Geologic map of the Coburn Mountain quadrangle, Lewis and Clark and Cascade Counties, Montana
By: Department of the Interior, United States Geological Survey ; by Robert George Schmidt.
Contributors: Schmidt, Robert George.
Series: Geologic quadrangle map -- GQ-975.
Publisher: The Survey
Place of publication: Reston, Va
Format: Map
Subjects: Geology -- Montana -- Lewis and Clark County -- Maps.; Geology -- Montana -- Cascade County -- Maps.
Genres: Maps.
Other titles: Coburn Mountain quadrangle, Lewis and Clark and Cascade Counties, Montana, geologic map.
Notes: Relief shown by contours and spot heights.

"Geology by R.G. Schmidt, 1961-62...."

Includes 2 col. cross sections, bibliography, index showing quadrangle location, and quadrangle map.