What did early Americans mine along Lake Superior?

Copper.

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  1. Diamonds
  2. Oil
  3. Copper ✔

Why: Early Americans mined large quantities of copper along Lake Superior's Keweenaw Peninsula.

Huh, didn't know that: Early Americans mined large quantities of copper along Lake Superior's Keweenaw Peninsula.

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That copper story has a nice ring.
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References

Answer: Copper. Early Americans mined large quantities of copper along Lake Superior's Keweenaw Peninsula.

  1. Mining en.wikipedia.org/wiki/Mining
    early Americans mined large quantities of copper along Lake Superior's Keweenaw Peninsula
    Checked 2026-11-07.

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