530 C. P. BERKEY — STRATIGRAPHY OF THE UINTA MOUNTAINS 



it is useless to take up that line of argument. The writer feels justified 

 on the other grounds to present the above tabulated correlation as ex- 

 hibiting the best explanation of the known facts of stratigraphy in the 

 western Uinta mountains. It is to be regretted that the use of the term 

 Uinta for Tertiary beds in the same region makes its adoption objec- 

 tionable. 



The existence of two well marked beds of quartzite above the great 

 basal quartzite member, the barrenness in fossils of the first 3,000 feet 

 above it, the existence of an erosion interval and unconformity in the 

 Carboniferous itself, and, after making allowance for the hiatus, the close 

 correspondence lithologically between the Uinta strata and those of the 

 Wasatch from bottom to top, with no radical departure from the succes- 

 sion of the formations, all point to the same conclusion. At least no dis- 

 cussion of Uinta stratigraphy can afford to neglect the above structural 

 features. The fact that some of them have been overlooked or under- 

 valued is the writer's excuse for raising so large a question upon exam- 

 ination of so very limited field. 



The basal quartzite of the western Uintas is surely not " Weber." It is 

 apparently late Cambrian and possibly in part post-Cambrian lapping 

 up against the margins of the Paleozoic continent toward the east. 



It should have been known by the name that Powell gave it — that is, 

 the " Uinta formation " or Uinta quartzite — in preference to any other. 



