NO. 17 



SMITHSONIAN KXl'I.OKAIJONS, TQlT) 



and thus cx])o.se(l to erosion the heart of the i;reat arcli that had its 

 crest over the re.^ion now occupied hy Mount Victoria and other 

 peaks of the Bow Range. 



Fic. 22. — Staiularclizing the size of an old trail Rang oven beside the trail. 

 Photograph by Walcott, 1916. 



A glance into tliis wonderland is shown hy figures <; and 10. which 

 are views looking south across the Bow Valley into the heart of 

 the Rockies. The illustration of Pinnacle Peak (fig. ti) tells the 

 story of the tremendous pcnver of erosive agencies, where the colossal 



