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Shallow-marine sandstone in upper part of Schrader Bluff Formation at Shivugak Bluff showing lag of marine shells in a hummocky cross-stratified facies

Figure 23. Shallow-marine sandstone in upper part of Schrader Bluff Formation at Shivugak Bluff showing lag of marine shells in a hummocky cross-stratified facies. White ovals just beneath pen are likely Schaubcylindrichnus trace fossils. 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/fig23.html
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