GEOLOGIC AND TOPOGRAPHIC MAP 
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 f 
ag rom additional information col- 
lected with the assistance of that company 
PREPARED UNDER THE DIRECTION OF 
GEORGE OTIS SMITH, DIRECTOR 
DAVID WHITE, Chief Geologist 
M. R. CAMPBELL, Geologist A. C, ROBERTS, T: 
Cc. H. BIRDSEYE, Chief Topographic Engineer 
‘opographer 
1922 
EXPLANATION 
Age Thickness 
in feet 
E White shale and sandstone (Green River formation) 2,600 
Tertiary 
(Eocene) 
F Red sandstone and conglomerate (Wasatch formation) 8,000 
‘Sandstone, shale, and coal beds (Mesaverde oes: 2,200 
Dark marine shale ‘Mancos shale) ; in lower part 
a pec: one (Ferron sandstone member, Fer) > Upper Cretaceous 3,000 
M_ Brown sandstone (Dakota sandstone) | 50 
Variegated shale and sandstone (McElmo 
N formation and La Plata sandstone) 
Cretaceous (?) and 
Jurassic 1,800 
U. S. GEOLOGICAL SURVEY 
BULLETIN 707 SHEET No. 8 
110’ 30 
Sheet No.9 
ite) 
10 
30° 
109° 30° UTAH 
iia Ea 
cale 500,000 
Approximately 8 miles to | inch 
0 5 10 Miles Bd 
bi a ) 30 
or 9 10 a; Kilometers 
el 
The dj n Pius b 
The crossties on the railroads are spaced 
Relief shading by R. W. Berry 
1 mile apart. 
