6o2 



JOHN LYON RICH 



The paper, aside from its descriptive part, is an inductive and 

 deductive study carried out with the idea of reconstructing the 

 past history of the region from the physiographic features still 

 remaining. 



There is in the southwestern part of Wyoming a belt of plateau 

 country skirting along the northern base of the Uinta Mountains 



Fig. I. — Sketch map of portions of Wyoming, Utah, and Colorado, showing the 

 general location of the features described in this paper. 



in an east-and-west direction parallel to the range. This has 

 a general slope to the north away from the mountains. During 

 the summer of 1908 a portion of the plateau lying north of the 

 eastern end of the range and north and east of Green River was 

 mapped in detail by a United States Geological Survey party. 

 The conditions observed in that portion of the area form the basis 

 of this paper. Fig. i is a sketch map of parts of southwestern 



