58 
ARTESIAN WELLS ON THE ATLANTIC COAST. 
[bull. 138. 
Collingswood, Camden County.- 
is as follows : l 
-The record of the well at tliis place 
Feet. 
f 0-8 surface sand. 
40-48 marly clay of dark color. 
48-71 sandy clay of lighter color. 
71-96 gray clay. 
96-105 greenish marly clay, with sand and gravel mixed. 
105-125 same, but lighter in color, with large white pebbles. 
125-141 whitish sand. 
141-143 white clay. 
143-170 red clay. 
170-184 reddish sand. 
184-196 whi te.clay . 
196 coarse yellowish- white gravel, with large pebbles, and water. 
The water horizon is thought to be about 200 feet above the base of 
the Raritan formation. The coarse materials at 105-125 feet appear to 
be the basal Matawan beds, which yield water at various wells in the 
surrounding region, but no waiter was reported at this horizon in the 
Collingswood well. 
Columbus, Burlington County. — In the deep well of the Rancocas 
stock farm of Pierre Lorillard the record is as follows : 
Feet. 
0-14 yellowish loams and sands, water bearing. 
14-48 fine sand, water bearing. 
48-72 stiff black sandy clay. 
72-73 fine sand, muddy, and water bearing. 
73-82 stiff black sandy clay. 
82-116 fine sand, water bearing; containing scattering layers of 
sandstone on clay or shell rock from 3 to 5 inches thick. 
116-117 black sandy clay. 
117-124 fine sand, water bearing. 
124-125 black sandy clay. 
125-128 fine sand, water bearing. 
128-178 dark sandy clay, containing scattered layers of sandstone 
and shell rock, 3 to 5 inches thick. 
'178-306 dark sandy clay, changeable to more sandy, with scatter- 
ing layers of sandstone, shell rock, shells, and wood. 
306-314 fine sand, some gravel, sand crusts and floating brown clay 
lumps, water. 
314-338 red and white variegated clay. 
338-356 sand and sandrock alternately, from 5 inches to 2 feet 
thick, with some thin clay veins and considerable wood. 
356-367 f 
367-370 fine sand. 
370-387 coarse sand with small amount of water. 
387-390 coarse gravel. 
390-395 fine sand. 
395-400 white clay. 
400-410 white clay and some coarse gravel. 
410-432 fine white sand. 
432-440 dark sand, full of mica; looks like rotten rock. 
New Jersey report for 1892, p. 302. 
