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ANNALS NEW YORK ACADEMY OF SCIENCES 



son Eiver as examples of superposed streams now cutting gorges through 

 the harder rocks discovered by them, although their upper courses are 

 broad and open and significantly" adjusted to the less resistant formations. 

 Glaciers. — The subject of glaciation naturally falls under two heads, 

 that resulting from local valley glaciers and usually referred to as alpine, 

 and that resulting from the passage of a continental glacier or ice sheet. 



u^z 



Terminal Moraine 

 Long /stand 



Contour internal 20 ft. 



X^v vC 



Term in al Moraine M J, ' %&Ui\J& 



Fig. 8. — Characteristic view and map of portions of the terminal moraine 



In the White Mountains as well as in the Adirondacks and possibly in 

 the Catskills, too, very good evidences of alpine glaciation exist. The 

 instructor may with confidence refer to the head of Tuckerman Eavine 

 (Fig. 7), Great Gulf and King Eavine as well formed cirques on the 

 slopes of Mount Washington and the Presidential Eange (Fig. 25). 

 Hermit Lake is apparently a little tarn. The mere names of some of the 

 other ravines and features are suggestive, as Eavine of the Castles, Eavine 



