Prehistoric Copper Mining
The earliest known metalworking in North America is believed to be when native peoples started mining copper on the Keweenaw Peninsula section of the Upper Peninsula of Michigan.
| Links | https://www.nps.gov/kewe/learn/historyculture/copper-mining-timeline.htm · https://www.youtube.com/watch?v=GASQhywyKX0 |
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 | Prehistoric Copper Mining in the Lake Superior Region (A Collection of Reference Articles) | Paperback |
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