Sertinil Mt. (q.)Oo' + ) 



u.. ,4. Cliffs on th. nortl, side of the Upper Clearwater River, in which the pre-Devonian section is s.n.Uar to that of Fossil Mountain. D = Devonian. S = Sarbach of the Ordovican. M = Mons of Ozarkian, and L = Lyell of Upper Cambrian. (C. D. Walcott, .924.) 



Brachiopod Mt. 



I'tarmigan Peak (10,070') 



Fossil Mt. (9665') 



Fig. 15.— Pa 



0- — ranoram 



ountani; °" 'lie right Ptarmigan Peak with its basal beds thrust over onto the limestones of Fossil Moimtain in the center, and on the left the end of Brachiopod Mountain with a great mass of limestone that has broken 

 away irom the mountain. Baker Lake in central foreground is 8 miles (12.9 km.) east of Lake Louise Station. (C. D. Walcott, 1924.) 



