How Old is the Grand Canyon? (4 of 4) (IMAGE)

American Association for the Advancement of Science (AAAS)

How Old is the Grand Canyon? (4 of 4)

Caption

Redwall Caverns, a large grotto in the Redwall Limestone in Marble Canyon, eastern Grand Canyon. This image relates a study by Dr. Victor Polyak and colleagues at University of New Mexico in Albuquerque, N.M., titled "Age and Evolution of Grand Canyon Revealed by U-Pb Dating of Water Table-Type Speleothems." The article appeared in the March 7, 2008, issue of the journal Science, published by AAAS.

Credit

Image courtesy of Victor Polyak

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