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Exposure of upper part of Schrader Bluff Formation at Shivugak Bluff, along Colville River east of Umiat

Figure 21. Exposure of upper part of Schrader Bluff Formation at Shivugak Bluff, along Colville River east of Umiat. Strata consist of resistant sandstones, mostly of shallow-marine origin, interbedded with mudstone, tuffaceous sandstone, tuff, and bentonite. Bluff has approximately 300 ft of relief. View to north. Photograph by D.W. Houseknecht.

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U.S. Department of the Interior, U.S. Geological Survey
URL: https://pubs.usgs.gov/pp/p1673/thumbnails/fig21.html
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