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FIGURE 2. Generalized geological section of Chinle Formation exposures in Petrified Forest National Park showing the relative stratigraphic positions of the specimens (modified from Irmis and Parker, 2005).
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FIGURE 2. Generalized geological section of Chinle Formation exposures in Petrified Forest National Park showing the relative stratigraphic positions of the specimens (modified from Irmis and Parker, 2005).
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