DARTON.] 
NEW JERSEY. 
101 
Although the occurrences of water in these wells are not thought to 
be at uniform horizons, the Stockton and Pavonia, and probably also 
the Camden wells, all appear to draw from the same bed, but these 
wells are relatively near together. The bed consists of coarse sand 
and gravel, sometimes with bowlders, and it contains a fairly large sup- 
ply of water. The failure of the mid-Raritan horizon to furnish a satis- 
factory water supply at Mount Holly, Columbus, and Jamesburg appears 
to indicate the existence of an area in which the deposits are too fine 
to carry much water or are completely inclosed by fine materials. If 
these wells had been bored to the crystalline rock, a short distance 
below the depth at which they were abandoned, tbere is some chance 
that plenty of good water would have been found in the basal Raritan 
beds. The Keyport well clearly obtains its water from beds consider- 
ably above the base of the formation and indicates the presence of a 
water-bearing stratum at about the same horizon as that in the region 
near Camden. The same horizon, or one near to it, furnishes a water 
supply at 601 feet at Holmdel, and at 480 feet at Atlantic Highlands. 
Its absence in the boring to 264 feet at Matawan would seem to indicate 
that the horizon was of very restricted extent in the Keyport region, 
unless by mishap it was u passed" in the Matawan well. As I do not 
know precisely the relative altitudes of the two wells and the dip of 
the beds, it seems also possible that the well at Matawan did not 
penetrate sufficiently deep to reach the horizon of the Keyport 
water. 
No attempt has been made to represent separately on the map the 
area underlain by the waters in the Raritan formation, for it is practi- 
cally the same as that underlain by the water in the basal beds. Some 
of the relations of the Raritan waters are shown on the cross sections 
on PI. Ill, and the wells which obtain water from the horizon have an 
R after them on the map, PI. I. 
Base of the Matawan formation. — In the region east and south of Phila- 
delphia there are many wells which supply a large amount of fine water 
from this horizon. In that region there appears to be a nearly general 
sheet of coarse gray sands and pebbly beds lying on the surface of, or 
constituting a transition series into, the Raritan formation, which may 
be relied upon for water over a wide area. The following wells have 
penetrated to the horizon : 
Locality. 
Cinnaminson 
Woodbury, 1 mile north 
Woodbury village ; several wells 
Wenonah 
Sewell 
Woodstown 
Gloucester 
Depth to 
horizon. 
Feet. 
104-16:5 
320-341 
420 
340 
64-102 
Remarks. 
450 gallons per minute. 
8 gallons per minute. 
Variable amounts. 
40 gallons per minute. 
25 gallons per minute. 
Fair supply. 
13 wells; large supply. 
