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December 27 @ 1:20 am
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Geologic Mapping of the Grand Canyon
Geologic Mapping of the Grand Canyon
Sunday, January 12, 2 p.m., in the Branigar/Chase Discovery Center Auditorium Join us for an exploration of the U.S. Geological Survey's long and fascinating history of geologic mapping in the Grand Canyon region. Ryan Crow, PhD, of the USGS will share the story of retired geologist George Billingsley, whose extensive work resulted in more than ...