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Showing 1 to 5 of 5 for “"White River Group"”.
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White River Group diagenesis
… characteristics of paleofluids in the White River Group played a vital role in controlling zeolitic alteration as well as the formation of calcretes. The White River Group is a terrestrially deposited sequence of mid-Tertiary age in the northern Rocky Mountains and Great Plains of North …
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PALEOPEDOLOGY AND PALEOGEOMORPHOLOGY OF THE EARLY OLIGOCENE ORELLA AND WHITNEY MEMBERS, BRULE FORMATION, WHITE RIVER GROUP, TOADSTOOL GEOLOGIC PARK, NEBRASKA
… transition is a continuing challenge. The White River Group in the North American midcontinent preserves dynamic fluvial, volcaniclastic and lacustrine facies that yield to aeolianites. To test whether this shift in sedimentation style was driven by climate change, 20 paleosols from 8 …
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Hydrogeological controls of uranium and arsenic mobility in groundwater of the Pine Ridge Reservation, South Dakota
… due to volcanic ash deposits emplaced into the White River Group, which unconformably underlies the Arikaree Group. Groundwater samples were obtained for over 250 wellbores through collaboration with the Oglala Sioux Tribe and Indian Health Service. Cluster analysis was used to delineate …
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Stratigraphy and sedimentary history of middle Cenozoic (Oligocene and Miocene) deposits in North Dakota
… South Dakota and western Nebraska where the White River Group constitutes a fairly complete Oligocene record, and the Arikaree Group of early Miocene age is commonly the sole remaining record of that epoch. Isolated outcrops in adjacent states also offer opportunities for studying the middle …
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Paleopedology And taphonomy Of The Brian Maebius Site, Badlands National Park, South Dakota
… Member of the Oligocene Brule Formation of the White River Group. The Site is a collection of fluvially reworked volcaniclastic and epiclastic sediments of mudstones, channel sandstones, siltstones, and vertebrate fossils. Macroscopic, microscopic, and geochemical data that I collected at Brian …