How long did it take for the Grand Canyon to form?



  1. 0 Votes

    This website has a great timeline for the formation of the Canyon and the layers of rock inside it. There are several theories about how the Canyon was formed, including:
    -The Colorado River began cutting it when it was formed, ~20 million years ago
    -~17 mil. years ago the Colorado Plateau begins to uplift and causes the river to cut deeper.

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