GEOLOGIC AND TOPOGRAPHIC MAP 
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 
the bet Pacific Railway Company and from iin 
information collected with the assistance of this co 
UNITED STATES GEOLOGICAL eS 
GEORGE OTIS SMITH, DIRECTOR 
David White, Chief Geologist B. Marshall, Chief Geographer 
1915 
a quadrangle shown on the map renthesis in the 
wer left corner is mapped in deal on the U. S.C. S. Topographi 
ives 
BULLETIN 611 
SHEET No. 7 
NORTH DAKOTA 
101" 100%30° 
| 
EXPLANATION 
Loose surface materials 
A tream deposits (alluvium) 
B Sand dunes 
C Glacial drift (Wisconsin stage) ra 
D Altamont moraine and older glacial drift Quaternary 
Throug the region west of the Altamont moraine there are scattered i agenengg of 
glacial en indicating that an earlier (pre-Wisconsin) ice sheet covered this 
Underlying rocks 
Thickness 
in feet 
E Sandstone and shale with beds of lignite —. ba formation) 200. Tertiary 
F Sandstone and shale (Cannonball marine me of Lance formation) 200 | Tertiary (?) 
G Sandstone and shale (lower part of Lane Spread 450f ache Se 
47) 474 
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Scale 
Approximately 8 soildl to | inch 
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Pe ee 
OT, SASS, OE, Fae 
y) Contour interval 200 feet 
of” E ABOVE MEAN SEA LEVEL 
on ji St. Paul, Minnesota. h 10 
i) 
% The crossties on the railroads are spaced | mile apart 46° 
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ior 
3 
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Gs. £6 me & U-S-GEOQLOGICAL SUEY 
