278 SADDLE AND CAMP 



tered as they are over a wide territory, no ap- 

 proximation of the number could be made with 

 any degree of accuracy. 



What is known as the Gros Ventre "slide" is 

 situated some two miles above the place where 

 we were camped. This is a section of mountain 

 perhaps one mile wide and extending up the 

 mountain side five miles, which is gradually 

 changing its position and sliding down toward 

 the river gorge. The first movement was no- 

 ticed in 1907, and though the mountain side is 

 sliding too slowly to be noticeable to the naked 

 eye, save by the constant rolling of pebbles, or 

 the trickling of gravel upon slopes, the area 

 affected now has the appearance of having been 

 shaken by a terrific earthquake. Trees have 

 been rolled under; crevasses fifteen feet deep 

 have opened; high pressure ridges have 

 formed; in level places ponds have been filled 

 and other ponds formed; and the Gros Ventre 

 River, at the foot of the slide, has been pushed 

 out of its old channel and against the base of a 

 precipitous mountain opposite. 



The slide is indeed pushing against this other 

 mountain, gradually raising the river and form- 

 ing a lake above, where none formerly existed. 

 Above the river gorge, formed by the slide on 

 one side and the mountain on the other, is a 



