GEOLOGIC AND TOPOGRAPHIC MAP 
NORTHERN PACIFIC ROUTE 
From St. Paul, Minnesota, to Seattle, Washington 
Base compiled from United States Geological Survey Atlas 
eets, from railroad ieee tos ad profiles supplied by 
rn Pacific Railw mpany and from —— 
seeks collected with the sseletainee of this comp: 
UNITED STATES GEOLOGICAL sunee 
GEORGE OTIS SMITH, DIRECTOR 
David White, Chief Geologist R. B. Marshall, Chief Geographer 
1915 
with a name in parenthesis in the 
hicior ‘left cornet is i mapped in Sa on the U. S. G. S. Topographic 
Sheet of that n 
Sheet No./6 8b 
Th 
1 
Scale 500,000 
Approximately 8 miles to | inch 
5 a: eae 
rv . . + Low i. i 
Sooke ve 200 feet 
ELEVATIONS | 
St. Paul, Minnesota. ho: 
Bisco 611 
19 3 40 1S 20 Kilometers” 
¢ 
OR 
The crossties on the railroads are spaced | mile apart 
a 
EL.44 
ee Perna 
@ 
o 
Sheet No, /4. 
EXPLANATION 
; Thickness 
= in feet 
A Stream deposits (alluvium) 
and glacial drift Quaternary 
B White clay and volcanic ash 
(lake beds) 200 Late Tertiary 
C Dark sand shale, {Early Tertiary 
mainly voleanic — if 000 <and lat 
(Livingston formation * cer 
D gone» and shale, with coal Upp 
= 750» OP Hocus 
a & shale. ( lorado) 3,700} 
ere Hrenen a0 gost ye shale, Lowe 
E tn — formation) _ 500 Cretaceous 
Impu = 
(Ellis formation) 460 Jurassic 
(Quartzite and impure limestone } 
+" uadrant formation) 400 Carboniferous 
iaesive blue limestone aca, ) 1,500) 
(Shale and anak Enecaion 
(Threeforks 440 Devonian 
K {Dark lime altin’: ‘Fetters 
iLimestone (G rere : : 
iQuartzite and s 835 Cambrian 
L “(Flathead « qu a j 
TT, Sandstone, conglomerate, slate, 
and sandy limestene (Belt s series) 5 3,000 Algonkian 
Q Lava fowk basait 1 Tertiary or later 
-'T Lava flows and intrusive masses, : 
oe as i" Tertiary 
| U, Dikes of various kinds of igneous rocks) 
A NAL _ PARK 
rs 
