2010 GSA Annual Meeting Field Trip #425

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FT425
Blackhawk Formation to Castlegate Sandstone stratigraphic interval, Coal Canyon. Overall progradational succession from marine mudstones and heterolithics at the base of the cliff section, passing upwards into thick bedded shallow marine sandstones, which in turn are overlain by channel and coastal plain deposits, marked by prominent coal beds. Photo © S.A.J. Pattison.
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