BULLETIN 611 
SHEET No. 6 
100° 99°30” NORTH DAKOTA 
GEOLOGIC AND TOPOGRAPHIC MAP 
OF THE Scale 500,000 
NORTHERN PACIFIC ROUTE {6 
ES ae ee EEN ar ros a Milos 
From St. Paul, Minnesota, to Seattle, Washington. 19 to aaa 
Base compiled from United States Geological Survey Atlas pane psepabritag pe ea igurfieg © LEVEL 
Sheets, from railro: ments and profiles supplied by : 
Northern Pacific Railway Company and from oe “ies uhebins axmwaer 
information collected with the assistance of this company ee ne 
UNITED STATES GEOLOGICAL SURVEY 
GEORGE OTIS SMITH, DIRECTOR 
David White, Chief Geologist 
wu feu 
R. B. Marshall, Chief Geographer 
1915 
Fach 
h he map witha in p hesis in the 
lower left corner is mapped in detail on the U. S. G. S. Topographic 
Sheet of that name. 
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9 
N Glacial Ot le 
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SEE 2 
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2 
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2 
3 
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y 3 
Glacial drift east of and including the Altamont moraine was 
deposited at the last or Wisconsin stage of glaciation 
EOLOSICAL SURVEY 
