lis 



THK K'K A<;K IX CANADA. 



^ slopii (aimiiintiii<i;, as has 



I Itt'i'ii shown, t(t (iNcr t'oiii' 



;5 foci Iter iiiiU') tn the lirst, 



^^ transverse watei-shed and 



^ plalean (if the IJ^'nitf 



S TerLiar\'. Such an ice- 



t- sheet, moving' ihrouuh- 



"c out on hi'oad itlains of 



2; I soft, unconsohdalcd Cre- 



J t laccous and Tertiary 



" = rocUs, would he ex])ected 



r ^ to mark the surfaces with 



^ hroad Ihilin^s parallel to 



I I its direction, and to oh- 



2. t literate the transverse 



% ": watersheds and valleys. 



5 ti " If it l>e supposeil that 



= ^ a hu;4e <flacier, restin<^ 



I I on the Laurent ian axis, 



I s])read westward across 



1 I the plains, the i)hysical 



p, E (Utru'iiltics arc cvuii more 



p 3 serious. The ice inoviuLj 



I ' 



gained the second prairie- 



? southward, after hazing' 



I descended into the J{ed- 



I lliver trough, would have 



I had to ascenil the eastern 



I escarpment of soft Cre- 



5 taceous rocks forming its 



^ western side, which in 



■s one place rises over 900 



" feet ahove it. Having 

 steppe, it would have ha<i to 



