copper mining in s ancient copper mining in lake superior area

  • Copper mining in Michigan

    Copper mining in the Upper Peninsula boomed and from 1845 until 1887 (when it was exceeded by Butte Montana) the Michigan Copper Country was the nation's leading producer of copper. In most years from 1850 through 1881 Michigan produced more than threequarters of the nation's copper and in 1869 produced more than 95% of the country's copper.

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  • Lake Superior's ancient copper mining mystery

    Lake Superior copper has been found as far west as the Rocky Mountains as far north as the Arctic and as far south as Louisiana. The regions copper was almost entirely pure making preindustrial extraction possible. The ancient miners dug around 5 000 pits some with fivemetre deep shafts that included some tunnelling.

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  • Copper A World Trade in 3000 BC? Eye Of The Psychic

    The era around 3000 BC saw more than 500 000 tons of copper being mined in the socalled Upper Peninsula in the American state of Michigan. The largest mine was on Isle Royale an island in Lake Superior near the Canadian border. Here there are thousands of prehistoric copper pits dug thousands of years ago by ancient peoples unknown.

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  • Miners Left a Pollution Trail in the Great Lakes 6000

    Miners Left a Pollution Trail in the Great Lakes 6000 Years Ago . Scientists find evidence of ancient copper mining in polluted lake sediments from Isle Royale National Park.

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  • Timeline of Michigan Copper Mining Prehistory to 1850

    Partial serpent artifact made of Lake Superior copper found at Effigy Mounds National Monument Iowa. NPS Photo. 7 000 years ago The earliest known metalworking in North America begins when Native peoples start mining copper on the Keweenaw Peninsula.

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  • Copper Mines in Ancient North America Expanded Perspectives

    It is not clear who these ancient miners were but we do know that the mining abruptly ended in 1 200 BC. This conveniently coincides with the end of the Bronze Age in Europe. The copper located in the Lake Superior area is some of the purest copper in the world yet less than 1% has been discovered in America.

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