Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

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

Usage Restrictions: 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 Science for permission.