GLACIAL FEATURES OF BEARTOOTH PLATEAU 131 



Pole trail, on the pass at the head of Lodge Pole Creek, granite 

 bowlders were found high on the andesite slopes, nearly 1,500 

 feet above the contact of the Paleozoic series on the granite. 



Similarly moraines on Dead Indian Creek carry much granite, 

 and granite bowlders were noted on andesite outcrops on the south 

 side of the low pass between the head of Dead Indian Creek and 

 Rattlesnake Creek. This occurrence is eight miles south of any 

 granite outcrop and nearly 2,000 feet above the contact of the 

 Paleozoic upon the pre-Cambrian, near the mouth of Dead Indian 

 valley. 



In the light of these facts it would seem that the Beartooth 

 Plateau was occupied by an ice cap that sent several tongues east- 

 ward into the edge of the Bighorn Basin, and a number southward 

 across the Clarks Fork Canyon several miles up the valleys of Sun- 

 light, Elk, Russell, and Dead Indian Creeks. 



