NO. 2 



SMITHSONIAN EXPLORATIONS, I918 



IS 



Bow Pass, four miles (6.4 km.) north of the head of Bow Lake, 

 has been eroded by glacial action into a broad, park-like area, so that 

 the passage over into the valley of the Mistaya River of the Sas- 

 katchewan River drainage is scarcely realized until steep slopes 

 indicate the approach toward Lake Peyto. This beautiful lake, with 

 a glacier at its head, as shown in figure i (frontispiece), drains into 

 the Mistava River. The bold escarpment on the north side of the 



Fig. 16. — Pyramid iV'ak reliecled in puiid near Mistaya River, about 17 miles 

 {2y.2 km.) north of Bow Lake. Photograph by Walcott, 1918. 



lake is continued to the north down the Mistaya River to the Sas- 

 katchewan. Several sections were examined along this front, which 

 were found to be similar to the section at the head of Bow Lake. 



Peyto Glacier is a very fine illustration of a complete glacier from 

 the gathering field of snow on tbe Continental Divide to the ice 

 arch at its foot. As shown in figure i ( frontispiece), the fiood plain 

 at the foot of the glacier extends for nearly a mile to the edge of the 

 lake, afifording a fine illustration of the manner of filling in of glacial 



