518 C. P. BERKEY — fcTRATIGRAPHY OF THE UINTA MOUNTAINS 



is considerable divergence of opinion, represented by Major Powell on 

 one hand and the Fortieth Parallel geologists on the other. 



Stratigraphic Problems 

 From the foregoing it will be seen that there are two well marked 



The Uinta mountains are an east and west range in northeastern 

 Utah. At their western extremity lie the Wasatch mountains, border- 

 ing the east side of Salt Lake valley. Toward the east the Uintas cross 

 the Green river and enter Colorado. A glance at the accompanying 

 ketch map will serve to orient other geographic features of the 

 region. 



structural and stratigraphic problems set before the 

 student of the Uinta region : 



1. The " Weber.quartzite " problem — thz t is, is the 

 great basal quartzite member of the Uinta mountains 

 series of sediments the " Weber " of Carboniferous 

 relationships, as the Fortieth Parallel survey held ; is 

 it Devonian, as Powell held, or is it of some other age? 



2. The " unconformity problem " — that is, is there 

 a continuous and perfectly conformable series of 



