ZONES OF DIVERSE DISPLACEMENT. 31 



faulting and flexing- were on a grander scale and as a consequence of this 

 greater displacement, the accumulations of sediments are greater and the 

 unconformities more apparent and complex. Another consequence of the 

 greater displacement is that the deep lying metamorphic rocks are brought 

 up and .exposed by denudation, so that extensive groups of crystalline schists 

 and quartzites appear. 



This geographic district, the Wasatch Subprovince, terminates on the 

 south at Mount Nebo, and is quite distinct geographically as well as geologi- 

 cally from the subprovince to the southward, which may be termed the 

 Sevier and Rio Virgen Sub-province. 



Thus the Wasatch and Sevier districts separate the Basin and Plateau 

 Provinces, not by the introduction of new types of structure, but by a com- 

 bination of the types observed on either hand and being complicated by 

 conditions consequent on their forming for a long time the shore line be- 

 tween the two. In the Sevier portion of the belt the Kaibab structure pre- . 

 vails, while in the Wasatch portion the Basin Range structure prevails. 



The great Wasatch Range presents a bold front to the west due^ in a 

 general way to a great fault or rather a series of faults such as I have de- 

 scribed as occurring in the Basin Ranges; but on the east or back slope of 

 the range the structure is complex. An irregular belt of country stretching 

 from the crest of the mountains eastward many miles is faulted and flexed 

 in many ways. 



In the northeast angle formed by the Wasatch and Uinta Mountains 

 there is a long but narrow and irregular zone stretching toward the north- 

 east from the head- waters of the Bear River. Sulphur Creek drains a part 

 of this, and the well known Bear River coal lands are found in the district. 

 From Aspen to a point near Carter, the Union Pacific Railroad runs along 

 the eastern border of the belt. Its extension in either direction beyond the 

 points indicated are unknown to me. This belt also exemplifies what I 

 have called Zones of Diverse Displacement, and the general effect is upheaval. 

 The belt seems to have been broken into very irregular blocks by lines of 

 faulting or flexure which so far as my observation has extended preserve 

 no law of direction. 



The blocks into which the country has been broken have been tilted, 



