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| Cross section for geologic map. See a legend for the geologic map of the Grand Canyon in the South Rim and Phantom Ranch area. Map, cross sections, and legend information from Billingsley, George H., 2000, Geologic Map of the Grand Canyon 30' x 60' Quadrangle, Coconino and Mohave Counties, Arizona: U.S. Geological Survey Geologic Investigation Series Map I-2688, scale 1:100,000; http://pubs.usgs.gov/imap/i-2688/. |
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