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Smithsonian National Museum of Natural History
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Department of Mineral Sciences

Izalco Volcano

Ore Collection

Ore Collection

A large leaf of vein copper from the White Pine Mine in Ontonagon County, Michigan. This specimen is from the stratified sedimentary rock deposit called the Nonesuch Shale that formed during the late Keweenawan age (18¾ x 9½ x 6¼") [NMNH 116392].

Photography by Ken Larsen.

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