1884. | The Glaciated Area of North America. 757 
West of New Jersey streams are continually encountered 
whose sources are in the glaciated area, and whose mouths are 
in the unglaciated. -Fig. 2 illustrates this in the case of the 
Delaware, which is of special interest because the glacial terraces 
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; tint act cut (taken from “Studies in Science and Religion”) shows, in addi- 
Lehigh ange cciated area of New Jersey, the glacial terraces of gravel along the 
ove the Delaware rivers, and also the “ Delta terrace” at Trenton, fifty feet 
"er, in which Dr. C. C. Abbott has found palzolithic implements. 
traced continuously down the river from the boundary 
FA 
te: a "delta terrace” of large extent at Trenton, whose sur- 
. 'S fifty feet above the present flood-plain. It is in this glacial 
“C that Dr. C, C. Abbott has found so many palzolithic im- 
