How Old is the Grand Canyon? (2 of 4) (IMAGE)

American Association for the Advancement of Science (AAAS)

How Old is the Grand Canyon? (2 of 4)

Caption

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

Credit

Image courtesy of Victor Polyak

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Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact <i>Science</I> for permission.

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