Category:Silver-copper mass (Mesoproterozoic; Central Mine, Ontonagon County, Michigan)

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Media in category "Silver-copper mass (Mesoproterozoic; Central Mine, Ontonagon County, Michigan)"

The following 2 files are in this category, out of 2 total.

Silver-copper mass (Mesoproterozoic, 1.05-1.06 Ga; Central Mine, Ontonagon County, Upper Peninsula of Michigan, USA) 1 (17084746629).jpg 2,080 × 1,465; 2.58 MB
Silver-copper mass (Mesoproterozoic, 1.05-1.06 Ga; Central Mine, Ontonagon County, Upper Peninsula of Michigan, USA) 3 (17269157912).jpg 2,435 × 1,897; 3.56 MB

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