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NEW YORK STATE MUSEUM 



able range to neat, clear-cut deltas, wave-cut cliffs and beaches con- 

 fined within concise limits. No question can be raised as to the 

 origin of many of them. They represent remains of true glacial 

 lakes. 



Wilmington lake. The history of the Wilmington lake is, per- 

 haps, the best understood of all the local glacial lakes in the east- 

 central Adirondacks. It is chiefly confined to the Lake Placid quad- 



Fig. 13 The glacial lake succession in the Mount Marcy and adjacent quad- 

 rangles. Stage 5. The Wilmington lake, altitude iioo to 1157 feet. 



rangle, to the East branch of the Ausable river, and to the territory 

 around the town of Wilmington but sent a southern prong into the 

 Keene valley to the base of the Ausable Club hill. 



At the foot of Johns brook, especially on the western side of the 

 valley, there is an extensive delta with an elevation of iioo feet. 



