E.i't I'd -Mora hue Drift in JVev Jersey. — WricjJif. 209 
the State surve}'. * In these papers many localities are given 
where glacial, or probably glacial, deposits have been found, south 
of tlie terminal moraine traced b}' professors Cook and Smock. 
Detailed descriptions of some of the deposits are given, and their 
origin" is explained. T am indebted to these papers of professor 
Salisbury for a list of localities, man}' of which I have visited, 
and it is a pleasure to confirm the accuracy of the descriptions in 
most essential points. I shall only attempt to add some details, 
which it is hoped may throw additional light upon the nature of 
the deposits, and perhaps to show, that a somewhat different in- 
terpretation of their origin may be fairly entertained. 
It Avould seem, as a result of our investigations, that the de- 
posits at localities described as showing extra-morainicglaciation, 
extending from Belvidere and Oxford Furnace on the north, to 
the vicinity of Trenton and Monmouth Junction on the south, 
may all be comprehended under three groups. 
1. True GlaciaJ Deposit i(,\?i\d down by the same ice sheet that 
deposited the moraine, and nearly contemporaneous with the moraine 
in their origin. The northern localities belong to this group. 
2. Water Z>f^:)os/V.s, whether of current or delta formation, or 
carried by floating ice. The southernmost localities belong to 
this group. 
3. Local Deposits^ which have the anomalous aspect of being 
glacial deposits in an unglaciated area. These, when better un- 
derstood, are likely to be thrown back into the first group, or else 
be explained by agencies which are non-glacial. The two lo- 
calities belonging to this group are High Bridge and Pattenburg. 
The region containing the first group of deposits is in the 
southwestern Highlands of New Jersey. Three parallel moun- 
tain ridges run southwesterly through it; the Musconetcong, the 
Pohatcong and Scotfs mountain. The ridges are of Archaean 
gneiss, and carry extensive deposits of iron ore. The interven- 
ing valleys are of magnesian limestone and Hudson River shale. 
The moraine runs eastwardly across these ridges, from Belvidere 
on the Delaware river through or near Butzville, Pequest Furnace, 
Townsbury, Hackettstown and Budds lake; rising from 300 feet 
above tide at Belvidere to 900 feet at Budds lake. 
In this triangular area, between the moraine on the north, and 
*Bull. Geol Soc. Am. Vol. ;3, pp. 173-182. 
Geol Siirv. N. J., Atmual Hojiort for 1891. 
