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This site provides a brief discussion of trace fossils, the Dakota Sandstone, the ichnofacies within this unit and the environments these strata record. Photos and illustrations of Ophiomorpha trace fossils, outcrop photos, and explanations of the figures are provided. Other topics include the Western Interior Seaway, Mancos Shale, Thalasinoides and burrows.
Subject: Geoscience:Oceanography, Geology Focus on the Cretaceous: Sea Level, Stratigraphy, Paleogeography, Paleontology Topics: Earth surface, Ocean, Biosphere
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