GEOLOGIC AND TOPOGRAPHIC MAP 
OF THE 
NORTHERN PACIFIC ROUTE 
From St. Paul, Minnesota, to Seattle, Washington 
Base compiled from United States Geological Survey Atlas 
Sheets, from railroad alignments and profiles supplied by 
ilway 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 name in parenthesis in the 
lower left corner is mapped in detail on the U. S. G. S. Topographic 
Sheet of that flame. 
BULLETIN 611 
46 ~ 
< . 2 
.*) Jud} ait 
< ras th River < 
‘ \ 
= 
G 
S Scale 500,000 
Approximately 8 miles to ! inch 
| as, er Os 
SHEET NO. 13 
BPE Re OA TER IEEE DIET 
108%30’ 108° MONTANA 
EXPLANATION 
Thickness 
in feet 
A Stream deposits (alluvium) Quaternary 
B Sandstone and shale (Lance formation) 1,100 Tertiary (7?) 
C Dark shale, marine deposit, (Bearpaw) 900) 
PD Shale with some sandstone, fresh-water 
deposits (Judith River formation} ad ; J 
E Shale and sandstone, marine deposits , Upper 
(Claggett formation) 600f Cretaceous e zs 
F Sandstone (Eagle) 200 a a Aros 
ra on \ ~| 
G Dark shale, marine deposit (Colorad 1,300} oot AE A 
Se) NS) 
st Nibbard Oia 78000 iG 
teal 
fh MRS PO pe, 
AES Ror Ss vA SS 
Sheet No /2 4 
: te ep 
i yt 
/ — 
mA + ib 
20Miles 
ee | 
5 10 1s 20 2 30Kilometers 
‘7 | Se Se eee ees, he le i SESE OE Oi eae Uae | 
Contour interval 200 feet ra 
v 
from St. Paul, Minnesota, h -y 10 mi - 
The crossties on the railroads are spaced | mile apart ie 
108°30" 108° 
ENGRAVED ANG PRINTED BY THE U.S.cE OLOGICAL SURE 
