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5. Geological map of Keweenaw Point, Lake Superior. Image University of Michigan Public content

1847. Jackson, Charles T. (Charles Thomas), 1805-1880. 1 map: col.; 34 x 56 cm. This map is in the public domain. Please attribute access and use of this digitized map to the Stephen S. Clark Library, U...

6. Geological map of Keweenaw Point, Lake Superior, Michigan; by J. W. Foster & J. D. Whitney; S. W. Hill and W. Schlatter, assistants. Image University of Michigan Public content

1849. Foster, J. W. (John Wells), 1815-1873.,Whitney, J. D. (Josiah Dwight), 1819-1896.,Hill, S. W. (Samuel Worth), 1815-1889.,Schlatter, Wm. (William),P.S. Duval & Co. Relief shown by spot heights and hachures; depths shown by soundings. Shows mineral lands, mines, and furnaces. Appears in: Jackson, Charles T. Rep...