XO. 2 



SMITHSONIAN EXPLORATIONS, 191! 



15 



Bow Pass, four miles (6.4 km.) north of the head of i5o\v 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 Alista}-a River. The bold escarpment on the north side of the 



Fig. 16. — Pyramid Peak reHected in pond near MLstaya River, about 17 miles 

 {2^.2 km.) north of Bow Lake. Photograph hy W'alcott, 1918. 



lake is continued to the norili down ilu- .\lista\a l\i\er in ilie Sas- 

 katchewan. Several sections were examined along iliis fnmt, whicli 

 were found to be similar to the section at the liead of I'.ow Laki\ 



Pe_\to ( dacier is a ver)- tine illustralion of a coni]ilete glacier from 

 the gathering field of >now on tlic ( 'oiiliin'nt.al l)i\idc lo llir ice 

 arch at its foot. As >lioun in figure \ \ fi'onli^]iii'C(.- ) , \\\v llood plain 

 at the foot of the glacier e.\tc'nd> lor iicaiK a mile to ibe v(Vji,v ot the 

 lake. aftordinL;- a tine illustr.alioii of ilic maimer ot lillinL; in ot Ljlarial 



