SOME LOCAL DETAILS. 



205 



The comparative table given in chapter II. shows that 

 somewhat similar conditions prevail over the great plains 



1. Section of Drift on Milk River (o) Boulder-clay ; (5) older river alluvium ; (c) newer 



river alluvium ; (d) surface matter. 



2. Section of Drift at Long River () Lower drift, chiefly local, and with false bedding 



(&) upper drift with large travelled boulders. [After Dr. G. M. Dawson.] 



west of lake Superior, the formation of which have been 

 described by Dr. G. M. Dawson in his Eeport on the 49th 



