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AMPBELL, Geologist A. C. ROBERTS, Topographer 
1922 
EXPLANATION 
Age Thickness 
in feet 
tain glaciers as they were during the 
5 Ice Age 
Pleistocene 
Lake aurea vd at its highest stage and the 
sediments deposited in its waters 
White shale and sandstone (Green River formation) 
Tertiary 
Red shale, sandstone, and conglomerate (Zocene) 
(Wasatch formation) J 
Shale and sandstone (Mancos shale) Upper Cretaceous 
Limestone and sandstone Jurassic 
Bright-red shale and sandstone Triassic 
Carbonif 
Red sandstone and fae oe formation) ° 
conglomerate quartzite) ans sr 9,000 
f iferous 
Limestone (Mississippian) 7,000 
i Devonian 
Shale and quartzite Cambrian 2,000 
Quartzite, schist, and slate Pre-Cambrian 12,000 
Lava flows (andesite) Tertiary 
Igneous intrusive rocks (granite, diorite, 
and porphyry) 
— — Fault 
GEOLOGIC AND TOPOGRAPHIC MAP 
OF THE 
RIO GRANDE ROUTE 
From Denver, Colorado, to Salt Lake City, Utah 
a aos United States Geological Survey atlas 
sheets and reports, from railroad alinements and pro- 
files pis Ho py the Teves & 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 
DAVID WHITE, Chief Geologist 
M. R.C 
The geology of the region. about Salt Lake Gity is very complicated, and it 
C. H. BIRDSEYE, Chief Topographic Engineer 
e@ map here fom 
is based largely on that of os Fortieth Parallel Survey, modified to fit, as well 
as possible, the present wo. 
U. S. GEOLOGICAL SURVEY 
BULLETIN 707 SHEET No. 10 
UTAH. 
ar 112° 
II? 30° 
0 
FE}, 
Scale 
Approsetiaa 8 prrics tol = 
0) 
5 
F ee ae eae ok 
— 
| 
= 
0 Miles 
10 15 Kilometers 
rs 
te pyc alah 25) / Sol t re é Pies ae The 
: d ke 
Gogorza 
Kimbal! 
Snyderville 
The wigpeoon: | from Denver. Golorado. are shown ever: 
jes on the railroads are spaced | pi ae 
Relief shading by R. W. Berry 
mPARK CITY 
, 
