210 STRUCTURAL GEOLOGY. 



ward the axial region, topographically, is a valley, for Bitter Creek divides 

 the uplift, a stream having an extra limital source a stream whose course 

 was determined antecedent to the uplift. 



In the heart of the uplift Cretaceous beds of extreme friability are found, 

 and the secondary drainage or lateral wet-weather tributaries to Bitter Creek 

 have excavated these valleys to the very heart of the uplift. 



Here 10,000 feet of beds have been carried away by the waters since 

 the inception of the uplift. 



