66 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull. 138. 
Feet. 
124-131 strata with old wood. 
131-146 mud and shells. 
146-196 hard rock layer. 
196-231 sand and water. 
231-245 dark slushy sand. 
245-261 yellow sand. 
261-306 coarse red sand. 
306-318 dark sand. 
318-331 white clay. 
331-368 green marl, ferruginous water. 
368-375 slate stone. ( ?) 
The beds from 85 to 14G feet are regarded by Mr. Woolman as the 
representatives of the great Chesapeake diatom clays. Those from 146 
to 231 feet are regarded as the base of the diatomaceous series, and the 
nondiatomaceous beds below are correlated with the water horizon 
of 700 to 720 feet at Atlantic City. The beds from 231 to 375 are thought 
to represent the Perna marl, brown sands, chocolate clay, and green 
Shiloh marl of the Atlantic City wells. The record is considered simi- 
lar to that of the Winslow well, and it is suggested that if drilling had 
been continued through the marl or marly clay to an additional distance 
of 75 to 80 feet there would have been found the same water horizon 
that supplies the deep well at Winslow, and which is probably the 
equivalent of that at 960 feet at Atlantic City. This would indicate a 
dip of 25 feet per mile. Some large oyster shells were taken out of this 
well, but the species were not identified. 1 
Hartford, 2 Burlington County. — The well is on the farm of S. C. 
Roberts, about 1J miles north of Hartford, at an elevation of 70 feet 
above tide. Water was found at 161-167 feet, which rose nearly to 
the surface, but it was filled with fine sand. The well was deepened 
to 187 feet, but was abandoned just above the water horizon that occurs 
at the base of the Matawan formation. The record is as follows: 
Feet. 
0-39 yellow sand. Laminated sands. 
39-46 micaceous, sandy clay ; light chocolate color. 
46-100 hlack mud, or clay marl. 
100-117 green marl. 
Clay marls. <^ 117-157 clay marl. 
157-163 sandy clay. 
163-168 sand; fine, whitish gray. 
168-175 sand ; darker gray. 
Lower sands of K 175-181 coarse white sand and gravel, with some mica. 
clay marls. ( 181-187 slightly coarser sand, bluish gray in color. 
EigJitstoum, Mercer County. — The record of the well at this place was 
supplied by Messrs. I. S. Cassin & Son, of Philadelphia, who bored it: 
Feet. 
0-4 top soil. 
4-39 black-clay mud. 
39-66 fine white sand (yielding 30 gallons a minute). 
1 Woolman, in New Jersey report for 1892, pp. 288-289. 
2 Loc. cit.,pp. 304-305. 
