176 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull.138. 
At Sharps Wharf the first rock stratum was reached at a depth 
of 200 feet and was bored through to 235 feet. The black sand, with 
water, was found at 360 feet in another boring at the same place. At 
Windmill Point the rock strata were found at a depth of 430 feet, but 
owing to an accident to the boring tool they were not penetrated and 
the well was not a success. 
Dymer Creek. — The boring at Dymer Oreek is on the wharf. It had 
a depth of 507J feet when first bored, but was finished at 443 feet. 
The following record has been furnished by Mr. L. S. Bell, at Salis- 
bury, Md. : 
Feet. 
0-237 tough blue clay, with a 3-inch sand bed at 170 feet. 
237-239 marl, with shells and gravel. 
239-241 gravel, with a good supply of water, which rises to within 10 1 
feet of the surface. 
241-248 blue clay. 
248-250^ rock stratum underlain by coarse sand mixed with yellow 
and green clay. 
253?-385 clay. 
385-388 rather coarse, dark sand. 
388-435 blue clay. 
435-443 sand, fairly coarse, dark above and white below; 7-gallon 
flow of water. 
443-464 hard rock, very rough, porous texture. 
464-474^ coarse sand, much mixed with clay and mica; 5-gallon flow 
of water. 
476-479 rock stratum, quite hard. 
479-507 £ blue clay and sand. 
This record shows a fair degree of correspondence with the record of 
the Naylors Wharf borings, making due allowance for difference in 
location and verbiage of the recorders. The rocky strata from 443 to 
479 feet, with associated water-bearing sands, are apparently the same 
as those found at 135 to 155 feet at Naylors Wharf, 35 miles distant, 
and at 430 feet in the Windmill Point boring. The thin rock stratum 
at 250 feet and the water at 240 feet in the Dymer Greek well are 
probably local features. 
Lancaster. — This well is on the peninsula between the Potomac and 
Rappahannock rivers, about 8 miles from the bay shore. The well 
was sunk 300 feet, but the water was taken at 250 feet. Its mouth 
was 60 feet above tide water. The record is as follows : 
Feet. 
0-30 bright orange sand, moderately coarse (Lafayette). 
30-75 gray sands, moderately coarse, with shell fragments. 
75-115 white and yellow sand intermixed, moderately fine. 
115-160 gray sand, moderately coarse, some glauconite grains, few 
shells, and thin ferruginous crusts. 
160-180 greenish-gray fine sands, mud, with some mica and many 
shell fragments ; some glauconite. 
180-250 clay, light brownish-gray in color, few sandy streaks, shell 
fragments. 
1250-300 clay, light greenish-gray in color. 
&< 
