"Geological Map of the Lake Superior Land District in the State of Michigan", U.S. Government

A striking hand colored map showing the geology of Upper Michigan Peninsula, Isle Royale and the north shore of Lake Superior. Indicates copper, iron, silver, marble furnaces, iron forages and active/inactive mines. Prepared by J.W. Foster & J.D. Whitney pursuant an Act of Congress approved March 1, 1847 entitled "Act to establish a new land District for the sale of mineral lands in the State of Michigan. Color code explanation upper right.

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Condition: A

Professionally backed with Japanese tissue with a tear repaired upper left. A handsome map with fancy titling and fine color.