How Old is the Grand Canyon ? America (USA)

 How Old is the Grand Canyon ?

around 70 million years

It's young! It's incredibly old! It's not as old as you think! In any case, now a paper in Nature Geoscience offers a conceivable trade off: Yes, the Colorado River has been cutting the Grand Canyon for just 6 million years, however it is coursing through canyons that go back around 70 million years.


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