dabton.] SOUTH CAROLINA. 219 
Water was found also at 608 feet, just above the sandstone, and at 
about 800 feet, in the sandstone, but as deep waters were desired these 
were not tested. The 000-foot water is probably in the basal beds of 
the Potomac formation. At the ice works in Florence there is a well 
which draws a supply of excellent water from beds at a depth of from 
199 to 224 feet, and at the machine shops there was formerly a small 
tube which found a good supply at 420 feet below the surface. This 
latter water is probably in the Potomac formation. 
Marion. — The boring made at this place several years ago may be 
regarded as unsuccessful, for it supplies less than a gallon a minute. 
The depth is 1/244 feet, of which the portion below 700 feet is in crys- 
talline rocks. A small flow of water was found at 700 feet, at the base 
of the Coastal Plain formations. It rose 12 to 15 feet above the surface, 
but was not fully tested as to pressure and yield, as larger supplies 
were expected at greater depths. Very little information is available 
regarding the record of this boring,, and the only definite feature of 
geologic significance of which I could learn, in addition to the facts 
above presented, is the occurrence of alternating strata of sand and 
tough clay with occasional rocky layers from 400 to 500 feet. This 
series probably represents a portion of the Potomac formation, which 
here lies between the superficial marine Cretaceous marls and the crys- 
talline rocks, probably with a thickness of about 500 feet. 
Darlington. — The Darlington well has a depth of 327 feet and fur- 
nishes a large supply of excellent water, which rises just above the 
surface. The water contains iron and magnesia and has a strong odor 
of sulphur, which soon passes away in the open air. 
The following statement regarding the beds penetrated is given from 
memory by Prof. J. J. Ward, of Darlington, who furnished all the infor- 
mation regarding this well: 
Feet. 
0-16..... -clay. 
16-50 alternating sand and clay. 
50-250 fuller's earth, with thin layers of sand and soft black shale. 
250-327 quicksand. 
The upper beds comprise the Lafayette (?), Miocene, and Cretaceous 
marine beds, of which the black shales are characteristic. Probably 
the quicksand and water are in the upper part of the Potomac forma- 
tion. It is stated that the health of Darlington has improved greatly 
since the artesian water was introduced. 
Lalce City, Williamsburg County,— The group of ten wells in this town 
have depths of from 160 to 200 feet, and each yields from 7 to 15 gal- 
lons of water a minute, which rises to 15 feet or more above the sur- 
face. The water is said to be of the very finest character. There are 
about twenty-five wells in the surrounding country. An analysis of 
the Lake City water, made at Clemson College, is as follows: 
