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  • Delaware Copper Mine WELCOME TO DELAWARE MINE

    If you have time to see only one attraction in the Keweenaw, make sure it's the Delaware Mine. We are the area's most family-friendly attraction, and we feature ...

  • Copper extraction Wikipedia

    Copper extraction refers to the methods used to obtaining copper from its ores. ... The world's oldest known copper mine, as opposed to usage of surface deposits, ...

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