DETAILED RECORDS. 263 
SOUTH CAROLINA. 
1420. Well at Aiken, Aiken Comity. 
[Well begun and completed in 1905. Authority, Perry Andrews, contractor and driller. Samples 
preserved to 500 feet. Log compiled from samples by S. Sanford. Geologic correlations by W. B. 
Clark.] 
Aiken is near the western edge of the Atlantic Coastal Plain, and the Coastal Plain 
deposits are consequently comparatively thin there. This well goes through them and 
into the underlying granite or gneiss. The sedimentary beds penetrated belong to the 
Lafayette (Pliocene) and Potomac (early Cretaceous) formations. 
Record of well of Carolina Light and Power Company at Aiken. 
Lafayette: Feet. 
Bright-red clayey sand - - 20 
Pale-red clayey sand 40 
Potomac: 
Fine buff sand and clay, not sticky 60 
Yellow and buff clayey sand 80 
Pure-white clay, kaolin 100 
Light-buff clay and sand. . . 120 
Coarse sand with brownish or yellowish clay 140-280 
Brownish arkosic sandstone. 300 
Pure-white and light-purple clay 320-380 
Coarse sand cemented by iron oxide 400 
White to brownish arkosic sand and gravel 420 
Sand and gravel with brownish clay 440 
Algonkian (?): 
Coarse granite or gneiss. 460-560 
Ptig used, cable. Depth of well, 1,000 feet. No water of moment found; maximum 
yield of well, 25 gallons per hour. 
1425. AY r ell near Otranto, Barn-well County. 
[Well begun August G, 1905; completed in 1905. Authority, Hughes Specialty Well Drilling Company, 
contractor. Incomplete series of samples preserved. Geologic correlations by W. B. Clark.] 
The. formations penetrated by this well below 20 feet are of Eocene (Tertiary) and late 
Cretaceous age. 
Record of well 2 miles north of Otranto. 
Eocene: Feet. 
Tough light marl (gray limy clay or soft clayey limestone) 20 -140 
Phosphate rock (hard black and gray nodules, may be phosphatic) 140 -142 
Shell rock (white to brownish limestone with chert and possibly apatite). . . 142 -290 
Eocene or Cretaceous ( ?) : 
Gray sand 290 -300 
Rock (gray, more or less silicified limestone with sand) 300 -310 
Medium-fine gray sand 310 -317 
Hard rock (gray, more or less silicified limestone, containing dark nodules). 317 -327 
Shell rock (limestone like preceding with dark shaly layers) 327 -337 
Cretaceous: 
Dark tough marl (limy clay and sand with glauconite) 337 -380 
Tough dark sandy marl (olive-gray sand and clay, containing a few bits of 
fossil shells) 380 -400 
Tough dark marl (no sample) . 400 -498J 
Hard rock (no sample) 498i-£00 
Tough dark marl (no sample) .500 -600 
