UINTA RANGE. 197 



River in its canons, since it cuts deep, narrow canons througli the hard rocks 

 of the ridges of Yampa and Junction Peaks, instead of winding through 

 the soft Tertiary strata, around their base, as with the present configuration 

 of the surface it would have seemed most natural for it to do. Here also 

 it is evident that its course was determined at a much higher level, when 

 these peaks were buried beneath Tertiary beds, which have since been 

 removed by erosion. 



