BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 VOL. 3, PP. 173-182 MARCH 31, 1892 



CERTAIN EXTRA-MORAINIC DRIFT PHENOMENA OF NEW 



JERSEY. 



BY R. I). SALISBURY. 



(Read before the Society August 25, 1891.) 



< iONTENTS. 



Page 



Previous Opinions concerning the Drift Margin 173 



Results of recent Studies • ■ 175 



Critical Localities and Exposures 175 



I )irect Evidence of Ice Work 179 



Distribution of the Phenomena 1 79 



Significance of the Observations 180 



( reneral Bearing 180 



Number of Ice Invasions 180 



< orrelations of Deposits 182 



Previous Opinions concerning the Drift Margin. 



The terminal moraine running across New Jersey from Perth Amboy 

 to Belvidere, and continuing thence across Pennsylvania, was first traced 

 out under the auspices of the surveys of these stales. The work in New 

 Jersey preceded that in Pennsylvania, and was anion-' the earliest mo- 

 rainic studies. In both states the terminal moraine referred to was pub- 

 lished as representing the limit of glacial drift, and this conclusion. 

 announced by the surveys of the respective states, was accepted by geolot 

 prists as correct. 



[nterpreting eastern phenomena by western, glacialists not intimately 

 familiar with the eastern field regarded the southern portion of the New 

 Jersey and Pennsylvania drift as belonging to the first glacial epoch. 

 The I'm et thai the glacial drift of the interior is not Limited on the south 

 by a terminal moraine was well known, and the southern limitation of 

 the eastern drift by a terminal moraine seemed to put the two regions in 

 Bharp contrast. Bui it was believed thai ifthe known moraine of New 

 Jersey and Pennsylvania represented the southern limit of the drift, other 



Will Bon 1 3oi \m . Voi„ 3 1891 ' ' ""' ' 



