darton.] DELAWARE. 121 
Farnhurst, Newcastle County. — This well draws its waters from coarse 
gravel and sand at a depth of 165 feet, but additional supplies are also 
obtained at 55 to 63 feet and at 40 feet. The following partial record 
was furnished : 
Feet. 
85 yellow clay. 
95 mottled red clay. 
99 thin bed of ironstone with some gravel below. 
99-140 red clay. 
165 coarse sand with pebbles up to one-half inch in diameter. 
211 bed rock. 
The boring was entirely in the Potomac formation, and the water at 
165 feet is in the basal member. 
Dover. 1 — A 12-inch well for the Dover waterworks was bored in 1893 
to a depth of 196 feet. The water rises to about 12 feet above tide 
level, or 6 feet above the surface, and the natural flow is 35J gallons a 
minute; 218 gallons per minute have been pumped from it. A 4-inch 
well previously bored found water at 157 feet, but this horizon was cased 
off in the later well. The two horizons are thought by Mr. Wool man 
to represent the 720-foot and 760-foot horizons at Atlantic City, and it 
is predicted that the 60-foot bed of coarse, water-bearing sands of the 
800-foot horizon at Atlantic City and Ocean City would be found at 
Dover at about 50 to 75 feet below the bottom of the 196-foot well, but 
from the structural evidence presented in section 1, PI. VI, a higher 
horizon is indicated. 
The record of the Dover well is as follows : 
Feet. 
0-7 yellow gravel. 
11 deep orange-colored sand and clay. 
26 medium orange-colored sand ; coarse. 
42 light orange-colored sand ; finer. 
54 sandy clay, with a few marine diatoms. 
62 sand and marly clay. 
71 sand. 
83 brownish clay and sand, with marine diatoms. 
90 sand and comminuted shell, with marine diatoms and sponge 
spicules. 
94 sand. 
100 sand and broken shell. 
109 "marl." 
117 micaceous marly sand ; some reddish sand grains. 
120 sand, with bad water; comminuted shells, diatoms, and coci j- 
liths. 
128 sandy clay, with diatoms. 
147 clay, with diatoms. 
150 sand, shell, and diatoms. 
155 clay, with a few diatoms. 
157 sand, with good water. 
157-167 clay, with pyrite-covered diatoms. 
167-196 dark sand, some grains large as peas; good water. 
1 Report of geologist of New Jersey for 1893, pp. 402-403, 
