200 RECORD OF DEEP-WELL DRILLING FOR 1905. 
255. Well at Lela, Decatur County. 
[Well begun September 11, 1905; completed December 1, 1905. Authority, Hughes Specialty Wei 
Drilling Oompany, contractor. Samples preserved. Geologic correlations by W. B. Clark. 
The white (kaolinic) and red and buff clays first penetrated may represent the weatherei 
surface of tlfls underlying limestones or may belong to the Columbia and Lafayette forma 
tions. The formations below are of Tertiary age. The limestone is probably part of the 
Vicksburg-Jackson group and may be Oligocene or Eocene. The underlying sands, with 
beds of rock, in part at least, represent the Claiborne and lower Eocene formations. 
Record of well No. 3 at sawmill, Lela. 
Feet. 
Soft white clay with red streaks; coarse white sand and fine gravel 1-20 
Soft gray and buff sandy clay; soft water in large supply . 20- 40 
Soft creamy-white sandy limestone : 40-140 
Soft brownish limy sandstone < 140-160 
Soft light-brown sandy limestone 160-180 
Soft light-gray limestone, conl aining dark-green grains 180-200 
Soft white to light-buff sandy limestone 200-220 
Soft greenish marl • 220-240 
Hard white to grayish-brown sandy limestone 240-260 
Soft white marl; may contain glauconite 260-320 
Fine gray sand; contains glauconite and bits of shells; some water 320-380 
Hard light-brown sandy limestone 380-400 
Medium to fine light-gray sand; contains glauconite and bits of shells; has hard 
layers ' 400-460 
Same sand with very lit t le glauconite 460-520 
Fine to medium gray sand containing layers of rock (probably white limestone) 
and very few grains of glauconite 520-580 
Same sand and rock with more glauconite 580-720 
Soft dark marl (no sample) 700-918 
Rig used, hydraulic. Diameter of well, 6 and 2 inches. Casing used, 600 feet of 3-inch. 
Main supply of water from 737 feet. Water rises within 10 feet of surface. Yield, about 
15 gallons per minute. 
256. Well at Fort McPherson, Fulton County. 
[Well begun December 13, 1904; completed April 24, 1905. Authority, Capt. B. Buck, constructing 
quartermaster. Samples preserved.] 
This well is noteworthy, since it is sunk in the crystalline rocks of the Piedmont plateau, 
and the water obtained comes from joints, cracks, and like openings, no true water-bearing 
formations being penetrated. 
Record of well at Fort McPherson. 
Feet. 
Soil, clay and stones 0- 42 
Hard light schistose crystalline rock 42 
Very hard dark schistose crystalline rock -. 50 55 
Hard light schistose crystalline rock; little water at 75 feet, enough for drilling.. 55-100 
Hard dark schistose crystalline rock, with water-bearing crevices at 130 and 145 
feet ■ 130-14£ 
Softer dark schistose crystalline rock, with water-bearing crevices at 165 feet; 
yield at 178 feet, 18.5 gallons per minute of clear, soft water 165-18' 
Hard dark schistose crystalline rock 205-22J 
Softer and lighter schistose crystalline rock 245-28/ 
Hard dark schistose rock 30/ 
Hard light schistose crystalline rock; small crevices in very hard rock at 365 feet. 32.5-36. j 
Very hard light schistose crystalline rock; increase in water from 365 to 385 feet. 385-441 j 
Ei^ used, standard. Depth of well, 452 feet. Diameter of well, 10 inches. Length c I 
casing, 42 feet. Well pumps 45.6 gallons per minute. Water rises within 30 feet of surfact 
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