Figure 12. Exposure of Seabee Formation overlain by Tuluvak Formation along Colville River at base of Umiat Mountain, central Umiat quadrangle. The Seabee Formation extends from river level more than halfway up to prominent sandstone at base of Tuluvak Formation; contact is shown by yellow dashed line. Note yellow tuff beds within Seabee. Bluff has approximately 400 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
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