Island Mine, Isle Royale National Park, Lake Superior, Keweenaw Co., Michigan, USA

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Ref.: U.S.G.S. PP 144

The Island Mine is located in Isle Royale National Park and is unique in that it is the only mine on the island that mined a conglomerate for its copper. Organized in 1874 as the Island Mining Co., the mine only operated 3 years, drilled one shaft, and produced 213,000 lbs. of refined copper. Collecting is prohibited.

Mineral List:

Copper

1 entry listed. 1 valid mineral.

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