous (macroshells and Foraminifera at certain levels) ; interbedded sand, fine to coarse-grained, angular__ 320 Planulina taylorensis at 1695-1715. Kyphopyxa christneri at 1795-1815. Sand: fine to coarse-grained, angular, highly micaceous, abun- dantly phosphatic; interbedded shale, dark-gray, fissile, mi- caceous (finely disseminated, "speckled") 130 No samples 30 1,335 1,415 1,555 1,875 2,005 2,035 410 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 In Tuscaloosa Formation: Thickness (feet) Sand: fine to coarse-grained, angular; interbedded clay, yellowish-green, fissile, micaceous, somewhat carbonaceous_______ 90 Depth (feet) 2,125 Summary: No samples __ ------------------------------------------------- 765 In middle Eocene (Claiborne group, undifferentiated)______________________ 320 Lower Eocene (Wilcox group, undifferentiated)__________ 170 Paleocene (Clayton formation)___________________________________________ 60 In Upper Cretaceous (post-Tuscaloosa, undifferentiated)_____ 690 No samples ___________________ ____________________ ____________________ 30 In Upper Cretaceous (Tuscaloosa formation)_ 90 765 1,085 1,255 1,315 2,005 2,035 2,125 Potential Water-Bearing Zones: Sand: fine to coarse-grained___ Sand: fine to coarse-grained___ 80 1,085 80 1,415 Remarks: The Ocala limestone lies somewhere in the interval 0-765 and constitutes an additional source of ground water besides being at a much shallower depth below land surface datum than the aquifers noted above. Location: 0.7 mi. northwest of Coverdale Owner: No. 1 C. W. Dearso Driller: Winter Hardware Company Drilled: October 1942 TURNER COUNTY Well No.: GGS 2 Elev.: 413 Thickness Depth (feet) (feet) No samples ___ 10 10 In Miocene (Undifferentiated): Clay: gray, sandy; interbedded sand, fine to coarse-grained, angular _____ _________________ _____________________________ 70 80 Clay: yellowish-green, sandy; interbedded sand, as above ___ 155 235 Oligocene (Undifferentiated): Limestone: white, dense, nodular, calcitized, fossiliferous (bryozoan remains and some Foraminifera)__ ___________________ 25 260 Rotalia mexicana var. at 240-260. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 411 Summary: No sampies -------------------------------------- ---------------------------------------------------In Miocene (undifferentiated) ____ Oligocene (undifferentiated) ____ _ Thickness (feet) 10 225 25 Depth (feet) 10 235 260 Potential Water-Bearing Zones: Limestone __________________ ------------------------------- ---------------------------------- 25 260 Location: 1,6 mi. northwest of Coverdale on State Highway 112 Owner: No.1 J. W. Hallman Driller: Winter Hardware Company Drilled: October 1942 TURNER COUNTY Well No.: GGS 13 Elev.: 399 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic_ 100 100 Clay: yellowish-green, sandy; interbedded sand, fine to coarse- grained, angular, arkosic____ 80 180 Limestone: white, dense, sandy_ 20 200 In Oligocene (Unrlifferentiated): Limestone: white, dense, nodular, recrystallized, fossiliferous (some Foraminifera) _____________ _ 40 240 Rotalia mexicana var., Asterigerina subacuta at 200-220. Summary: Miocene (undifferentiated) _______ In Oligocene (undifferentiated) ___ 200 200 40 240 Limestone ________ Potential Water-Bearing Zones: 40 240 412 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 4 mi. southwest of Ashburn on Highway 112, Land Lot 50, 2nd Land District Owner: No.1 W. B. Hobby Driller: W. B. Graham Drilled: 1947 TURNER COUNTY Well No.: GGS 164 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic__ 30 30 Clay: light-gray, sandy; interbedded sand, fine to coarse- grained, angular _ _________________________ -------------------------------- 60 90 Clay: dark-green, sandy, somewhat indurated at certain levels__ 90 180 Limestone: white, dense, sandy__ 20 200 Oligocene (Undifferentiated): Limestone: white, nodular, recrystallized, much calcitized, fos- siliferous (some Foraminifera) __ _ 120 320 Rotalia mexicana var., Pyrgo sp., Gypsina globulal, Dictyoconus1 sp. at 200-210. Asterigerina subacuta at 250-260. Lepidocyclina sp. at 300-310. Summary: Miocene (undifferentiated) ______ _______________ _ 0 ligocene (undifferentiated) ----------------------------------- ____ 200 200 120 320 Limestone Potential Water-Bearing Zones: 120 320 Location: 3.75 mi. (map distance) northwest of Ashburn, near Highway 7 on county side road Owner: No.1 V. H. Burke Driller: H. B. Truluck TURNER COUNTY Well No.: GGS 210 Elev.: 386 Thickness Depth (feet) (feet) No samples_ 35 35 In Miocene (Undifferentiated): Clay: light-gray, sandy; interbedded sand, fine to coarse- grained, angular, arkosic_ _______________ ______________ _ 70 105 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 413 Thickness (feet) Limestone: cream, sandy, cherty at certain levels; some clay, yellowish-green, sandy ___ ____________________________ _ 30 Clay: yellowish-green, sandy, somewhat indurated_____ 10 Depth (feet) 135 145 In Oligocene (Undifferentiated): Limestone: white, dense, crystalline, calcitized, fossiliferous (macroshells, bryozoan remains, and some Foraminifera)_ 40 185 Asterigerina sp. at 145-155. Rotalia rnexicana var. at 155-165. No samples __ 40 225 Limestone: as above, but more calcitized; some sand, fine to medium-grained, angular ___ ---------------------------------------------------- ? 225 Summary: No samples ___ ________ _ In Miocene (undifferentiated) __ In Oligocene (undifferentiated) ___ 35 35 110 145 80 225 Limestone Potential Water-Bearing Zones: 40 185 Location: In Ashburn Owner: No. 1 Manhattan Shirt Company Driller: M. M. Gray Drilling Company Drilled: 1958 TURNER COUNTY Well No.: GGS 557 Elev.: 430 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: pale-green to tan to purple to red (mottled), sandy, limonitic; interbedded sand, fine to coarse-grained, angular, arkosic _________________ ____________________ 190 190 Clay: pale-green, blocky, sandy; interbedded sand, as above; limestone, white, sandy_ _______ ------------------------------ _________________ 90 280 414 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness (feet) Limestone: white to cream, nodular, massive, much calcitized, fossiliferous (some megafossils, bryozoan remains, and Foraminifera) _______________________ ------------------------------------ _ 105 Asterigerina subacuta, Gypsina globula1 at 280-290. Rotalia mexicana var. at 290-300. Lepidocyclina sp. at 300-310. Depth (feet) 385 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream to light-brown, somewhat dolomitized at certain levels, much ealcitized, granular, fossiliferous (com- mon to abundant bryozoan remains and Foraminifera) 140 525 Lepidocyclina chaperi at 385-395. Robulus sp., Eponides jacksonensis, Gypsina globula, Lepidocyclina chaperi at 395-405. Sand: fine to coarse-grained, angular; limestone, white to cream-colored, somewhat granular and calcitized, fossilifer- ous ("larger Foraminifera")__ __ ___________ _______________ 30 555 Asterocyclina sp. at 525-535. Limestone: cream, rather soft and porous, granular, much cal- citized, fossiliferous ("larger Foraminifera")_ ______________ 110 665 Operculina cf. 0. mariannensis, Camerina striatoreticulata at 555-565. Amphistegina pinarensis var. at 575-585. Asterocyclina sp. common at 635-645. No samples_ 5 670 In Middle Eocene: Claiborne Group: Lisbon Formation: Marl: light-gray, silty, micaceous, fossiliferous (some Fora- minifera at certain levels); interbedded limestone, dark- green, massive, dense, crystalline, coarsely glauconitic at depth, pyritiferous, fossiliferous (megafossils and some bryozoan remains) _--------------------------------- _________________________ 80 750 Operculinoides sp., Cibicides pseudoungerianus var. lisbon.ensis at 670-680. Sand: fine to coarse-grained, angular, phosphatic; some marl and limestone, as above________________________________ ------------------------------------ 20 770 'Reworked(?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 415 Summary: Miocene (undifferentiated) Oligocene (undifferentiated) ______ Upper Eocene (Ocala limestone) ______ No samples ____ _______________________________ _ In middle Eocene (Lisbon formation) ______ Thickness Depth (feet) (feet) 280 280 105 385 280 665 5 670 100 770 Potential Water-Bearing Zones: Limestone Limestone Sand: fine to coarse-grained __ _ 245 525 110 665 20 770 Location: In Ashburn Owner: City of Ashburn Driller: Layne-Atlantic Company Drilled: July 1957 TURNER COUNTY Well No.: GGS 565 Elev.: 430 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, blocky, sandy, limonitic; interbedded sand, fine to coarse-grained, subangular, arkosic_____ ___________________ 87 87 Clay: as above, but somewhat indurated, tough; sand, as above__ 125 212 Oligocene (Undifferentiated): Limestone: white, somewhat nodular, massive, recrystallized and saccharoidal, fossiliferous (some macroshells, echinoid and bryozoan remains, and Foraminifera) 63 275 Asterigerina subacuta, Quinqueloculina sp., Dictyoconus1 sp. at 212-230. Rotalia mexicana var. common at 230-232. Gypsina globula1 at 260-270. Limestone: cream, massive, calcitized, somewhat nodular, cherty, relatively unfossiliferous __________________ _ 115 390 'Reworked ( ?) fossil of middle Eocene age. 416 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 In Upper Eocene: Jackson Group: Ocala Limstone: Thickness (feet) Limestone: cream, calcitized, granular (in texture), fossil- iferous at certain levels (bryozoan remains and Foramini- fera) 260 Lepidocyclina chaperi at 397-419. Lepidocyclina ocalana at 541-551. Amphistegina pinarensis var. at 582-595. Depth (feet) 650 Summary: Miocene (undifferentiated) Oligocene (undifferentiated) In upper Eocene (Ocala limestone) __ 212 212 178 390 260 650 Limestone Potential Water-Bearing Zones: 438 650 Location: Approximately 3.5 mi. east of Huber, 2.5 mi. east of U.S. Highway 129, and 1.5 mi. south of a crossroads at machine shop Owner: J. M. Huber Company Driller: Southeastern Drilling Company Drilled: August 1953 TWIGGS COUNTY Well No.: GGS 354 Elev.: 507 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: red, very sandy, limonitic_____ 20 20 Clay: yellowish-green, carbonaceous, blocky__ 30 50 Limestone: white, somewhat leached, sandy at depth, fossil- iferous (macroshells, echinoid and abundant bryozoan re- mains) ______________ ---------------------------------------------------------------- 40 90 Sand: fine to coarse-grained, angular; inclusions of kaolin, white, micaceous _________ . ____________ _ 20 110 Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, angular_____ 30 140 Kaolin: white to dark-gray, micaceous, carbonaceous, sandy______ 20 160 Sand : fine to coarse-grained, angular__ 25 185 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 417 Summary: Upper Eocene (Barnwell formation) ____________________ Upper Cretaceous (Tuscaloosa formation) _________ Thickness Depth (feet) (feet) 110 110 75 185 Potential Water-Bearing Zones: None because static water level is below total depth of well. Location: Few hundred yards south of Well 354 Owner: J. M. Huber Company Driller: Layne-Atlantic Company Drilled: October 1953 TWIGGS COUNTY Well No.: GGS 360 Elev.: 470 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: olive-green to red (mottled), very sandy, limonitic Clay: yellowish-green, sandy; fragments of limestone_________ Limestone: white, very sandy Sand: fine to coarse-grained, somewhat arkosic 15 15 17 32 14 46 60 106 Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, angular; interbedded clay (or kaolin) __________________ ______ ____ _________ __ __ ______________ __________________ _____ 230 336 Kaolin: white, micaceous _ 6 342 Summary: Upper Eocene (Barnwell formation) __ Upper Cretaceous (Tuscaloosa formation)_ 106 106 236 342 Potential Water-Bearing Zones: Sand: fine to coarse-grained________ 60 260 Sand: fine to coarse-grained_________________ 31 305 Sand: fine to coarse-grained _______________ -------------------------------------------- 18 336 Well samples of poor quality. Remarks: 418 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Approximately 1 mi. south of Dry Branch, 1.5 mi. east of U.S. Highway 80 Owner: Georgia Kaolin Company Driller: Layne-Atlantic Company Drilled: March 1955 TWIGGS COUNTY Well No.: GGS 415 Elev.: 430 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Sand: fine to medium-grained, gray, argillaceous _ Sand: fine to coarse-grained, angular, somewhat arkosic 24 24 20 44 Upper Cretaceous: Tuscaloosa Formation: Kaolin: micaceous, somewhat sandy______ _ Sand: fine to coarse-grained, angular, arkosic _ Kaolin: mottled, micaceous, somewhat sandy__ Sand: coarse-grained, angular; kaolin, white__ _____________ Clay: brick-red, micaceous, sandy_ __________ __ ___ Sand: fine to coarse-grained, angular, arkosic. 21 65 117 182 12 194 14 208 23 231 141 372 Summary: Upper Eocene (Barnwell formation)_ Upper Cretaceous (Tuscaloosa formation) 44 44 328 372 Potential Water-Bearing Zones: Sand: fine to coarse-grained______________________ ----------------------------------------- 100 331 Well samples of poor quality. Remarks: TWIGGS COUNTY Location: Northeastern part of county, 1.75 mi. southeast Well No.: GGS 416 of Liberty Church which is 0.75 mi. east of Myerick's Pond Elev.: 380 Owner: No. 23 Georgia Kaolin Co. Driller: Layne-Atlantic Company Drilled: March 1955 Thickness Depth -------------------------------------------------If-eet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: mottled, very sandy, limonitic______________________________________ 6 6 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 419 Thickness (feet) Marl: light-gray, silty, glauconitic__________________________________________________ 17 Depth (feet) 23 Sand: fine to coarse-grained, angular, phosphatic; interbedded marl, as above__ ______________ _____________________ _______________________ 45 68 Sand: fine to coarse-grained, angular _ 22 90 Upper Cretaceous: Tuscaloosa Formation: Clay: light-gray, sandy, micaceous_____________ 10 100 Sand: fine to coarse-grained, angular, somewhat arkosic; interbedded clay, as above_____________________________________________________________ 85 185 Sand: coarse-grained, angular, arkosic; interbedded thin beds of kaolin -------------------------------------------------------------------------------- 248 433 Summary: Upper Eocene (Barnwell formation) Upper Cretaceous (Tuscaloosa formation) ________ 90 90 343 433 Potential Water-Bearing Zones: Sand: fine to coarse-grained__ --------- 228 413 Well samples of poor quality. Remarks: Location: At Airport, City of Waycross Owner: No.1 Waycross Airport Driller: Layne-Atlantic Company WARE COUNTY Well No.: GGS 36 Elev.: 142 Pliocene to Recent (Undifferentiated): Sand: fine to coarse-grained, finely disseminated phosphatic grains __ 15 15 Clay: pale-green to red (mottled), sandy_________________________ 10 25 Sand: medium to coarse-grained, arkosic__________________________________________ 17 42 Sand: as above; clay, tan to red (mottled), sandy; fragments of limestone, light-gray, dense, sandy_ ---------------------- ___________________ 20 62 Miocene (Undifferentiated): Clay: dark-green, sandy; interbedded sand, fine to coarse- grained, phosphatic __ __ _ _ _________ ----------------------------------------- 265 327 420 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Sand: fine to coarse-grained, phosphatic_________________________________________ 50 Sand: as above; interbedded limestone, white, sandy; clay, dark-green, sandy, phosphatic________________________________________________________ 63 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic ----------------------------------------- -------------------------------------------------- 50 Depth (feet) 377 440 490 Oligocene (Undifferentiated): Limestone: light-gray, dense (much calcitized), nodular, fos- siliferous (some Foraminifera) ------------------------------- 8 498 Dictyoconus1 sp. at 490-498. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, much calcitized, saccharoidal, fossiliferous (Foraminifera) -------------------------------------- 123 621 Gypsina globula, Operculinoides floridensis at 550-560. Asterocyclina nassauensis at 570-580. Summary: Pliocene to Recent (undifferentiated) __ Miocene (undifferentiated) _____ _ Oligocene (undifferentiated) ____ _ Upper Eocene (Ocala limestone) ______ _ 62 62 428 490 8 498 123 621 Potential Water-Bearing Zones: Sand: fine to coarse-grained__ Limestone _ 50 377 131 621 Location: In City of Waycross Owner: No.3 City of Waycross Driller: Layne-Atlantic Company WARE COUNTY Well No.: GGS 366 Elev.: 140 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, finely disseminated phosphatic grains and scattered kaolin inclusions______________________________________ 10 10 Sand: fine to coarse-grained, arkosic, rounded; clay, light- gray to red (mottled), sandy______________ _______________ 15 25 Clay: pale-green to purple (mottled), sandy____ ----------------------------- 15 40 Sand: fine to coarse-grained, arkosic, rounded______________________________ 25 65 1Reworke<1( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 421 Miocene (Undifferentiated): Thickness Depth (feet) (feet) Clay: dark-green, sandy; interbedded sand, fine to coarse- grained, phosphatic _________ 135 200 Sand: fine to coarse-grained, phosphatic__ _ 50 250 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; interbedded limestone, white, sandy; sand, fine to coarse-grained, phosphatic 90 340 Clay: light-gray, calcareous __ 20 360 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; interbedded limestone, white, sandy; sand, fine to coarse-grained, phosphatic _______ _________________ _______________ 70 430 Limestone: white, dense (much calcitized), sandy, phosphatic, fossiliferous (fragments and molds of megafossils)_ 60 490 Oligocene (Undifferentiated): Limestone: light-gray, dense (much calcitized), nodular, fos- siliferous (some Foraminifera) __ 20 510 Dictyoconus1 sp., Quinqueloculina sp. at 490-500. Upper &cene: Jackson Group: Ocala Limestone: Limestone: white, dense (much calcitized), fossiliferous (For- aminifera) ----------------------------- _____________________________ _ 265 775 Gypsina globula at 510-520. Asterocyclina nassauensis, Operculinoides sp. at 550-560. Amphistegina pinarensis var. at 680-690. Summary: Pliocene to Recent (undifferentiated) __ 65 65 Miocene (undifferentiated) ______ 425 490 Oligocene (undifferentiated) _______ ---------------- 20 510 Upper Eocene (Ocala limestone) _ __________________________ 265 775 Potential Water-Bearing Zones: Sand: fine to coarse-grained ________ Limestone 50 250 285 775 'Reworked(?) fossil of middle Eocene age. 422 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 1 block northeast of Post Office at Coca Cola Plant in Waycr:oss Owner: No. 1 Coca Cola Company Driller: M. M. Gray Drilling Company Drilled: January 1957 WARE COUNTY Well No.: GGS 527 Elev.: 1401 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, argillaceous, finely dissemi- nated phosphatic grains and kaolin inclusions __________________ 15 15 Miocene (Undifferentiated): Clay: mottled, sandy, some sand as above __ 25 40 Sand: fine to coarse-grained, angular, arkosic __ 60 100 Sand: coarse-grained, arkosic; clay, dark-green, sandy__ 260 360 Black phosphatic pebbles abundant at 310-320. Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic; interbedded limestone, white, dense (much calci- tized), sandy, phosphatic_ _____________ _ 120 480 Oligocene (Undifferentiated): Limestone: cream, very dense (highly calcitized), fossilifer- ous (Ostracods and Foraminifera)__ __________________ _ 20 500 Dictyoconus 2 sp., Quinqueloculina sp. at 480-490. No samples ____________________________________________ 20 520 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray, very dense (highly calcitized), fossil- iferous (abundant Foraminifera)_ ____________ _ 170 690 Gypsina globula, Pseudophragmina flintensis, Asterocyclina nassauensis at 520-530. Limestone: cream, much calcitized, massive 18 708 Summary: Pliocene to Recent (undifferentiated) _____ _ Miocene (undifferentiated) ______________________ Oligocene (undifferentiated) No samples_ In upper Eocene (Ocala limestone) _______________________ 1Average elevation based on Georgia State Highway Maps. 'Reworked ( ?) fossil of middle Eocene age. 15 15 465 480 20 500 20 520 188 708 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 423 Potential Water-Bearing Zones: Limestone ____________ ------------------------------ --------------------------------------- Thickness Depth (feet) (feet) 228 708 Samples of poor quality. Remarks: Location: In Waresboro, northwestern part of Waycross Owner: No. 1 Waresboro Elementary School Driller: Turner Well Drilling Company Drilled: April 1957 WARE COUNTY Well No.: GGS 538 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: medium to coarse-grained, subangular____ Clay: pale-greenish-gray, sandy, micaceous _ 25 25 60 85 Miocene (Undifferentiated): Clay: dark-olive-green to brownish-gray, sandy_ No samples ________________ 62 147 10 157 Sand: fine to medium-grained, subangular__ 10 167 Sand: coarse-grained, subrounded, phosphatic, arkosic______ 10 177 Limestone: light-gray to light-brown, much calcitized, saccha- roidal, sandy, phosphatic, cherty___________ __________________ 31 208 Brownish-gray chert (or siltstone~) prominent at 198-208. Clay: greenish-gray, blocky, sandy, phosphatic; interbedded sand, fine to medium-grained, subangular________ 62 270 Limestone: cream to light-brown, saccharoidal, sandy, phos- phatic______________________________ __ ------------------------------- 30 300 Sand: medium to coarse-grained, subangular, phosphatic 11 311 Limestone: cream to light-gray, saccharoidal, sandy, phos- phatic, fossiliferous (megafossils, echinoid and bryozoan remains, and some Foraminifera at depth)_____ _______ _________ 92 403 First observed megafossils at 311-321. Elphidium sagrum, Elphidium poeyanum, Valvulineria sp., Cibicides concentricus at 403-413. Limestone: light-brown, saccharoidal, sandy, phosphatic_ 10 413 424 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness (feet) Limestone: light-gray to cream at depth, rather massive, somewhat nodular, fossiliferous (bryozoan remains and some Foraminifera) ------------------------------------------------------------------------ 62 Quinqueloculina sp., Rotalia mexicana var. at 413-423. Dictyoconus1 sp., Quinqueloculina sp. at 423-434. Gypsina globula1 at 465-475. No samples------------------------------------ 9 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, relatively soft and porous, calcitized, granular, fossiliferous (bryozoan remains and some Fora- minifera) _______ -------------------------- 114 Operculinoides sp. at 484-495. Asterocyclina sp., Operculinoides sp. at 505-516. Depth (feet) 475 484 598 Summary: Pliocene to Recent (undifferentiated) ________ Miocene (undifferentiated) ________________________ Oligocene (undifferentiated) _______ No samples -------------------------------------------------In upper Eocene (Ocala limestone) ______ 85 85 328 413 62 475 9 484 114 598 Limestone .. Potential Water-Bearing Zones: 114 598 Location: 1.4 mi. southwest of junction of Highways 15 and 24 in Sandersville, near east side of Highway 15 near concrete reservoir Owner: City of Sandersville well no. 5 Driller: Layne-Atlantic Company Drilled: June 1944 WASHINGTON COUNTY Well No.: GGS 94 Elev.: 465 Thicknes" Depth (feet) (feet) Miocene: Hawthorn Formation: Clay: bluish-green to red (mottled), light-gray at depth, blocky, sandy, limonitic... ____________________________ 50 50 Upper Eocene: Jackson Group: Barnwell Formation: Sand: fine to medium-grained, angular, somewhat indurated. 5 55 'Reworked fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 425 Thickness (feet) Limestone1 : white, dense, somewhat saccharoidal (calcitized), sandy, much sandier at depth, cherty, coarsely but sparsely glauconitic, fossiliferous (echinoid and bryozoan remains and Ostracods) --------------------------------- ------------------------------ 62 Sand: fine to coarse-grained, subangular_ 13 Marl: light-gray, silty, blocky, fossiliferous (echinoid and bryozoan remains, macroshells, Ostracods, and Foraminifera) 23 Elphidium sp., Nonion advena, Nonion inexcavatus, Valvulineria jacksonensis at 132-134. Limestone (or coquina) : gray, dense, somewhat saccharoidal, very sandy, fossiliferous (fragments and casts and molds of megafossils) ----------------------------------------------------- __________________ _ 13 Marl: light-gray, somewhat indurated, fissile, silty, progres- sively sandier at depth, carbonaceous, fossiliferous (echinoid and bryozoan remains, Ostracods, and Foraminifera) ___ 16 Limestone (or coquina) : gray to cream, crystalline to saccha- roidal, very sandy, fossiliferous (fragments and molds of megafossils) ------------------------------------------------------------------------------------- 5 Marl: light-brown, somewhat indurated, fissile, carbonaceous, sandy -------------------------------------------------------------------------------------------------- 10 Sand: fine to coarse-grained, angular________________________________ _ 5 Marl: gray, somewhat indurated, fissile, carbonaceous, sandy____ 5 Limestone (or coquina): greenish-gray, dense, very sandy, phosphatic (finely disseminated), fossiliferous (casts and molds of megafossils and bryozoan remains)_____ ________________ 53 Depth (feet) 117 130 153 166 182 187 197 202 207 260 Upper Cretaceous: Tuscaloosa Formation: Sand: fine to coarse-grained, angular, limonitic; some clay (or kaolin), gray to red (mottled), micaceous; limestone, ''cave'' from above______________________________________________________________________________ 6 266 Kaolin: gray, blocky, micaceous, somewhat sandy__________________________ 5 271 Kaolin: white, micaceous, somewhat sandy__________________________________ 71 342 Clay: gray to dark-brown, lignitic______ ------------------------------ ______________ 20 362 Sand: fine to coarse-grained; interbedded thin stringers of clay, as above___ ---------------------------------------------------------------------------------- 81 443 'Probable SandersviJJe limestone. 426 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Clay: brick-red, micaceous, sandy________________________________________________________ 21 Sand: fine to coarse-grained; interbedded clay, gray to darkbrown to black to mottled, micaceous, somewhat sandy, lignitic ------------------------------------------------------------------------------------------------------ 163 Sand: fine to coarse-grained, very coarse-grained and gravelly at depth; interbedded clay, gray to green to red, somewhat fissile, micaceous, sandy___________________________________________________________________ 244 Depth (feet) 464 627 871 Basement Complex (Undifferentiated): Crystalline rock 1.5 872.5 Summary: Miocene (Hawthorn formation) _ Oligocene ( ?) (undifferentiated) _______________ Upper Eocene (Barnwell formation) Upper Cretaceous (Tuscaloosa formation) Basement complex (undifferentiated) _______ 50 80 130 611 1.5 50 130 260 871 872.5 Potential Water-Bearing Zones: Sand: fine to coarse-grained_________________________________________ 13 130 Sand: fine to coarse-grained______ ---------------------------------- _____________ 5 202 Sand: fine to coarse-grained________ ---------------------------------- 6 403 Sand: fine to coarse-grained________________________________________________ 10 443 Sand: fine to coarse-grained_____________________________________________________________ 76 500 Sand: fine to coarse-grained ------------------------------------ 39 571 Sand: fine to coarse-grained ------------------------------------ ________________ 12 593 Sand: fine to coarse-grained_____________________________________________________ 29 669 Sand: fine to coarse-grained __ ______________ __________________________ _ 17 714 Sand: fine to coarse-grained_______ _____________ 44 786 Sand: fine to coarse-grained __ 14 869 Location: 2.8 mi. north of Highway 24 at Davisboro and 0.7 mi. west of north-south dirt road, near storage shed Owner: Georgia Forest Service Driller: Layne-Atlantic Company Drilled: May 1948 WASHINGTON COUNTY Well No.: GGS 152 Elev.: 392 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: brick-red, very sandy, limonitic; fragments of residual limestone _____________ --------------------------------------- ------------------------------- 33 33 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 427 Thickness (feet) No samples -------------------------------------------------------------------------------------------- 17 Sand: fine to medium-grained, much coarser-grained at depth, angular; some clay, gray to cream to pink, and scattered fragments of residual limestone_____ ________________ 47 Sand: fine to coarse-grained; marl, yellowish-green, somewhat fissile, sandy, fossiliferous (macroshells, echinoid and bryo- zoan remains, Ostracods, and Foraminifera) _______________ _ 6 N onion advena, N onion inexcavatus, Valvulineria jacksonensis, Cibicides lobatulus at 97-103. Limestone: gray to yellow, dense, somewhat saccharoidal and crystalline (in texture), very sandy, fossiliferous (macro- shells, echinoid and bryozoan remains) _______ 2 Sand: fine to coarse-grained, angular; some marl, cream to yellowish-green to red (mottled), fossiliferous (macroshells and some microfossils)_________ _____________________________________ _ 48 Clay: yellowish-green, noncalcareous, fissile, somewhat ben- tonitic _ ________ _________ __ _________ ------- -------- 28 Sand: fine to coarse-grained; some clay, yellowish-green to red (mottled), sandy _---------------------------------- --------------------------------- 24 Limestone: gray, dense, saccharoidal, very sandy, sparsely phosphatic, fossiliferous (fragments, casts and molds of megafossils) - ___________________ _ 14 Depth (feet) 50 97 103 105 153 181 205 219 Upper Cretaceous: Tuscaloosa Formation: Kaolin: white to gray to pink (mottled), micaceous ____ Sand: coarse-grained, angular, limonitic 47 266 260 526 Summary: Upper Eocene (Barnwell formation) __ Upper Cretaceous (Tuscaloosa formation) 219 219 307 526 Potential Water-Bearing Zones: Limestone _______ Sand: coarse-grained ____ 14 219 260 526 Remarks: Overall quality of samples for this well is poor. Delineation of water-bearing sands below depth of 266 feet is not feasible. 428 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 12 mi. northwest of Sandersville Owner: No. 1 Lillian-B Driller: Middle Georgia Oil and Gas Company Drilled: January 1921 WASHINGTON COUNTY Well No.: GGS 223 Thickness Depth (feet) (feet) No samples __________________ ---------------------------------------- 300 300 In Upper Cretaceous: Tuscaloosa Formation: Kaolin: white to cream, sandy, micaceous.______ 18 318 Sand: somewhat indurated, fine to coarse-grained, angular, arkosic -------------------------------------------------------------------------------------------------- 5 323 Clay: yellow to light-tan, micaceous, very sandy__ 5 328 Kaolin: light-gray, micaceous, very sandy_________________ 12 340 Clay: tan to olive-green, very sandy, micaceous__________ 5 345 Kaolin: light-gray to pink (mottled), very sandy, micaceous 5 350 No samples ------------------------------------------------------------------ ___________________________ 10 360 Clay: reddish-brown, highly micaceous, sandy 5 365 Kaolin: cream, very sandy, highly micaceous _ 13 378 No samples ------------------------------------------------------------------------ 3 381 Kaolin: cream, very sandy, highly micaceous _____ 11 392 Basement Complex (Undifferentiated): Clay: light-gray to yellowish-green, sandy, highly micaceous, flakes of biotite______________________________________ ------------------------------------------- 3 395 Crystalline rock1 ? ? Summary: No samples ----------------------------- ________________________________________________________ 300 300 In upper Cretaceous (Tuscaloosa formation) ____________________________ _ 92 392 Basement complex (undifferentiated) _______________________ 3 395 Potential Water-Bearing Zones: None observed in interval covered by available samples. 'Unweathered biotite gneiss (?) in sample which apparently was derived below the depth of 392- 395, the last sample carrying depth identification. Sample 392-395 appears to be weathered biotite gneiss ( 1). WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 429 Location: 12.7 mi. west of Sandersville via Highway 24 and 0.9 mi. north of Highway 24 at quarry Owner: Chemical and Minerals Corporation Driller: Bostick Drilling Company Drilled: May 1955 WASHINGTON COUNTY Well No.: GGS 433 Elev.: 318 Thickness Depth1 (feet) (feet) No samples_ 30 30 In Upper Cretaceous: Tuscaloosa Formation: Clay (or kaolin): white to pink (mottled), micaceous, sandy______ 20 50 Sand: fine- to coarse-grained, angular; some clay, as above__________ 60 110 Sand: fine to coarse-grained, angular________________________________________________ 30 140 Sand: as above; some clay, brick-red, micaceous, sandy________________ 100 240 Sand: coarse-grained, angular_______________________ ----------------------------------- 80 320 Summary: No samples ------------------------------------------------------------------------- ________________________ 30 30 In upper Cretaceous (Tuscaloosa formation)---------------------------------------- 290 320 Potential Water-Bearing Zones: Sand: fine to coarse-grained____________________________________________________________________ 24 128 Sand: fine to coarse-grained___________________________________________________________________ 20 176 Sand : fine to coarse-grained____________________________________________________________________ 16 208 Sand: coarse-grained -------------------------------------------------------------------------------- 20 290 Sand: coarse-grained ___ ---------------------------------------------------------------------------- 15 311 Remarks: Overall quality of samples somewhat poor. Location: In Tennille Owner: City of Tennile WASHINGTON COUNTY Well No.: GGS 521 Elev.: 460 1 Thickness Depth' (feet) (feet) No samples __ 55 55 In Upper Eocene: Jackson Group: Barnwell Formation: Clay: olive-green to tan, very sandy, limonitic, with inclusions of residual limestone________________________________________________________________________ ? 55 1Average elevation based on Georgia State Highway Maps. 2Spot samples at depths listed in log. 430 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Limestone: white, sandy; sand, coarse-grained, subrounded grains ____ _ ? Sand: fine to medium-grained, angular, fossiliferous (some macroshells) ; some clay, yellowish-green__ _______________________ ? Clay: yellowish-green, sandy, finely disseminated phosphatic grains, fossiliferous (echinoid and bryozoan remains, Ostra- cods, and Foraminifera)_______ __________________________ ? Siphonina jacksonensis, Valvulineria jacksonensis, Nonion advena, Cibicides cf. C. refulgens, Cibicides lobatulus at 245. Depth (feet) 90 150 245 Summary: No samples _________________________ -------------------------------In upper Eocene (Barnwell formation)_ 55 55 190 245 Potential Water-Bearing Zones: None observed in samples available for this well. Location: 8.5 mi. southeast of Jesup, Land Lot 7, 333rd Land District Owner: Brunswick Peninsular Corporation Driller: The California Co. Drilled: December 1944 WAYNE COUNTY Well No.: GGS 52 Elev.: 73 (derrick floor) Thickness Depth (feet) (feet) No samples _______ 74 74 In Miocene (Undifferentiated): Sand: fine to coarse-grained, angular, phosphatic; limestone, gray to cream, dense (calcitized), sandy, phosphatic, fossil- iferous (molds and impressions of macroshells) ____________ _ 389 463 Sand: as above; clay, dark-green, sandy, fossiliferous (macro- shells and fish teeth)------------------------------------------------------------------------- 31 494 Sand: fine to coarse-grained, phosphatic; limestone, white, sandy 29 523 Sand: fine to coarse-grained, phosphatic; dolomitic limestone, light-brown, saccharoidal, phosphatic_________ ------------------------------- 157 680 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 431 Oligocene (Undifferentiated): Thickn<>ss (feet) Sand and limestone: as above; limestone, light-gray, nodular, dense (calcitized), fossiliferous (some Foraminifera) 45 Quinqueloculina sp., Pyrgo sp. at 680-710. Dictyoconus1 sp. at 710-725. Limestone: cream, fossiliferous; some dolomitic limestone, as above ____ .____ --------------------------------------------------------------------------- 14 Depth (feet) 725 739 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream to light-gray, massive, dense (much calci- tized), fossiliferous (macroshells, bryozoan remains, and some Foraminifera) _____________ _____ ____________ _______ _______________ ________________ 94 833 Asterocyclina nassauensis, Gypsina globula at 756-771. Pseudophragmina flintensis, Operculinoides floridensis at 771-787. Limestone: as above; some dolomitic limestone_______ 62 895 Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, and some dolomitic limestone, as above _---------------------------------- ------------------------------------------------------------ 88 No samples --------------------------------------------------------------------------- ----------------- 99 Dolomitic limestone: brown, saccharoidaL___ -------------- ______________ 54 Dolomitic limestone: as above; some limestone, light-gray, sac- charoidal, granular (in texture)__ ------------------ 16 No samples_ 31 Limestone: light-gray, somewhat granular (in texture), finely disseminated glauconite, fossiliferous__________________________________________ 167 Asterocyclina monticellensis at 1183-1214. Lepidocyclina (Polylepidina) antillea at 1245-1255. Sand: fine to coarse-grained, phosphatic; interbedded lime- stone, cream, somewhat massive 280 Sand: as above; dolomitic limestone, light-brown, saccharoidal, cherty __ --------------------- ------------------------------- -------------------- 77 Limestone: cream, granular (in texture), dense (much calci- tized), cherty _______________ ____ -------------------------- ________________ 243 Asterocyclina monticellensis common at 1857-1873. 'Reworked (?) fossil of middle Eocene age. 983 1,082 1,136 1,152 1,183 1,350 1,630 1,707 1,950 432 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Dolomitic limestone: light-brown, saccharoidal; some lime- stone, as above_________________________________________________________ 40 Dolomitic limestone: as above, but coarsely glauconitic 5 Dolomitic limestone: as above; some indurated sand, fine- grained, abundantly glauconitic; interbedded clay, pale- green, fissile, silty, gypsiferous, finely glauconitic, abun- dantly and coarsely glauconitic and fossiliferous at depth 125 Sand: fine to coarse-grained, phosphatic_____ 85 Depth (feet) 1,990 1,995 2,120 2,205 Lower Eocene: Wilcox Group (Undifferentiated): Sand: fine to coarse-grained, glauconitic; interbedded limestone, white, dense (much calcitized), sandy, coarsely glauconitic, fossiliferous (molds and fragments of macroshells) 165 Eponides dorji, Valvulineria wilcoxensis at 2205-2212. Marl: dark-gray, silty, micaceous, carbonaceous, fossiliferous (some Foraminifera) ____________________________________ 175 Eponides dorji, Valvulineria scrobiculata, Cibicides howelli at 2473-2545. Paleocene: Midway Group: Clayton Formation: Sand: somewhat indurated at certain horizons, fine-grained, glauconitic; interbedded marl, dark-gray to black, fissile, carbonaceous, finely micaceous, fossiliferous (some Foraminifera) _____________ ----------------------------------------- ---------------------------------- 90 Eponides lotus, Polymorphina cushmani, Siphonina prima, Cibicides pmecursorius, Cibicides howelli at 2545-2550. Limestone: cream, dense (much calcitized), nodular (in tex- ture), somewhat saccharoidal, fossiliferous (molds of mac- roshells, bryozoan remains, and occasional Ostracods and Foraminifera) _____________________ ------------------------------------------------ 24 Sand: somewhat indurated at certain horizons, fine-grained, micaceous, glauconitic ___________________________________ 121 Sand: fine-grained, glauconitic; interbedded marl, black, fis- sile, carbonaceous, finely micaceous, somewhat fossiliferous (Foraminifera) ----------------------------------------------------------------- 120 2,370 2,545 2,635 2,659 2,780 2,900 Upper Cretaceous: Post-Tuscaloosa (Undifferentiated): Marl: bluish-gray to brown, sandy, micaceous, glauconitic, fossiliferous (macroshells, Ostracods, and Foraminifera) ___ 625 Globotruncana sp., Guembelina sp. at 2900-2903. 3,525 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 433 Marl: as above, but much sandier__ Thickness (feet) 540 Anomalina sp., Globorotalia micheliniana at 3525-3540. Planulina cf. P. taylorensis at 3540-3555. Kyphopyxa christneri at 3612-3626. Vaginulina texana at 3693-3708. Sand: fine to medium-grained, somewhat indurated at certain horizons, glauconitic, phosphatic, abundantly micaceous. 65 Depth (feet) 4,065 4,130 Tuscaloosa Formation: Sand: fine to medium-grained, indurated, finely glauconitic, very micaceous, fossiliferous (macroshells) ; interbedded shale, greenish to dark-gray, fissile, finely micaceous 445 4,575 Basement Complex (Undifferentiated): Quartzite? _______ ---------------------------------------------------------------------------- 50 4,625 Summary: No samples ------------------------------------------------------------------------------------ 74 In Miocene (undifferentiated) --------------------------------------------------------------- 606 0 ligocene (undifferentiated) ________________ ------------------------------------------------- 59 Upper Eocene (Ocala limestone)---------------------------------- 156 Middle Eocene (Claiborne group, undifferentiated) __ ---- 1,310 Lower Eocene (Wilcox group, undifferentiated) ____ 340 Paleocene (Clayton formation) _____ ------------------------------- 355 Upper Cretaceous (post-Tuscaloosa, undifferentiated) __________________ 1,230 Upper Cretaceous (Tuscaloosa formation) 445 Basement complex (undifferentiated)_______ 50 74 680 739 895 2,205 2,545 2,900 4,130 4,575 4,625 Potential Water-Bearing Zones: Limestone ___ ------------------------------------------------------------------------------- 180 Sand: fine to coarse-grained -------------------------------------------------------- 61 Sand: fine to coarse-grained ----------------------------------------------------- 280 Sand: fine to coarse-grained ---------------------------------------------------------- 70 Sand: fine-grained 1 ___ ____________________________ ----------------------------- 65 860 956 1,630 2,370 2,635 1Probably contains salt water. 434 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 0.5 mi. southwest of Mt. Pleasant Owner: No.1 Southern Pines Products Company Driller: Hughes Specialty Well Drilling Company Drilled: September 1906 WAYNE COUNTY Well No.: GGS 96 Elev.: 59 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, subangular, finely dissemi- nated phosphatic grains; interbedded clay, dark-gray, silty, lignitic, micaceous, fossiliferous at certain levels (macro- shells and echinoid remains)--------------------------------------------- ______________ 40 40 Sand: coarse-grained, subangular, sparsely phosphatic_ 4 44 In Miocene: Duplin Marl: Marl: gray to pale-green, somewhat indurated and sandy, fossiliferous (megafossils, echinoid remains, and Ostracods)____ 27 71 Shell bed prominent at 69-71. Hawthorn Formation: Clay: dark-green, rather tough, somewhat indurated, sandy__ 55 126 No samples ___ 21 147 Sand: fine-grained __ 13 160 Sand: fine to coarse-grained, phosphatic__ 60 220 Clay: dark-green, sandy, phosphatic_ 65 285 Sand: fine to coarse-grained, phosphatic; interbedded clay, dark-green, sandy, phosphatic___________________ ________________ ______________ 115 400 Sand: fine to coarse-grained, phosphatic; interbedded lime- stone, white, dense, sandy__________________________________________________________________ 80 480 Dolomitic limestone: light-brown, saccharoidal, sandy, phos- phatic -------------------------------------------------------------------------------------------------- 30 510 Oligocene (Undifferentiated): Limestone: light-gray, dense (much calcitized), crystalline, nodular, fossiliferous (Foraminifera)------------------------------------------ 50 560 Rotalia byramensis var. at 510-523. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 435 Summary: Thickness (feet) Pliocene to Recent (undifferentiated) ____________________________________________ 44 In Miocene (Duplin marl) ________________________________ -------------------------- 27 Miocene (Hawthorn formation)_____ ____________________________ 439 Oligocene (undifferentiated) __ _____________________ _ 50 Depth (feet) 44 71 510 560 Potential Water-Bearing Zones: Sand: fine to coarse-grained_____________________________________________________ Limestone _________ --------------------------------------------------------------------------------- 60 220 50 560 Location: 1500 ft. south of Altamaha River at Doctortown Owner: No. 1 Rayonier Corporation Driller: Layne-Atlantic Company Drilled: January 1952 WAYNE COUNTY Well No.: GGS 262 Elev.: 100 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: medium-grained to coarse-grained at depth, subangu- lar to subrounded, arkosic; interbedded clay (or kaolin?), white, sandy, micaceous __ _ 40 40 Miocene (Undifferentiated): Clay: pale-brownish-gray to dark-brown at depth, somewhat mottled (with red streaks), sandy, micaceous____ 15 55 Clay: dark to pale green, sandy, phosphatic; beds of sand __ 305 360 Sand: fine to coarse-grained, phosphatic; interbedded lime- stone, white, dense (much calcitized), sandy, phosphatic_ 140 500 Dolomitic limestone: brown, saccharoidal, sandy, phosphatic _ 25 525 No samples _______ 5 530 In Oligocene (Undifferentiated): Limestone: gray, dense (much calcitized), nodular, fossilifer- ous (some Foraminifera)------------------------------------------------------------------ 15 545 Operculinoides sp. at 530-545. 436 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Upper Eocene: Jackson Group: Ocala Limestone: Thickness (feet) Limestone: white, dense (much calcitized), fossiliferous (bryozoan remains, macroshells, and Foraminifera)-------------------------- 305 Gypsina globula, Asterocyclina nassauensis at 545-555. Camerina striatoreticulata at 710-715. Amphistegina pinarensis var. at 720-725. Depth (feet) 850 Middle Eocene: Claiborne Group (Undifferentiated): Dolomitic limestone: brown, saccharoidal ----------------------- _______________ 50 900 Summary: Pliocene to Recent (undifferentiated) ________________ --------------------------------- 40 40 Miocene (undifferentiated) -------------------------------------------------------------------- 485 525 No samples ------------------------------------------------ ------------------------------------------------- 5 530 In Oligocene (undifferentiated) ______________ ----------------------------------------------- 15 545 Upper Eocene (Ocala limestone)------------------------------------------------------------ 305 850 Middle Eocene (Claiborne group, undifferentiated)_________________________ 50 900 Potential Water-Bearing Zones: Sand: fine to coarse-grained__________________________ ----------------------------- 52 187 Sand: fine to coarse-grained _________ -------------------------------------- 41 310 Sand: fine to coarse-grained____________________________________________________________________ 140 500 Limestone ---------------------------------------------------------------------------------------------------- 270 815 Location: East side of U.S. Highway 25, south side of Altamaha River, at Rayonier Plant Owner: No.1 Rayonier Inc. Driller: Layne-Atlantic Company Drilled: April 1952 WAYNE COUNTY Well No.: GGS 297 Elev.: 100 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, finely disseminated phosphatic grains; interbedded kaolin, white, somewhat sandy__________________________________ 38 38 No samples _________________________ 120 158 In Miocene (Undifferentiated) : Sand: fine to coarse-grained, rounded, phosphatic___________________ 60 218 Clay: dark-green, sandy_______________________________ 42 260 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 437 Thickness (feet) No samples __________________ --------------------------------------------------------------------------- 50 Sand: fine to coarse-grained, phosphatic__________________________________________ 60 Depth (feet) 310 370 Sand: as above; interbedded dolomitic limestone, light-brown, saccharoidal, sandy, phosphatic------------------------------------------------------- 80 450 No samples ---------------------------------------------------------------------------------------------- 25 475 Limestone: white, dense (much calcitized), sandy, phosphatic, fossiliferous (fragments and molds of megafossils)__________________ 16 491 No samples ---------------------------------------------------------------------------------------------- 104 595 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream to white, somewhat saccharoidal (much cal- citized), fossiliferous (bryozoan remains and Foraminifera)____ 230 825 Pseudophragmina flintensis, Gypsina globula at 595-605. Asterocyclina nassauensis at 605-615. Amphistegina pinarensis var. at 765-775. Middle Eocene: Claiborne Group (Undifferentiated): Dolomitic limestone: light-brown, saccharoidaL __________________ 80 905 Limestone: light-gray, rather dense (calcitized), fossiliferous (Foraminifera) ----------------------------------- _-------------------------------------------- 40 945 Miliolidae abundant at 905-945. No samples ___________ ------------------------------------- 40 985 Dolomitic limestone: light-brown to black, saccharoidaL 7 992 Summary: Pliocene to Recent (undifferentiated)_____________ 38 38 No samples -------------------------------------------------------------------- 120 158 In Miocene (undifferentiated)_ ____ ___________ ---------------------------- 333 491 No samples ---------------------------------------- ______________ -------------------------------- 104 595 In upper Eocene (Ocala limestone)_______ ____________________________ 230 825 Middle Eocene (Claiborne group, undifferentiated) _________________________ 167 992 Potential Water-Bearing Zones: Sand: fine to coarse-grained Sand: fine to coarse-grained ______ Limestone --------------------------------------------------------------- 60 218 60 370 230 825 438 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Odum Owner: City of Odum Driller: M. M. Gray Drilled: 1955 WAYNE COUNTY Well No.: GGS 454 Elev.: 1551 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to coarse-grained, angular, arkosic; interbedded clay, light-gray to pale-green, sandy _________ 120 120 Mottled sandy clay at 0-10. Coarse-grained arkosic sand at 60-70. Tubular worm borings ( ?) prominent at 80-100. Fine to coarse-grained, angular, arkosic sand at 100-120. Miocene (Undifferentiated): Clay: pale-green, sandy, phosphatic; interbedded sand, fine to coarse-grained, phosphatic; clay, pale-green, sandy, phos- phatic; dolomitic limestone, light-brown, saccharoidal, sandy, phosphatic; and limestone, white, sandy, coarsely phosphatic, fossiliferous (macroshells) ________________ _ 470 590 Dolomitic limestone, light-brown, sandy, phosphatic at 300350, 400-430, 490-510, and 580-590. Oligocene (Undifferentiated): Limestone: gray, extremely dense (highly calcitized), nodu- lar, fossiliferous (some Foraminifera) __ _ 50 640 Rotalia byramensis var., Lepidocyclina sp. at 610-620. Miliolidae common, Dictyoconus 2 sp. at 620-630. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: as above, very fossiliferous (macroshells, bryo- zoan remains, and Foraminifera) __ _ 70 710 Operculinoides sp. at 640-650. Operculinoides cf. 0. floridensis at 660-670. Operculinoides sp. abundant, Asterocyclina nassauensis, Pseudophragmina flintensis, Gypsina globula at 670-680. 1Average elevation based on Georgia State Highway Maps. 2Reworked( ?) fossil of middle Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 439 Summary: Thickness (feet) Pliocene to Recent (undifferentiated)_______________ 120 Miocene (undifferentiated) ______________________________ -------------- 470 Oligocene (undifferentiated) ------------------------------------------------- ________________ 50 Upper Eocene (Ocala limestone)------------------------------------------------ 70 Depth (feet) 120 590 640 710 Potential Water-Bearing Zones: Sand: fine to coarse-grained___ 10 70 Sand: fine to coarse-grained __ 20 120 Sand: fine to coarse-grained ___ ------------------------------------------------- 50 490 Limestone ________ ------------------------- -------------------------------------------------- -------------- 110 710 Location: 0.75 mi. south of Screven city limits, west side of Highway 38 Owner: No. 1 Lindsey Grace Driller: Layne-Atlantic Company Drilled: 1955 WAYNE COUNTY Well No.: GGS 466 Elev.: 118 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, angular, arkosic_ 5 5 Clay: yellowish-green, sandy_____________________________________________________________ 10 15 Sand: fine to coarse-grained, angular, arkosic; some clay, pale green to purple (mottled), sandy_ _________________ 30 45 Sand: very coarse-grained, arkosic _______ 30 75 Miocene (Undifferentiated): Clay: yellowish-green to dark-green, phosphatic at depth 175 250 Black phosphatic pebbles common at 145-155. Sand: coarse-grained, phosphatic_____ 40 290 Sand: as above; interbedded clay, dark-green, sandy, phos- phatic; and dolomitic limestone, light-brown, sandy, phos- phatic __ ----------------------------------------------- ----------------------------------- 103 393 Clay: dark-green, sandy, phosphatic ______ 123 516 Dolomitic limestone: dark-brown, saccharoidal, sandy, phos- phatic___________________________ __ ______ _______________ _ 84 600 No samples _________ _ 20 620 440 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 In Oligocene (Undifferentiated): Thickness (feet) Limestone: cream, rather massive (calcitized), fossiliferous (Foraminifera) --------------------------------------------------------------------------------- 80 Dictyoconus 1 sp., Quinqueloculina sp. at 620-640. Depth (feet) 700 Summary: Pliocene to Recent (undifferentiated)-------------------------------------------------- 75 75 Miocene (undifferentiated) ------------------------------------------------------------------- 525 600 No samples ------------------------------------------------------------------------------------------------ 20 620 In Oligocene (undifferentiated) ___________ ----------------------------------------- 80 700 Potential Water-Bearing Zones: Sand: coarse-grained ---------------------------------- ---------------------------------Limestone -------------------------------------------------------------------------------------------- 40 290 80 700 Location: In Jesup Owner: City of Jesup Driller: Bailey Drilling Company Drilled: May 1958 WAYNE COUNTY Well No.: GGS 555 Elev.: 100 Thickness Depth (feet) (feet) Pliocene to Recent (Undifferentiated): Sand: fine to medium-grained, angular, arkosic, phosphatic (finely disseminated) ; interbedded clay, dark-gray, silty, lignitic, micaceous ---------- -------------------- _______________________ 74 74 Miocene (Undifferentiated): Sand: coarse-grained, subangular; some clay, yellowish to dark-green, blocky, sandy, phosphatic at depth_______________ 21 95 Clay: yellowish to dark-green, blocky, sandy, phosphatic_ 190 285 Light-brown phosphatic pebbles at 95-105. Jet-black phosphatic pebbles at 141-152. Sand: coarse-grained, subangular, phosphatic; some clay, as above --------------------------------------------------------------------------------------------------- 68 353 Dolomitic limestone at 305-323. Clay: as above.------------------------------------------------------------------------- 61 414 'Reworked( 1) fossil of middle Eocene age, WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 441 Thickness (feet) Sand: coarse-grained, subangular, phosphatic; interbedded dolomitic limestone, light-brown, saccharoidal, sandy, phosphatic ------------------------------------------------------------------------------------------------- 61 Dolomitic limestone: as above; interbedded thin tongues of sand and clay, as above__________ ----------------------------- ----------------------------- 61 Limestone: light-gray, dense, sandy, phosphatic, fossiliferous (echinoid remains and macroshells) ______ _____________ ___ 40 Depth (feet) 475 536 576 Oligocene (Undifferentiated): Limestone: cream, rather massive, nodular, much calcitized and recrystallized, porous, fossiliferous (casts and molds chiefly of Gastropods, some echinoid and bryozoan remains, and Foraminifera) _____ ________________ _____________ _ 50 626 Quinqueloculina sp. at 576-586. Quinqueloculina sp., Rotalia sp., Gypsina globula\ Dictyoconus1 sp. at 586-596. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: as above, but lighter-colored at depth, fossilifer- ous (bryozoan remains and Foraminifera) ____________ 69 695 Operculinoides sp., Operculinoides floridensis, Asterocyclina nassauensis, Pseudophragmina flintensis, Gypsina globula at 626-636. Summary: Pliocene to Recent (undifferentiated) Miocene (undifferentiated) ________________________ Oligocene (undifferentiated) _______________________ Upper Eocene (Ocala limestone) ___________ _ 74 74 502 576 50 626 69 695 Potential Water-Bearing Zones: Sand: fine to coarse-grained________________ _ Sand: fine to coarse-grained___________________ Limestone ------------------------------------ _______________ 68 353 61 414 159 695 'Reworked(?) fossil of middle Eocene age. 442 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 WEBSTER COUNTY Location: Approximately 6.2 mi. northwest of road june- Well No.: GGS 323 tion in Preston via Highway 280 to fork in road, 0.8 mi. Elev.: 586 due north of Highway 280 via county road, east side of county road in road fork Owner: No.1 E. C. Downer Driller: Southeastern Drilling Company Drilled: October 1952 Thickness Depth (feet) (feet) Upper Cretaceous: Providence Sand: Clay: bluish-gray to brick-red (somewhat mottled), very sandy, limonitic _______________________ --------------------------------------------------------- 30 30 Sand: fine to coarse-grained, very angular, arkosic; inter- bedded clay, gray to red (mottled), micaceous, sandy_______________ 145 175 Ripley Formation: Clay: dark bluish-gray to black, somewhat fissile, lignitic, micaceous, sandy ___ _____ --------------------------------- 15 190 Summary: Upper Cretaceous (Providence sand) ____ Upper Cretaceous (Ripley formation) __ 175 175 15 180 Potential Water-Bearing Zones: Sand: fine to coarse-grained_______ ------------------------------------- 4 114 Sand: fine to coarse-grained_________________ ----------------------------- 6 138 Sand: fine to coarse-grained__ Sand: fine to coarse-grained__ --------------------------------------------- 6 152 __ _________ _________________ 10 166 Remarks: Owing to ground-water leakage (springs) all sands listed above as potential sources of ground water may be dry. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 443 WEBSTER COUNTY Location: Northeastern part of county, 7.5 mi. northeast Well No.: GGS 488 of road junction in center of Preston via Highway 153, south side of Highway Owner: No.1 Winkler Farm Driller: Southeastern Drilling Company Drilled: March 1956 Thlckness (feet) Depth (feet) Middle Eocene: Claiborne Group: Lisbon Formation: Sand: argillaceous, brick-red, fine to coarse-grained, angular, limonitic -------------------------------------------------------------------------------------- 40 40 Clay: olive-green to red (mottled), blocky, sandy__ 20 60 Tallahatta Formation: Sand: fine to coarse-grained, angular, massive; interbedded clay, gray to red (mottled), micaceous, sandy________ 108 168 Lower Eocene: Wilcox Group (Undifferentiated): Clay: black, fissile, carbonaceous, micaceous, coarsely glau- conitic at depth. 18 186 Paleocene: Midway Group: Clayton Formation: Limestone: light-gray, crystalline, coarsely but sparsely glau- conitic, fossiliferous (casts and molds of megafossils, bryo- zoan remains, and Foraminifera) ______________ _ 9 195 Discorbis midwayensis, Eponides lotus, Cibicides praecursorius, Cibicides newmanae at 190-195. Upper Cretaceous: Providence Sand: Clay: yellowish-green to red (mottled), micaceous, sandy; in- terbedded sand, fine to coarse-grained, angular, arkosic 35 230 Summary: Middle Eocene (Lisbon formation)---------------------------------Middle Eocene (Tallahatta formation) ______ Lower Eocene (Wilcox group, undifferentiated) ___ Paleocene (Clayton formation)_ Upper Cretaceous (Providence sand) ______ 60 60 108 168 18 186 9 195 35 230 Potential Water-Bearing Zones: Sand: fine to coarse-grained___ _ Sand: fine to coarse-grained______ 14 108 6 146 444 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Remarks: All potential water-bearing sands above depth of 200 feet are probably dry due to local rugged topography and ground-water leakage (springs). Above well should have been drilled deeper in order to penetrate the underlying Providence sand which is known to contain good water-bearing sands. Location: Owner: No. 1 Webster County Elementary and High School Driller: Southeastern Drilling Company WEBSTER COUNTY Well No.: GGS 559 Elev.: 535 Thickness Depth (feet) (feet) Residuum: Clay: brick-red, very sandy, limonitic 10 10 Clay: bluish-gray to yellow to tan to dark-red (mottled), sandy, limonitic ----------------------------------------------------------------------------- 20 30 Middle Eocene: Claiborne Group: Tallahatta Formation: Sand: fine to coarse-grained, coarser-grained with depth, very angular, sparsely phosphatic______________________________________________ 70 100 Lower Eocene: Wilcox Group (Undifferentiated): Marl: dark-gray to black, lignitic, pyritiferous, micaceous, glauconitic; some sand, fine to coarse-grained, angular, somewhat arkosic __________________________ ----------------------------------------------- 30 130 Limonite prominent at 100-110. Glauconite abundant at 110-120. Sand: fine to coarse-grained, angular; some marl, as above 10 140 Paleocene: Midway Group: Clayton Formation: Clay: light-gray, blocky, carbonaceous, micaceous, silty___ 10 150 Clay: black, fissile, carbonaceous, micaceous (finely dissemi- nated); limestone, cream, dense, crystalline, coarsely glau- conitic, pyritiferous, fossiliferous (fragments, casts and molds of megafossils, echinoid and bryozoan remains, Os- tracods, and Foraminifera); sand, as above_______________________ 10 160 Limestone: as above______________________________________________________________________________ 20 180 Eponides lotus, Anomalina midwayensis, Discorbis midwayensis, Cibicides howelli at 160-170. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 445 Thickness (feet) Limestone: light-gray, dense, crystalline, glauconitic, fossiliferous (fragments, casts and molds of megafossils, echinoid and bryozoan remains, Ostracods, and Foraminifera)______ 10 Limestone: cream, dense, crystalline, glauconitic, sandy, sandier with depth, fossiliferous (casts and molds of megafossils) __ ------------------------------------------------------------------------------- ____________ 15 Sand: fine to coarse-grained, angular_-------------------------------------- 10 Depth (feet) 190 205 215 Upper Cretaceous: Providence Sand: Sand: fine to coarse-grained, angular, arkosic; some clay, gray to red (mottled), sandy, micaceous________________________ 15 230 Mica flakes prominent at 220-230. Summary: Residuum _______________________ --------------------------- __________________ 30 30 Middle Eocene (Tallahatta formation)--------------------------------_________________ 70 100 Lower Eocene (Wilcox group, undifferentiated)________________________________ 40 140 Paleocene (Clayton formation)---------------------------------------- --------------------- 75 215 Upper Cretaceous (Providence sand) _______ --------------------- 15 230 Potential Water-Bearing Zones: Sand: fine to coarse-grained____________ 10 140 Limestone -------------------------------------------- ------------------------------------------------------- 45 205 Sand: fine to coarse-grained____________ --------------------------- --------------------------- 10 215 WHEELER COUNTY Location: 3.4 mi. northwest of Southern R.R. Depot at Scotland, west side of north-south county road at dwelling Owner: No. 1 H. G. Samples Driller: J. L. Clegg Drilled: 1943 Well No.: GGS 92 Elev.: 243 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic 40 40 Clay: light-gray, sandy 65 105 Sand: fine to coarse-grained, angular _______ ------------------------------------ 73 178 Clay: yellowish-green, sandy 76 254 446 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated): Thickness (feet) Limestone: white, dense, nodular, much calcitized, fossiliferous (some Foraminifera) --------------------------------- ------------------------------ 34 Rotalia mexicana var. at 254-274. Depth (feet) 288 Miocene (undifferentiated) _ Oligocene (undifferentiated) Summary: 254 254 34 288 Limestone Potential Water-Bearing Zones: 34 288 WHEELER COUNTY Location: 3.5 mi. east of Little Ocmulgee River, north side of Highway 15, Land Lot 486, 7th Land District Owner: No.1 Charles W. Jordan Heirs Driller: Natural Resources Corporation Drilled: 1954 Well No.: GGS 336 Elev.: 190 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: brick-red, very sandy, limonitic 20 20 Clay: tan to purple to red (mottled), sandy, limonitic __ _ 10 30 Sand: fine-grained, angular, phosphatic (finely disseminated grains); some clay, yellowish-green, blocky, sandy __________________ 30 60 Clay: light-brown, sandy__________ 20 80 Sand: fine-grained to coarser-grained at depth, angular, arkosic ___ ---------------------------------- 50 130 Clay: light-brown to yellowish-green, blocky, sandy __ 60 190 Clay: as above but much sandier, phosphatic at depth 40 230 Brown phosphatic pebbles at 210-220. Clay: as above; interbedded limestone, white, sandy __ _ 90 320 White sandy limestone prominent at 240-250. Clay: dark-green, blocky, phosphatic, sandy _____ 20 340 Sand: fine-grained, angular; some clay, as above ___ 10 350 Sand: as above; some limestone, light-brown, very sandy, phosphatic, fossiliferous (macroshells) ---------------------------------------- 10 360 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 447 Oligocene (Undifferentiated): Thickness Depth (feet) {feet) Limestone: light-gray to somewhat reddish-brown at depth, massive, dense, somewhat nodular, much calcitized, cherty at certain levels, sandy, sparsely phosphatic near top, fos- siliferous (casts and molds of megafossils, some echinoid and bryozoan remains, and Foraminifera) ____________________ 90 450 Rotalia mexicana var. at 360-370. Gypsina globulal, Lepidocyclina1 sp. at 400-410. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: light-gray, much calcitized, crystalline, somewhat granular (in texture), much softer than limestone above, fossiliferous (abundant bryozoan remains and some Fora- minifera) -------------------------------------------------------------------------------------------- 230 680 Robulus arcuato-striatus var., Nonion planatus, Eponides jacksonensis, Rotalia mexicana var., Asterigerina subacuta, Lepidocyclina sp. at 450-460. Operculinoides floridensis and bryozoan remains common to abundant at 490-500. Asterocyclina nassauensis at 570-580. Limestone: cream, much calcitized, granular and somewhat loosely consolidated, dolomitized at certain horizons, fossili- ferous (bryozoan remains and Foraminifera); some mas- size limestone, gray to white, nodular, fossiliferous (macro- shells and bryozoan remains) _____________ ______________ ________________ 180 860 Camerina striatoreticulata at 680-690. Amphistegina pinarensis var., Pseudophragmina flintensis at 690-700. Dolomitic limestone prominent at 710-720. Operculina mariannensis at 730-740. Dolomitic limestone prominent at 820-830. Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, angular; some limestone, as above ____ ------------------------------------------------------------------------------------------ 40 900 Sand: fine to medium-grained, angular, somewhat argillaceous, indurated at certain levels, phosphatic, micaceous; interbedded marl, light-gray, silty, glauconitic, micaceous, 1Reworke'd ( ?) fossil of middle Eocene age. 448 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) fossiliferous (fish teeth, Ostracods, and Foraminifera); limestone, light-gray, dense, massive, crystalline, fossilifer- ous (macroshells and some bryozoan remains) 240 Glauconite common at 1020-1030. Macroshells abundant at 1100-1110. Sand: fine to medium-grained, angular, coarsely glauconitic 60 Marl: dark-gray, silty, carbonaceous, glauconitic, micaceous, fossiliferous (Ostracods and Foraminifera) 130 Depth (feet) 1,140 1,200 1,330 In Lower Eocene and Paleocene (Undifferentiated): Marl: dark-gray to black, fissile, carbonaceous, micaceous, abundantly glauconitic ___________________ 20 Glauconite abundant at 1330-1340. Limestone: gray, dense, crystalline, glauconitic, fossiliferous (fragments, casts and molds of megafossils); some marl and sand, as above ____________________________ ------------------------- _________________ 100 Sand: fine to medium-grained, angular, phosphatic, fossiliferous (macroshells at certain horizons) __________________________________ 100 Sand: fine to medium-grained, angular, phosphatic; interbedded marl, dark-gray to black, fissile, carbonaceous, micaceous; limestone, light-gray, crystalline (in texture), sandy_ 230 1,350 1,450 1,550 1,780 'Upper Cretaceous: Providence and Ripley (Undifferentiated): Marl: dark-gray, sandy, very micaceous, fossiliferous (macro- shells, Ostracods, and Foraminifera) ------------------------------ 400 Gaudryina rudita, A nomalina pseudopapillosa at 1790-1800. 2,180 Summary: Miocene (undifferentiated) ______________ 360 Oligocene (undifferentiated) ----------------------------- 90 Upper Eocene (Ocala limestone) ------------------------------------------------ 410 Middle Eocene (Claiborne group, undifferentiated) ________________________ 470 In lower Eocene and Paleocene (undifferentiated)---------------------------- 450 Upper Cretaceous (Providence and Ripley, undifferentiated) __________ 400 360 450 860 1,330 1,780 2,1802 Potential Water-Bearing Zones: Limestone 500 Sand: fine to coarse-grained ------------------------------------------------------------------- 40 Sand: fine to medium-grained -------------------------------------------------------------- 60 Limestone --------------------------------------------------------------------------------------------------- 50 2 We1! not examined below 2180. 860 900 1,200 1,440 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 449 WHEELER COUNTY Location: G.2 mi. northeast of No. 1 Jordan Heirs (oil Well No.: GGS 337 test) at tenant house, southwest quarter of Land Lot 87, 6th Land District Owner: No.1 Emmett Joyce Driller: Dixie Well Drilling Company Drilled: 1953 Thickness Depth (feet) (feet) No samples 100 100 In Miocene (Undifferentiated): Clay: light-gray, sandy; sand, fine to medium-grained, angular__ 50 150 Sand: fine to medium-grained, angular, gray phosphatic pebbles ____ -------------------------------------------------------------------------------------------- 20 170 Clay: yellowish-green, sandy; fragments of limestone, white, rather dense, sandy -------------------------------------------------------------------------- 110 280 Sand: fine to medium-grained, subangular, phosphatic, fos- siliferous (a coquina at depth) ________________ _____ 65 345 Oligocene (Undifferentiated): Limestone: light-gray, dense, crystalline, somewhat nodular, sandy, sparsely phosphatic, fossiliferous (some macro- shells, bryozoan remains, Ostracods, and Foraminifera) ________ 105 450 Quinqueloculina sp. at 340-350. Rotalia mexicana var. at 350-360. Asterigerina subacuta, Operculinoides sp. at 370-380. Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, considerably calcitized, granular, fossili- ferous (some macroshells, echinoid and bryozoan remains and Foraminifera) _------------------------------------------------------ 160 610 Camerina striatoreticulata, Lepidocyclina sp. at 450-460. Carnerina striatoreticulata common at 460-470. Lepidocyclina ocalana at 580-590. Bryozoan remains common at 590-610. Summary: No samples _____________________ 100 100 In Miocene (undifferentiated) ------------------------------------------------------------- 245 345 Oligocene (undifferentiated) __ _ _____ _____ ________ 105 450 Upper Eocene (Ocala limestone) ___________________ ____________________ 160 610 Limestone Potential Water-Bearing Zones: 240 610 450 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: 1.5 mi. north of Pitts, west side of county road Owner: No. 1 A. C. Shell Driller: W. B. Graham Drilled: January 1947 WILCOX COUNTY Well No.: GGS 68 Elev.: 405 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: bluish-gray to red (mottled), sandy, limonitic; inter- bedded sand, fine to coarse-grained, angular, arkosic 140 140 Oligocene (Undifferentiated) i Limestone: white, dense, crystalline, cherty, fossiliferous (some Foraminifera) __________________ _______________ ____________ 10 150 Rotalia mexicana var. at 140-150. Miocene (undifferentiated) Oligocene (undifferentiated) Summary: Potential Water-Bearing Zones: Limestone _____________ ----------------------------------------------------------------------- 140 140 10 150 10 150 Location: Approximately 3 mi. southeast of Pitts, east side of county road at dwelling Owner: No. 1 H. A. Dorsey Driller: W. B. Graham Drilled: January 1947 WILCOX COUNTY Well No.: GGS 70 Elev.: 395 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: light-gray to red (mottled), sandy, limonitic _ 60 60 Clay: yellowish-green, sandy; residual limestone, at depth ______ 95 155 Oligocene (Undifferentiated): Limestone: white, dense, crystalline, cherty ------------------------------------ 19 174 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 451 Miocene (undifferentiated) Oligocene (undifferentiated) Summary: Thickness Depth (feet) (feet) 155 155 19 174 Limestone Potential Water-Bearing Zones: 19 174 Location:l.5 mi. east of Seville, 300 yd. east of tributary to Alapaha River, north side of Highway 280 Owner: No.5 U.S. Geological Survey test hole Driller: Scott Brothers Drilled: July 1946 WILCOX COUNTY Well No.: GGS 136 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic Clay: yellowish-green, sandy ______ Clay: as above, with fragments of residual limestone _ 10 10 60 70 10 80 Oligocene (Undifferentiated): Limestone: white, cherty, fossiliferous (some Foraminifera) 39 119 Rotalia mexicana var. at 100-110. Asterigerina sp. at 110-119. Miocene (undifferentiated) __ Oligocene (undifferentiated) Summary: 80 80 39 119 Limestone Potential Water-Bearing Zones: 39 119 452 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Approximately 3.5 mi. south of Pitts Owner: No.2 A. C. Shell Dr'iller: T. D. Yers Drilled: February 1947 WILCOX COUNTY Well No.: GGS 142 Elev.: 405 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic Clay: gray to yellowish-green, sandy 20 20 70 90 Oligocene (Undifferentiated): Limestone: white, dense, crystalline, cherty 50 140 Quinqueloculina sp. at 140-150. Limestone: white, soft, porous, fossiliferous (some Foramini- fera) _____ 57 197 Miocene (undifferentiated) Oligocene (undifferentiated) Summary: 90 90 107 197 Limestone Potential Water-Bearing Zones: 57 197 Location: State Fish Hatchery, Bowens Mill Owner: State (Georgia) Department of Wild Life Driller: Tucker and W offe Drilled: July 1953 WILCOX COUNTY Well No.: GGS 349 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, very sandy, limonitic __ _ Clay: light-gray to pale-green, sandy _______________ 45 45 10 55 In Oligocene (Undifferentiated): Limestone: white, crystalline, much calcitized, cherty, fos- siliferous (bryozoan remains and some Foraminifera) 52 107 Quinqueloculina sp., Rotalia mexicana var. at 60-75. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 453 Summary: Miocene (undifferentiated) _ ___ _ In Oligocene (undifferentiated) __ Thickness Depth (feet) (feet) 55 55 52 107 Limestone Potential Water-Bearing Zones: 42 107 Location: In Irwinton Owner: No. 1 William Sites Driller: Georgia-Florida Well Drilling Company Drilled: July 1955 WILKINSON COUNTY Well No.: GGS 441 Elev.: 465 1 Thickness Depth (feet) (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: brown, sandy, limonitic, and fragments of residual limestone ___________________ 40 40 Marl: yellowish-green, silty, fossiliferous (some Foraminifera) 50 90 Valvulineria jacksonensis at 60-70. Limestone: white, somewhat leached, sandy, fossiliferous (macroshells, echinoid and bryozoan remains) 20 110 Upper Cretaceous: Tuscaloosa Formation: Kaolin: white, micaceous, somewhat sandy 40 150 Sand: fine to coarse-grained, angular; interbedded clay (or kaolin) 180 330 Summary: Upper Eocene (Barnwell formation) Upper Cretaceous (Tuscaloosa formation) 110 110 180 330 Potential Water-Bearing Zones: S,and: fine to coarse-grained 150 330 'Average elevation based on Georgia State Highway Maps. 454 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Location: Southwestern part of county near Danville Owner: No. 1 Danville Elementary School Driller: Virginia Supply and Well Company WILKINSON COUNTY Well No.: GGS 529 Elev.: 4501 Thickness (feet) Depth (feet) Upper Eocene: Jackson Group: Barnwell Formation: Clay: bluish-gray to tan to red (mottled), sandy, limonitic 40 40 Marl: dark-green, silty, sparsely glauconitic 10 50 Marl: light-gray, silty, blocky, glauconitic, fossiliferous (at certain levels macroshells, echinoid and bryozoan remains, and Foraminifera) ; interbedded limestone, light-gray, dense, crystalline ________ 105 155 N onion advena at 50-55. Valvulineria jacksonensis, N onion advena at 80-85. Limestone: light-gray, dense, crystalline, sandier at depth, coarsely but sparsely glauconitic, fossiliferous (casts and molds of megafossils and abundant bryozoan remains)_ 5 160 Middle Eocene: Claiborne Group (Undifferentiated): Sand: fine to coarse-grained, angular, phosphatic at depth; some limestone, as above________ 45 205 Marl: light-gray, silty; some sand, fine to coarse-grained, angular _____ _____________________ _ 30 235 Limestone: light-gray, argillaceous, very sandy 5 240 Clay: dark-green to brown, somewhat indurated and fissile, abundantly glauconitic, carbonaceous, micaceous, pyritifer- ous, fossiliferous (rare Foraminifera) __ _ 20 260 Sand: coarse-grained, angular, phosphatic, somewhat arkosic_ 30 290 Sand: as above; some clay, brown, sandy, lignitic 30 320 Summary: Upper Eocene (Barnwell formation) _______ Middle Eocene (Claiborne group, undifferentiated) __ 160 160 160 320 Sand: coarse-grained Potential Water-Bearing Zones: 30 290 1Average elevation based on Georgia State Highway Maps. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 455 Location: Approximately 3.25 mi. southeast of Oakfield, 0.1 mi. north of a grain mill at tenant house Owner: No.1 Will Aultman Driller: H. B. Truluck Drilled: July 1951 WORTH COUNTY Well No.: GGS 232 Elev.: 250 Thickness Depth (feet) (feet) Residuum: Clay: dark-brown to black, sandy, lignitic, and residual lime- stone ____ ___________ --------------------------------- ----------------- 40 40 No samples_ 10 50 In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, calcitized, fossiliferous (macroshells, abun- dant bryozoan remains, and some Foraminifera) __________________ 30 80 Operculinoides sp. at 50-60. Argyrotheca sp. at 70-80. Summary: Residuum ______________ __________________ ____________________________ ___________________ 40 40 No samples ______________________________________ ---------------------------------------------In upper Eocene (Ocala limestone) _______________ ________________________ 10 50 30 80 Limestone __ _ Potential Water-Beari:hg Zones: 30 80 Location: Doerun Owner: No. 1 Minton Elementary School Driller: Pierson Well Drilling Company Drilled: 1955 WORTH COUNTY Well No.: GGS 456 Elev.: 410 Thickness Depth (feet) (feet) Miocene (Undifferentiated): Clay: mottled, sandy, limonitic________________________________________________ 50 50 Clay: yellowish-green, sandy____________________________________________________________ 10 60 Sand: fine to coarse-grained, angular______________________________________________ 10 70 456 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) Clay: yellowish-green, sandy; interbedded limestone, white, dense, calcitized, sandy___________________________________ 210 Depth (feet) 280 Limestone prominent at 160-170. In Oligocene (Undifferentiated): Limestone: white, somewhat sandy, fossiliferous Rotalia mexicana var. at 280-290. Pyrgo sp. at 290-300. 20 300 Summary: Miocene (undifferentiated) In Oligocene (undifferentiated) ______ 280 280 20 300 Potential Water-Bearing Zones: Limestone ___________________ ------------------------------------- 20 300 Samples of poor quality. Remarks: Location: 0.25 mi. west of town of Red Rock Owner: No. 1 Red Rock Elementary School Driller: W. H. Pierson Drilling Company Drilled: 1955 WORTH COUNTY Well No.: GGS 471 Elev.: 330 Thickness Depth (feet) (feet) Residuum: Clay: mottled, sandy, limonitic_ 10 10 Clay: olive-green to red (somewhat mottled), carbonaceous, sandy, and fragments of chert 10 20 Clay: as above, with residual limestone _ 40 60 No samples _______ 30 90 WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 457 In Upper Eocene: Jackson Group: Ocala Limestone: Th iekness (feet) Limestone: white, dense, crystalline, highly calcitized, fossiliferous at certain levels (macroshells, bryozoan remains, and some Foraminifera) -------------------------------------------------------------------------- 155 Robulus alato-limbatus, Siphonina jacksonensis, Eponides jacksonensis, Gypsina globula at 90-100. Lepidocyclina sp. at 110-120. Gypsina globula common at 125-130. Limestone: as above, but coarsely glauconitic____ ----------------------------- 15 Operculina mariannensis at 255-260. Limestone: white, dense, sandy, fossiliferous (macroshells and Foraminifera) ----------------------------------------- ---------------------------------- 40 Amphistegina pinarensis var. at 285-290. Sand: fine to medium-grained, angular_ 15 Depth (feet) 245 260 300 315 Summary: Residuum ___________ ------------------------------------------------------- 60 60 No samples _________ --------------------------------------------------------------------------------------- 30 90 In upper Eocene (Ocala limestone)_ 225 315 Potential Water-Bearing Zones: Limestone ______________________ -------------------------- __________________ Sand: fine to medium-grained __ 210 300 15 315 BEAUFORT COUNTY, S.C. Location: Approximately 0.25 mi. west of Well Well No.: GGS 385 66, Hilton Island Elev. : 15 Owner: No.2 USGS Test Hole (Observation Well) Driller: M. M. Gray Drilling Company Drilled: June 1954 Thickness (feet) Depth (feet) Pliocene to Recent (Undifferentiated): Sand: fine-grained, finely disseminated phosphatic grains; interbedded clay, dark-gray, silty, somewhat indurated, carbonaceous, micaceous, fossiliferous (macroshells at cer- tain horizons) ___ ______________ --------------------------------------- 20 20 458 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Miocene (Undifferentiated): Thickness (feet) Clay: dark-green, sandy, phosphatic_ 35 Sand: coarse-grained, angular; some clay, as above_ 10 Limestone: white to light-gray, very sandy, phosphatic, fos- siliferous at depth (fragments, casts and molds of megafos- sils, echinoid and bryozoan remains, Ostracods, and some Foraminifera) ________________ _ 55 Textularia? sp. at 100-105. Clay: dark-green, very sandy, phosphatic. 10 Sand: medium-grained, phosphatic_ 5 Depth (feet) 55 65 120 130 135 Oligocene (Undifferentiated): Limestone: light-gray, dense, nodular, much calcitized, fossil- iferous (bryozoan remains and some Foraminifera)_ 5 140 Limestone: cream, softer, somewhat nodular, fossiliferous (casts and molds of megafossils, bryozoan and echinoid re- mains, and some Foraminifera)__ _ ____ ___ ____ 40 180 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, much calcitized and crystalline, fossilifer- ous (abundant bryozoan remains and some Foraminifera)_ 115 295 Pseudophragmina flintensis at 205-210. Limestone: cream, much calcitized and granular, somewhat loosely consolidated, sparsely glauconitic, fossiliferous at certain levels (bryozoan remains and Foraminifera) 250 545 Camerina striatoreticulata at 365-375. Middle Eocene: Claioorne Group: Lisbon Formation: Limestone: as above but more massive and crystalline at cer- tain levels, somewhat sandy, fossiliferous (Foraminifera at certain levels) 185 730 Lepidocyclina sp. at 555-565. Marl: light-gray to cream, fossiliferous (echinoid and bryo- zoan remains, Ostracods, and abundant Foraminifera) 10 740 Spiroplectammina mississippiensis var., Textularia adalta, Textularia dibollensis var. humblei, Robulus alato-limbatus, Dentalina jacksonensis, Nonion planatus, Nonionella hantkeni var. spissa, Siphonina jacksonensis, Marginulina cocoaensis, Gyroidina soldanii var., Discorbis assulata, Lagena WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 459 Thickness (feet) acuticusta, Planularia sp., Spirillina vicksburgensis, Patellina advena, Guttulina problema, Globulina gibba, Polymorphina aclvena var., Sigmomorphina semitecta, Bolivina jacksonensis var., A ngulogerina vicksburgensis, Buliminella robertsi, Oibicides lobatulus, Cibicides danvillensis, Cibicides pseudoungerianus var., Cibicides mississippiensis, Cibicides americanus var. antiquus, Cibicides westi at 730-740. Depth (feet) Summary: Pliocene to Recent (undifferentiated)_ Miocene (undifferentiated) Oligocene (undifferentiated) _ Upper Eocene (Ocala limestone) Middle Eocene (Lisbon formation) _________ 20 20 115 135 45 180 365 545 195 740 Potential Water-Bearing Zones: Sand: medium-grained _ Limestone 5 135 595 730 Location: Daufuskie Island Owner: No.3 USGS Test Hole Driller: M. M. Gray Well Drilling Company Drilled: 1958 BEAUFORT COUNTY, S.C. Well No.: GGS 566 Elev.: 20 Thickness Depth (feet) (feet) No samples __ 42 42 In Miocene (Undifferentiated): Sand: fine to medium-grained, subangular, sparsely phos- phatic; interbedded clay, dark-gray to dark-green, somewhat indurated, blocky, silty, micaceous, carbonaceous, fossilifer- ous (macroshells at certain levels) __ 41 83 Sand: medium-grained, subrounded, phosphatic 3 86 Clay: yellowish-green, blocky, tough, sandy 10 96 Oligocene (Undifferentiated): Limestone: light-gray, massive, saccharoidal, very porous1, sandy, sparsely phosphatic, fossiliferous, carrying casts and molds of megafossils 10 106 1Cavities represent former megafossils subsequently dissolved by ground water. 460 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Thickness (feet) No samples __________________ ---------------------------------------------------------------------------- 11 Limestone: cream, nodular, saccharoidal, somewhat soft and powdery at certain horizons, very sandy, sparsely phos- phatic, fossiliferous (casts and molds of megafossils, echi- noid and bryozoan remains, and some Foraminifera) ____ 18 Rotalia mexicana var., Pyrgo sp., Quinqueloculina sp., Dictyoconus2 sp. at 117-122. Limestone: cream to light-gray, massive, somewhat calcitized and nodular, fossiliferous (as above) __ -------------------------------- 55 Operculinoides sp. at 135-140. Depth (feet) 117 135 190 Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, somewhat crystalline and calcitized, fossil- iferous (some macroshells, abundant bryozoan remains, some Ostracods, Foraminifera) ---------------------------------------------------------------- 70 260 Gypsina globula, Eponides cocoaensis, Eponides jacksonensis, Discorbis assulata, Nonion planatus, Cancris sp., Planularia sp., Siphonina jacksonensis, Globorotalia cocoaensis, Guttulina irregularis, Cibicides americanus, Cibicides mississippiensis at 190-196. Operculinoides floridensis, Asterocyclina nassauensis at 196-200. Lingulina sp. at 200-205. Limestone: light-gray, rather massive, much calcitized and crystalline, somewhat nodular, fossiliferous (as above)_ 45 305 Limestone: cream, much calcitized and granular, somewhat loosely consolidated, fossiliferous (Foraminifera at certain levels) ____ ----------------------------------- ___ ___ ______ ____ _ _____ _______ ________ 255 560 Orthophragmina flintensis at 345-350. Camerina st1iatoreticulata common at 426-431. Middle Eocene: Claiborne Group: Lisbon Formation: Limestone: as above, but more massive and calcitized, some- what sandy, fossiliferous at certain levels (megafossils, bryozoan remains, and Foraminifera) _______________________ 140 700 Lepidocyclina sp., Operculinoides sp. at 645-650. Limestone: white, massive, much calcitized, somewhat granu- lar (in texture), coarsely glauconitic, sparsely fossiliferous (macroshells at certain levels) ---------------------------------------- 5 705 Marl: yellowish-green; interbedded limestone, as above _______________ 41 746 2Reworked ( 7) fossH of Eocene age. WELL LOGS OF THE COASTAL PLAIN OF GEORGIA 461 Summary: No samples ____ _______________ _ In Miocene (undifferentiated) ______________ Oligocene (undifferentiated) ___ Upper Eocene (Ocala limestone) Middle Eocene (Lisbon formation)_ Thickness (feet) Depth (feet) 42 42 54 96 94 190 370 560 186 746 Limestone Potential Water-Bearing Zones: 395 530 Remarks: The interval 530-700 may represent late middle Eocene, i.e., Gosport equivalent. At 645-650 a species of Lepidocyclina was identified as possibly Lepid. ariana, a middle Eocene Lepidocycline. However, more specimens are needed before a definite specific identification of this species may be made. References Applin, P. L., 1951, Preliminary report on buried pre-Mesozoic rocks in Florida and adjacent States: U.S. Geol. Survey Circ. 91, 28 p. Applin, P. L., and Applin, E. R., 1944, Regional subsurface stratigraphy and structure of Florida and southern Georgia: Am. Assoc. Petroleum Geologists Bull., v. 28, no. 12, p. 1673-1753. 1947, Regional subsurface stratigraphy, structure, and correlation of middle and early Upper Cretaceous rocks in Alabama, Georgia, and north Florida: U.S. Geol. Survey Oil and Gas Inv. Prelim. Chart 26. Cole, W. S., and Herrick, S. M., 1953, Two species of larger Foraminifera from Paleocene beds in Georgia: Bull. Am. Paleontology, v. 35, no. 148, 16 p., 2 pl. Cooke, C. W., 1943, Geology of the Coastal Plain of Georgia: U.S. Geol. Survey Bull. 941, 121 p. Eargle, D. H., 1955, Stratigraphy of the outcropping Cretaceous rocks of Georgia: U.S. Geol. Survey Bull. 1014, 101 p. LaMoreaux, P. E., 1946, Geology of the Coastal Plain of east-central Georgia: Georgia Geol. Survey Bull. 50, pt. 1, 26 p. 1946, Geology and ground-water resources of the Coastal Plain of east-central Georgia: Georgia Geol. Survey Bull. 52, 173 p. LeGrand, H. E., Furcron, A. S., and others, 1956, Geology and ground-water resources of central-east Georgia: Ga. Geol. Survey Bull. 64, 174 p. Richards, H. G., 1945, Subsurface stratigraphy of Atlantic Coastal Plain between New Jersey and Georgia: Am. Assoc. Petroleum Geologists Bull., v. 29, no. 7, 70 p. 462 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Stephenson, L. W., and Veatch, J. 0., 1915, Underground waters of the Coastal Plain of Georgia: U.S. Geol. Survey Water-Supply Paper 341, 539 p. Veatch, J. 0., and Stephenson, L. W., 1911, Preliminary report on the geology of the Coastal Plain of Georgia: Georgia Geol. Survey Bull. 26, 466 p. Warren, M.A., 1944, Artesian Water in southeastern Georgia with special reference to the coastal area: Georgia Geol. 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R0 0 4~797 ' \ L 15 86 ~I L- '\0 K r.t~~~ 47 . 798 182 --1\ W412 N D E s ) ~- ~2O7ij4 J,.--~v G L I I __,_ ---l I J ;?? \r 189 ' \ N G 4 ...: H \ I 'II I I I G H A R LT 0 N I I L ,: -lL-------, 146#~ 4~5 A M 31 " oo ',1._ 1 e ( e 356 -.. l ) -- --- --- i __ , ; ------ ----- -L _____ J ~ - \ - -- ~ _1,_'=---- - j Ec 1~9 -?--- - H o' -c--s- -- --- ---- -LI J r I ~ / ) ;' ( \ _J, \ - - -.J. - - - - l I I IEO===EoE;;;;===;;;;'co====21:;0===~30 M11e~ EXPLANATION ...Oil Test Def init e locat i on N \ 1 I I I l I \ ~ '-~ - ""' Wa ter We ll a5oo Def init e l ocat ion 83"00' 0 Indef inite I ocot ion Figure I.-Well location map, Coasta \ Plain of Georgia