WELl. LOGS OF THE COASTAL PLAIN OF GEORGIA

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1 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

2 258 G EORGIA GEOLOGICAL SURVEY BULLETIN 70 Oligocene (Undifferentiated):..' I. Thickness (feet) Dept h (feet) Limestone: as above; with fragments of limestone, white, dense (m uch calcitized), f ossiliferous ' (ca sts of megafossils and Foramini fe r a ) R otalia?nexicana var. at No samples ~ In Upper Eocene: Jackson Group: Ocala Limestone: Limestone: white, rather.m assive, much calcitized, fossiliferous (bryozoan r emain s, macroshells and F oraminifera ) Oper culinoides [ioridens is, A s ter o~ clina sp, a t A sterocyclina nassaue?!sis, Gypsina globu la, Peeudophraq-?nina j lintensis at Summary: Pliocene t o Recent (undifferentiated )...._ In Miocene- (un different iated) _.._ Oligocene (undifferentiated) _' No sa mples _......: In upper Eocen e (Ocala limest one) Potential' Water-Bearing Zones: Limestone 210, 650 Location : Long 81"20'4 5" W., Lat 31 41' 15" N. Owner: No.1 Jelks-R oger s Driller : E. B. LaRue Drilled: 1953,. Pliocene to Recent ( Undifferentiated): Sand: fine to medium- grained, angular, finely di sseminated black ' pho sphatic grains ; interbedded clay, dark-gray, silty, mi caceous... _... _. Sand: coars e-g rained, subangula r, arkosic Miocene (Undifferentiated):..(.' LIBERTY COUNTY Well No.: GGS 363 'Elev.': 26 ' (derr ick floor ) Thickness (fe et) ' Dep th ({;'e.t) Clay: dark-green, sandy, phosphatic.. :;-...._ Claystone, dark-brown, den se, sa ndy, micaceous, prominent at

3 W ELL LOGS OF THE COASTAL PLAIN OF GEORGIA 259 'I'htckneaa Dept h (feet) (feet ) Dolom itic limesto ne : light-brown, sacc haro idal; sandy, phosphat ic..._ :..._ : Clay : dark-green, sandy, pho sphatic..._...: Li mestone : wh ite, massive, sa ndy, ph osphatic, f ossiliferous (fragments, casts and mold s of megafossils)...._ Oligocene (Undifferentiated); Limestone: light-g ray, somewhat chalky (weathered?), nodular, calcit ized, f oss ilif erous' (bryozoan r emains and Fora-. minifera) :.,... ~, Rotalia tnexicana val'. a t Asterocyclina 1, sp., GYP8ina globula 1 at Upper Eocene: Jackson Group: Ocala Limestone: Limestone: cream, rather ma ssive, nodular' (calciti zed), fo s silife r ous (m acroshells, echinoid and bryozoan remains, and some Foraminifera) ' 800 Op enj'ulinoide8 cf. O. [lorideneis at Gyp sina glo ~1l la at Asterocyclina nassauensis at Pseudophra;gmin(L flintensis at , Camerina striatoretic1tlata at A mphis tegin a Pinarensis val'. at L epidocuciin a. (Polylepi~ina) aniilleti" at Limestone : as a bove, but granular, loosely consolidated 240 1,040 (, Middle Eocene: Claiborne Group:/Lisbon Formation:,, Limestone : white, massive, somewhat, nodular : (calcitized), coa rsely but spars ely glauconitic, f ossiliferous ' (macroshells; echinoi d and bryozoan remains and Foraminifera).._.. Asterocyclina m onticellen sis at Dlscorbis inornatus at Limestone : as a bove; and dolom itic lim estone, g ray to light-, brown, saccharoidal, spars ely glauconitic, gypsiferous--; 220 Limestone: cream, granular, loosely consolidated, cherty...._ Chert abundant at Q 1 1,080 1,300 1,435 ' Rew or ked { 1) fossil 'of m i ddl e Eocene a ge.

4 ., GEORGIA GEOLOGICAL SURVEY BULLETIN 70, o' Ta1JahattaFormaiio~: "f; Thick nes s (fe et ) Dept h (f eet) 'Mar l : brownish-green, somewhat indurated, silt y, glauconit ic,.;' micaceous, pyritiferous, fo'ssilife r ous (Foramini fe ra ), 70 1,505 Cyclammina sp., Robulue alato-lim batus"marginulina' v acavillensis, Gur oidima soldanii var., Reussella su brotundata" Vo lnrulineria [ackeonensie var., Cibicides pippen i var., Cibi. cides blampiedi at " 00 ' '. ' ~. J:. Lower Eocene: Wilcox: Group (Undifferentiated): Limestone: light-brown, argillaceous, somewhat granular and loosely consolidated, glauc onit ic, mi caceous, cherty, at dep th..., 175 1,680, f Ro bulus sp., E ponide s cf. E. dorfi at Indurated sand : ltght-gray.: medium-grained, ~ coa rsely but ",.'J ij abundantly glauconitic; g rades downward into limestone, cream t o light-gray; m uch "calcitized, r ather den se, finely glaucon itic (a 'pepper and sal t appearance), cher t y at cer-,. " tain levels....,_ l_.. '160..." 1,840 Paleocene: Midway Group: Clayton Formation: Marl: dark-gray, somewhat indurated and"t ough, silty, coarsely glauconi tic, mica ceous, fo ss ilife ro u s (F oraminifera ); in terbedded indur ated sand, light-gray, f ine-grained, micaceous, fo ssili~erou s (Foraminifera), c_: ".. S piroplectammina wilc~~e'n 8is..\N o dosaria aifinis, P olumorphina cf. P. cushmani" Guembetina sp., Anomatina acuta at i R obulus midwayensis at ,:::'IJ o;). :': 14o 1,,1 Limestone: Iight-gray., rather, d en se, cr ystalli ne, san dy,, coarsely gl aucoij.itic,,fossilifer6tis (Foraminifera) Vaginulina longiform:a a t ~ c_::....,j ".... &,' '..,.... :..,;",, ko b u l;~ p8 eudj,:ma. ~illig eru8, 'Robu lus af: R. turbiri:attt's at '. " H i ' 60 1, ".",,., ih" a : I Limestone: gray; ' ~andy, glauconi tic : i ri terb ~d d~d marl, gray,..'. " ',glau conit ic, fo ssiliferous' (Fcraniinifera).. ~:~ :...:.'. -:... '.'155 ' 2,095 'Robul~ ;midwayensis at i960~19'80. Limestone (or calca reous sandstone) : gray, sandy.._~...._ 185 2,280 0 "

5 WELL LOGS OF THE COASTAL PLAI N OF GEORGIA 261 Upper Cr etaceous : Post-Euta w (Undiffere ntiated) :, t "? T h i ckne ~ s Dentb ( feet) ( f eet).marl : gray to brown at depth, carbonaceous, somew hat fissile at depth, chalky, silty, mu ch sandier at depth, micaceous,, glauconitic, pyi-itifer ous,._.;.._ ,190 3,470 Guembelitui sp, at Planulina ta y[ore'nsis at 2' Kyphopyxa christneri at Vaginulina texana at Eutaw Formation (Restricted): Sand : fine to med ium-grained, somewhat indurated, phos- " phatic, fossiliferous (macroshellsj ; 'inter bedded clay, gray, micaceous, carbonaceous, somewhat fissile.c,... ~. ~... ~ _. :....,......" ,6i5 Tuscaloosa Formation:,, ', '1" Sand : fine t o ' coa rse-grained, angular, arkosic ; jnterbedded 'clay, yellowish-green 't o red to purple (mottl ed ), sandy, micaceo us _ ". _.., l:.-''to. Clay (or shale) : dar k-gray to black, f iss ile, carbonaceous, micaceous.(finely di s seminate~); interbedded sanf' :fi ne' to coarse-grained, angular, arkosic _ ~~..:._..:.. Indurated sa nd: fine to coarse-grained, glauconitic.:._. Sand': f ine to coar se-gr ained, angular, arkosic; interbedded clay, yellow ish-green to r ed to purple, greasy, sandy, micaceous.. _.. _.. ~. :._' ~~ ~ :~: ~ '"' - Base ment Comp lex ( Un diff erentiat edj e,! ,870 l 95 3, , , 4,250 Crystal!ine Rock. ~, _, _..:,_.. 4 4,254 Summ ary :... Pliocene to Recent (undifferentiated) _:._ :. :...:..:.:.:. ;...c.l Miocene (undifferentiated). _~ ' Oligocene (undifferentiated) ,-~ _ ,. Upper Eocene (Ocala limestone)...,...,..,.,. 575 " Middle Eocene (Lisbon formation) ~._ :.. :, ~_ 395 Middle Eocene (Tallahatta formation) r Lower Eocene (Wilcox group, undifferentiated) _ :-_~, 335 Paleocene (Clayton f ormation). :...:.... '._.,~.:. : 440 Upp er Cretaceous, (po st-eutaw, undifferentiated).._ ,~90. Upper Cretaceous (Eutaw 'for mation, restricted) _. ~ 145 Upper Cretaceous (Tuscaloosa formation) _....:.._ 635 Basement complex (undifferentiated) i,040 1,435. 1,505 1,840 "2,280 3,470 3,615 4,250 4,254

6 262 GEORGIA GEOLOGICAL SURVEY BULLETIN 70 Limestone '\. Overall quality of cuttings poor.... Potential Water-Bearing' Zones: Remarks: Thick ness D epth (feet) (fee t) 705 1,080 LIBERTY COUNTY Location: Taylors Creek, Camp Stewart Owner: U.S. Government (War Department) Driller: M. M. Gray Drilling Company Drilled: 1955 / Well No. : GGS Elev.: 50 Thicknes s Depth (feet) (f ee t ) Pliocene to Recent (Undifferentiated): Sand: f ine-grained, limonitic; interbe dded, cla y, bluish-gray, to t an to red (mottled), sa ndy......,....._ Sand: coarse-grained, rounded, arkosic; clay, dark-green, sandy, micaceous. _ ~~...._ _ j i ) In Miocene (Undifferentiatedj ; Clay : dark-gr een, sandy, m icaceous Clay: as above ; interbedded limestone, Iight-grny, saecha- ' r oida l (much calcit ized), sandy, ph osphatic.._......_ Clay: bluish- gray, indurated, sandy, cherty ; in terbedded Iimestone, light-gray, saccharoida l ( much cal citized), sa ndy, pho sphatic, f ossiliferous (casts and impression s of megafossiis)... :: ".. ~ _ Limestone : gray to light-brown, saccharoidal (much ca lci '. ti zed ), 'sandy, phosphat ic, dolomitized at certain levels,. f oss ilif erous (fragments and ca st s 'of megafossils) Oligocene (Undifferentiated): Limestone: cream, massive, nodular (much calcit ized), fo s- silifer ous (Foraminifera)...: Quinqueloeulina sp., Rotalia m exicana var, at

WELl. LOGS OF THE COASTAL PLAIN OF GEORGIA

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.