PHYSIOGRAPHY OF BISHOP CONGLOMERATE 605 



of fifteen miles or more, nearly to Green River. A similar plateau, 

 known as Little Mountain (Quien Hornet Mountain of the Powell 

 Survey), lies to the west and southwest of Miller Mountain, from 

 which it is separated by the deep valley of Sage Creek. Rife 

 Mountain, a flat-topped mesa about two miles long by one mile 

 broad lying nine miles east of Miller Mountain, is a detached 

 remnant of the same plateau lying at an accordant altitude and 

 capped by similar gravels. Between this and Miller Mountain 

 are five smaller isolated gravel-capped areas lying at accordant 

 altitudes. Ten miles southeast of Miller Mountain is a good- 

 sized remnant of the same gravel-capped plateau known as Bishop 

 Mountain, or sometimes locally as Pine Mountain. It is from this 

 plateau that the gravel-formation, the Bishop Conglomerate, 

 receives its name. 



Bishop Mountain is the type locality of Powell's "Bishop 

 Mountain Conglomerate" as defined in his Uinta Mountain report. 

 The shorter term, "Bishop Conglomerate,"^ has however recently 

 been adopted by the Board of Geologic Names, and is, therefore, 

 used here in preference to Powell's name. The Bishop Conglomer- 

 ate is the same as the "Wyoming Conglomerate" of this same 

 region as described by King in his " Survey of the 40th Parallel." 



The surface of the plateau is -everywhere even and the isolated 

 portions all lie at accordant altitudes. The surface as a whole 

 strikes about 20° north of west and slopes to the north from the 

 most southern exposure to the low area four miles south of Aspen 

 Mountain. There is then a rise toward the north to the base of 

 the mountain. A few elevations will give an idea of the slope of 

 this surface. The highest part of Miller Mountain is, in round 

 numbers, 8,500 feet; Rife Mountain, 8,400 feet; the low area 

 south of Aspen, 7,600; and the plateau at the west base of Aspen, 

 7,900' feet. Bishop Mountain is considerably higher and the same 

 is true of the southern part of Little Mountain. The slope of the 

 gravel surface is so even, and the accordance in elevation of isolated 

 remnants is so close, that one may stand on the top of one of them 

 and, looking along the strike, see the trees on the top of the others, 



I A. R. Schultz, "The Southern Part of the Rock Springs Coal Field, Sweet- 

 water Co., Wyo.," Bull. U.S.G.S. No. 381,112. 



