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Grand Canyon Still Grand but Older
By dating mineral deposits inside caves along the canyon’s walls, geologists now claim the canyon’s formation began 11 million years earlier than previous estimates.
By dating mineral deposits inside caves along the canyon’s walls, geologists now claim the canyon’s formation began 11 million years earlier than previous estimates.
Source: NYT
Posted on: Friday, Mar 07, 2008, 8:12am
Views: 1287
Posted on: Friday, Mar 07, 2008, 8:12am
Views: 1287
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