High mountain area dissected by 

 many deep glaciated valleys with nu- 

 merous small existing glaciers. 



Continental divide. 



Catchment hasin of main part of 

 Two Medicine Glacier of Wisconsin 

 stage of glaciation. 



Deposits of mountain glaciers of 

 Wisconsin stage in valleys and on 

 the plain east of the mountain front 

 (mapping not complete). 



Deposits of Keewatin ice-sheet of 

 the Wisconsin stage of glaciation. 



(Boundary in part irom F. H. R. 

 Calhoun.) 



Deposits of pre-Wisconsin glacial 

 drift and associated gravel capping 

 high ridges whose tops are remnants 

 of the second (lower) peneplain (map- 

 ping not complete). 



Catchment hasin of glacier which 

 extended northeastward onto Hlack- 

 foot peneplain at a pre-Wisconsin 

 stage of glaciation. 



Deposits of pro- Wisconsin glacial 

 drift and associated gravel capping 

 high ridges whose tops are remnants 

 of the highest or Hlaokfoot pene- 

 plain (mapping not complete). 



ilON OF GLACIER NATIONAL PARK, MONTANA 



irvey, 1912 



