1892.] 



NATURAL SCIENCES OF PHILADELPHIA. 



479 



above the river. These boulders uierease in abundance on the north 

 side, but ai'e mingled in irregular fashion Avith the disintegrated 

 material of the gneiss of which the mountain is constituted. It is 

 this disintegrated local material, both here and at High Bridge and 

 Pattenburg, I presume, which Professor Salisbury has attributed 

 to an earlier glacial epoch. Two or three miles farther north begin 

 the accumulations which have been called the terminal moraine. 

 It is important to notice that there is continuity in the distribution 

 ■of this foreign material from the moraine southward over Scott's 

 Mountain into the valley of the Pohatcong at Washington, but that 

 the continuity seems to be broken at the low ridge of Pohatcong 

 Mountain. 



On going farther west this same continuity in the distribution of 

 foreign material in front of the moraine occurs down to an equal 

 and even longer distance south. The Medina and Oneida boulders 

 are very abundant at Little York, which is near the summit of 



