Geological map of the Clear Lake District

Relief shown by hachures. Depths shown by contours. Oriented with north toward the upper left. "Geo. F. Becker, Geologist in charge." "Monograph XIII, Atlas sheet III."

Geological Survey (U.S.); Hoffmann, C. F. (Charles Frederick), 1838-1913.

1885

Washington, D.C. : U.S. Geological Survey

1:95 040

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