BULLETIN 611 : ; SHEET No. 17 
SSC ane a ere Me 
2PM AET LS ISTE GIR 
11230' 112° lilso7 MONTANA 
| 
EXPLANATION 
Thickness 
in feet 
A Stream deposits (alluvium) Quaternary 
B Sand, gravel, and volcanic ash (lake beds) 1,200 Late Tertiary 
(Dark shale and dst (Colorado shale) 1,500 Upper Cretaceous 
GEOLOGIC AN D TOPOGRAPHIC MAP 1.77 E 4Sandstone and red shale (Kootenai formation) 1,5 Lower Cretaceous 47" 
"ed (Impure limest i quartzite (Ellis f ti 430 Jurassic 
(Sands di jrant fi 
encecinte an om Carboniferous 
OF THE 1 y ” Pe 
Hq iM ive blue limestone ison) 
NORTHERN PACIFIC ROUTE = {tate a a aaa 
From St. Paul, Minnesota, to Seattle, Washington 
R Lava flows, rhyolite 
L. Shale, sandstone, and limestone (Belt series) 3,300 Algonkian 
Base compiled from United States Geological Survey Atlas € Gattis etrasive 
Sheets, from railroad alignments and _ profiles supplied b eo tas Maes andaslie 
the Northern Pacific Railway Company and from additional 
information collected with the assistance of this company 
UNITED STATES GEOLOGICAL SURVEY 
GEORGE OTIS SMITH, DIRECTOR 
David White, Chief Geologist R. B. Marshall, Chief Geographer 
1915 
Each quadrangle shown on the map with a in 5 thesis in the 
wer left corner is mapped in detail on the U. S. G. S. Topographic 
Sheet of that name. 
(Sheet Vo /8) 
ata a; 
7& a . 
Farmsen 
Broadw 
Bsr: 
Ne 
ian 
Li A eee F 
eS 
i 
ake 
ie: Lae 
~: eid Pt Sy 
SYS 
\) 
bye a Ee“ k 
ge, [ SS = 
1) 
ie 
<0 ff 
eR YS 
- so ot 
- ROSA 
ib SG yl 
ay 
ale , 
Approximately 8 miles to | inch 
5 S ee 
a L i i 2. L - 
5 10 5 a 
i ae ee L 
Contour interval 200 feet 
3) Ss ELEVATIONS IN FEET AGOVE MEAN SEA LEVEL 
=> 
; The distances from St. Paul, Minnesota. id 
: Th he railroad: spaced | mile apart 
12°s0° 
i 
2° (Sheet Wo /6) 
