134 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull. 138. 
Wilmington and Baltimore Eailroad Company, and I have received 
samples of the borings through the courtesy of Mr. E. T. Brooks, 
superintendent. They are as follows: 
Feet. 
114 sand, light brownish-gray, fine. 
120 clay, buff and yellow, mottled. 
135 clay, buff, with white streakings. 
140 clay, light huffish gray. 
165 sandy clay, pink and buff' variegated and ocher-yellow. 
202 sand, fine, loose, buff-gray. 
215 clay, bright pink, with white streakings, and layer of brown 
sandstone. ' 
233 sand, fine gray, with few buff grains. 
265 sand, pink-brown, moderately fine. 
280 sand, light gray-brown. 
300 clay, rich brown-pink tint. 
314 clay, light pinkish-buff. 
333 saud, coarse gray, with some pink and yellow grains. 
335-345 sandstone, red-brown, with fragment of lignite. 
345-355 sand, very fine, light reddish-brown. 
355-384 sand, very fine, buff, containing a large pebble of quartz. 
This boring is in the Potomac formation, and probably to within 
about 150 to 200 feet from the basal beds, where it is expected that 
abundant water will be found. 
Marlboro, Prince George County. — The Marlboro well has a depth of 
222 feet, and yields a flow of excellent water, apparently from the 
Magothy formation. The water is stated to rise 13 feet above the sur- 
face, which is elevated about 30 feet above tide-water level. At a 
depth 3 feet below the surface the well supplies 25 gallons per minute. 
The following record is based upon statements aod samples furnished 
by Mr. E. A. Baker, the well driller : 
Feet. 
0-185 green sand marl with Pamunkey fossils. 
185-190 hard rock strata. 
190-215 gray micaceous clays, with Severn fossils at a depth not pre- 
cisely indicated. 
215-222 white, water-bearing sand, with fragments of lignite and silici- 
fied coarse sand. 
Indian Head. — At the naval proving grounds a well was sunk which 
yields a moderate but satisfactory water supply. It is near the 
Potomac Eiver, at an altitude of about 100 feet above low-water level. 
Its depth is 463J feet, and is cased with 459.1 feet of 6-inch iron pipe. 
The water rises to about 10 feet above low-tide level, and has to be 
pumped to the surface of the terrace. Its yield is 11.68 gallons per 
minute. These facts and the following record and analysis were fur- 
nished by the Bureau of Ordnance, Department of the Navy: 
Feet. 
0-15 soil, with light sand. 
15-18 cobblestone and clay. 
18-22 red clay and gravel. 
22-27 sand and gravel. 
