Figure 26. Exposures of nearly horizontal Prince Creek Formation forming bluff on west side of the Colville River near confluence with the Anaktuvuk River, Umiat quadrangle. Light-colored strata are mostly nonmarine sandstones, and dark-colored strata are carbonaceous mudstones and coal. Bluff has approximately 300 ft of relief. View to north. These strata are typical exposures for the lower part of the Prince Creek Formation. Photograph by D.W. Houseknecht.
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U.S. Department of the Interior, U.S. Geological Survey
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