﻿GLACIAL STUDIES IX CANADIAN ROCKIES 



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jacent glacier directly from the sun but supplies it liberally and uni- 

 formly with a rock mantle for its further protection. 



Fig. 82. — Ancient Wenkchemna moraine serving as a dam for Moraine lake. 



Fig. 83. — Great block-moraine, Wenkchemna glacier, enclosing Wenkchemna lake. 



5. Lake Barrier. — Entering the Valley of the Ten Teaks from the 

 Bow valley and passing Moraine Lake, one encounters a somewhat 

 puzzling morainic feature from which the lake has derived its pres- 



