Geological map of Keweenaw Point, Lake Superior, Michigan / by J. W. Foster & J. D. Whitney S. W. Hill and W. Schlatter, assistants.
Relief shown by spot heights and hachures; depths shown by soundings.; Shows mineral lands, mines, and furnaces.; Appears in: Jackson, Charles T. Report of the geological and mineralogical survey of the mineral lands of the United States in the state of Michigan. Washington, 1849. between p. 624 and 625.
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