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copper

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Coby Schumm

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2y ago
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9y ago

The Upper Peninsula supplied 90% of America's copper by the 1860s. It was the largest supplier of iron ore by the 1890s, and production continued to a peak in the 1920s, but sharply declined shortly afterward. The last copper mine closed in 1995, although the majority of mines had closed decades before.

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7y ago

copper

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Q: What element used to be mined in the upper peninsula of Michigan-?
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