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The most recent rocks of the grand canyon formed during which geological period?​

The most recent rocks of the grand canyon formed during which geological period?​
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The most recent rocks of the grand canyon formed during which geological period?​

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User Yly
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The canyon itself has formed much more recently than the deposition of rock layers, only about 5 million years ago (as opposed to the rocks, the youngest of which are a little less than300 million years old).
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User Pierce Darragh
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