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Strikingly orange-tinted flow of the Colorado River in Granite Gorge

By Geology, Minerals, Energy, and Geophysics Science Center August 2008 (approx.)
Aerial view of a strongly discolored river in a deep and rugged canyon. Blue sky and scattered clouds above the canyon
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Detailed Description

Summer flash-floods can introduce large amounts, of fine reddish-orange sediment to the Colorado River with spectacular results

Sources/Usage

Public Domain.