Visit to the Adventure Mine, Keweenaw peninsula #Michigan, USA. 1.1 billion year old basalt flows that carry pure #copper. We experienced an underground blast from a safe distance around the corner! #geology #mining
Visit to the Adventure Mine, Keweenaw peninsula #Michigan, USA. 1.1 billion year old basalt flows that carry pure #copper. We experienced an underground blast from a safe distance around the corner! #geology #mining
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