£. D. Chester—Distribution of Delaware Gravels. 197 
face rather than ground beneath the glacier’s base. The 
largest ones are scattered over the low ground or Cretaceous 
plain, yet often those weighing several hundred pounds are 
found as high as 250 feet above tide. Among the rock species 
found in bowider examination, the following are the most 
prominent ; 
; Fine grained red sandstone, certainly Potsdam. 
Dioritic trap, similar to Triassic bedded trap, (one 3'X 2}'X2’). 
Yellow friable-sandstone. 
Hornblende rock in massive bowlders, (one 2’ x 14/X 14'.) 
Black micaceous granite, foreign to the State, (one 24’ 2'X 1.) 
Gneiss far to the south, (one 2’ 1}’). 
ompact gray limestone. 
®. Quartzose, (one 3’x2’ 9X2’). 
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