POST-GLACIAL LAKES IN CANADA 



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Salt River an abandoned lake basin is distinctly shown in the 

 salt plains lying at the foot of an escarpment facing east (Figs. 5 

 and 6). The plains are for the most part void of vegetation and 

 form a broad flat, water-soaked in the wet season and salt-incrusted 

 in the dry. Shore-line conditions are shown by narrow spruce- and 



Fig. 5. — View of the salt plains on Salt River, west of Fort Smith, N.W.T. 

 (Photo by A. E. Cameron, 1920.) 



Fig. 6. — Another view of the salt plains on Salt River, west of Fort Smith, 

 N.W.T. (Photo by R. T. Hollies, 1920.) 



poplar-clad points jutting out from the irregular face of the escarp- 

 ment into the clay flats, bordered frequently by bowlder pavements 

 or shingle beaches. Low off-shore islands showing water-deposited 

 material are also noticeable (Fig. 7). The Salt River escarpment 



