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(fig. 6) has been cut out by erosion from the Hmestones between 

 Douglass and Fossil mountains, and figure 6 illustrates the crumpling 

 of shaly limestones by thrusting of a series of massive limestone strata 

 against them during the period of displacement of the great series of 

 formations of this part of the Cordilleran ranges. 



Fossil Mountain, named from the presence of Devonian corals, is 

 about 9 miles (144 km.) northeast of Lake Louise Station and faces 

 Baker Creek Pass on the east. It has a good section of Devonian and 



Fig. 10. — Wild flower camp on northwest side of Johnson Creek Pass. 

 (Mrs. Mary V. Walcott, 1921.) 



pre-Devonian rocks on its eastern slope. There is a fine outlook from 

 camp at the east foot of the mountain. 



The broad Ll-shaped valley (fig. 9) between Fossil and Oyster 

 mountains has been eroded in the shale and thin bedded limestones 

 that pass beneath Fossil Mountain ; this formation is one of those in 

 the Sawback Range that is readily worn away, with the result that the 

 agencies of erosion followed by the glaciers have made a valley al- 

 together disproportionate to the present erosion agencies, water, frost 

 and snow. 



At a camp in the heart of the Sawback Range on a tributary of 

 Baker Creek leading up to Johnson Pass there was a wonderful 



