. S. GEOLOGICAL SURVEY 



BULLETIN 707 SHEET No. 8 



GEOLOGIC AND TOPOGRAPHIC MAP 



OF THE 



RIO GRANDE ROUTE 



From Denver, Colorado, to Salt Lake City, Utah 



Compiled from United States Geological Survey atlas 

 sheets and reports, from railroad alinements and pro- 

 files supplied by the Denver & Rio Grande Western 

 Railroad Co., and from additional information col- 

 lected with the assistance of that company 



PREPARKD UNDER THE DIRECTION OF 

 GEORGE OTIS SMITH, DIRECTOR 



EXPLANATION 



White eh&Ie and sandstone (Green River formation) 

 Red sandstone and conslomerate (Wasatch formation) 

 Sandstone, shale, and coal beds (Mesaverde formadoD) 

 Dark marine shale < Mancos shale) : in lower part 



sandstone iFerron sandstone member, Fei 

 M Brown sandstone t Dakota sandstone) 

 ^ Variegated shale and sandstone 'McElmo 



fornoation and La Plata sandstone) 

 . Fault 



2,200 

 - Upper Cretaceous 3,000 



Cretaceous ( ? I and 



