(STRE29) Canyon width as a function of rock resistance, Colorado River, Grand Canyon National Park, AZ photo

Doug Sherman | all galleries >> Geology >> Streams > (STRE29) Canyon width as a function of rock resistance, Colorado River, Grand Canyon National Park, AZ

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14-MAR-2008

(STRE29) Canyon width as a function of rock resistance, Colorado River, Grand Canyon National Park, AZ

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