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How long did it take for the grand canyon to form?
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How long did it take for the grand canyon to form?

User Andy Hin
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Beginning about 17 million years ago, the mountain range that fed the ancient northeast river system was destroyed by faulting, as the Basin and Range was created southwest of Grand Canyon.

User Lars Steen
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Answer:around 17 million years ago

User Damian Polac
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