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The Porcupine Mountains were able to formed, even though not even close to any tectonic plates, because of ancient, hard volcanic basalt that was uplifted. The ridges are pieces of once-towering mountains. The Porcupine Mountains were also formed by glaciers during the ice age.

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12y ago
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9y ago

Porcupine Mountains was created in 1945.

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Q: When was Porcupine Mountains created?
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