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Petrified Forest National Park, Arizona; Clays capped by conglomeratic sandstone, the logs occur in the sandstone. 1905. Plate 8-A in U.S. Geological Survey. Bulletin 435. 1910.
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Tertiary limestone in part of conglomeratic, Hualpai wash. Coconino County, Arizona. 1905. Plate 13-B in U.S. Geological Survey. Bulletin 435. 1910.


    map background search result map search result map Petrified Forest National Park, Arizona; Clays capped by conglomeratic sandstone, the logs occur in the sandstone. 1905. Petrified Forest National Park, Arizona; Clays capped by conglomeratic sandstone, the logs occur in the sandstone. 1905.