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100 Years of Grand: The Grand Canyon Centennial Project

A digital archive celebrating the Centennial of the Grand Canyon National Park. A collaborative project of the Arizona State University Library, Cline Library, Northern Arizona University and the Grand Canyon National Park. Additional materials are available via the project website.

Excerpt on the Archean Ripple Mark in the Grand Canyon.

Maxon, John H., Campbell, Ian, American Journal of Science
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