DABTON.] 
SOUTH CAROLINA. 
213 
The record of the Charleston well, as prepared for Dr. James Hall 
and published in the report of the well committee, is reproduced in PI. 
XIX on a somewhat smaller scale. Dr. Hall also furnished the com- 
mittee with some notes on the borings, from which the following state- 
ments are compiled : 
Too few fossils were found in the higher beds to indicate precise 
ages and subdivisions, but they were clearly Tertiary down to 430 feet. 
Then there was a gap of 170 feet from which no distinctive fossils 
were obtained. The borings from 600 to 1,955 feet contained char- 
acteristic Cretaceous shells, mainly Exogyra and Gryphsea of several 
species. 
The specimens indicated that from 1,940 to 1,980 feet are of greenish 
clay, without fossils. This last statement in regard to the nature of 
the beds is at variance with the columar section, in which are shown 
alternations of sand and sandstone from 1,825 to 1,970 feet. It seems 
probable that the water horizon is at the base of the marine Cretaceous 
formations, and it is possible that the sands with sandstones are at the 
top of the Potomac formation. Three other wells have since been 
bored to 1,945, 1,950, and 2,000 feet. One, 3J inches in diameter, is 
said to furnish a quarter million gallons a day, and another, 5 inches in 
diameter, is reported to furnish considerably over a million gallons a 
day. The third is, I believe, just finished to a depth of 2,000 feet. 
An attempt was made in 1844 to bore a well at Fort Sumter, but at 
347 feet the rods broke and the boring was abandoned. 
Commercial cotton press, Charleston : This well is half a mile from 
the city hall and its depth is 380 feet. Xo further data are given 
regarding it except the following analysis by C. U. Shepard: 1 
Analysis of water from well at cotton press, Charleston, S. C. 
Grains per 
p-allon. 
Carbonate of lime 
Chlorides of sodium, etc. 
Sulphate of lime 
Sulphate of magnesia 
Silica 
Undetermined 
26.25 
204. 41 
10.61 
13.88 
1.98 
7.35 
Total 
204. 48 
Municipal report of the city of Charleston, S. C, 1881, p. 51. 
