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 



PREPARED UNDER THE DIRECTION OF 

 GEORGE OTIS SMITH, DIRECTOR 



EXPLANATION 



D Lake Bonneville at ita highest stage and the 

 sedimentfi deposited in its waters 



E White shale and sandstone (Green River formation] 



p Red shale, sandstone, and coarse conglomerate 

 (Wasatch formation) 



H Sandstone, shale, and coal beds iMesaverde formation) 



Age 



Pleistocene 



J 



1.600 

 1,400 



M Brown sandstone (Dakota sandstone) 



^ Variegated shale and sandstone ' McElmo 

 formation and La Plata sandstone) 



O Limestone and sandstone 



P Bright-red sandstone and shale 



Q Limestone, sandstone, and shale 



Fault 



■ Upper Cretaceous 3,6 



Triassic 

 Carbon if en 



U. S. GEOLOGICAL SURVEY 



Shf^t No lO 



BULLETIN 707 SHEET No. 9 



V. 





