172 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull. 138. 
Feet. 
1,007-1,015 alternate layers of sand and sandstone, 3 to 4 feet thick. 
1,015-1,080 alternate layers of sand and sandstone, 5 to 15 feet thick. 
1,080-1,100 very hard white sand. 
1, 100-1,155 sandstone. 
1,155-1,160 red sandstone. 
1, 160-1, 170 hard sandstone. 
1,170-1,172 hardest kind of stone or granite; here drill rods broke and 
work was abandoned. 
Unfortunately, I was unable to examine any of the borings from the 
well, and from the above notes can not identify the lower strata with 
certainty. The Obesapeake and Pamunkey formations extend to 700 
feet, if not beyond, and the sand and sandstones from 920 to 1,170 feet are 
almost certainly the representatives of the Potomac formation, but the 
position of the upper limit of this formation is not recognized in this, 
well. It is possible that this well penetrated the Potomac formation to 
the underlying granite, and if this is the case the probability of arte- 
sian water supply in the region is not great, for no water will be found 
in the granite. If, on the other hand, the boring stopped in a hard 
sandstone within the Potomac formation, it is probable that water 
would be found in gravels and sands which I should expect to find 
lying on the granites at no great depth below. 
Lamberts Point, near Norfolk. — A well was bored at Lamberts Point 
to supply water for the Norfolk and Western Eailroad terminal. It 
attained a depth of 610 feet, and at 606 feet penetrated a water-bearing 
stratum which yielded 65 gallons per minute. The water was quite 
saline, and the well is regarded as a failure. The officers of the rail- 
road company kindly permitted me to examine some of the borings, 
which are as follows : 
Feet. 
0-17 beach sands ; shell fragments. 
17-44 bluish clay ; shell fragments. 
44-183 gray micaceous sand, fine ; shell fragments. 
183-191 greenish-gray sandy clay. 
191-233 gray micaceous sands. 
233-264 fine sand and clay, greenish gray; tough when dry; shell 
fragments; Pecten, Venus. 
264-286 gray clay. 
286-355 fine gray sand ; shell fragments. 
355-377 gray clay. 
377-397 fine gray sand ; shell fragments. 
397-407 dark-gray clay. 
407-526 gray sand, moderately coarse ; some glauconite. 
526-534 small gravel ; shell fragments. 
534-540 rock (no sample). 
540-563 gray clay. 
563-564 rock stratum ; shell fragments. 
564-568 gray clay. 
568-603 rocky strata with thin layers of clay and shell fragments. 
603-606 small gravel in gray sand ; shell fragments. Water. 
606-610 rocky stratum. 
610-616 gray sand, moderately coarse ; micaceous ; oyster shells ( ?). 
