Global ETD Search
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Showing 1 to 7 of 7 for “"Paleopedology."”.
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PALEOPEDOLOGY AND PALEOGEOMORPHOLOGY OF THE EARLY OLIGOCENE ORELLA AND WHITNEY MEMBERS, BRULE FORMATION, WHITE RIVER GROUP, TOADSTOOL GEOLOGIC PARK, NEBRASKA
Understanding local and regional reactions to the global Eocene-Oligocene climate 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 …
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Local variability in early Oligocene paleosols as a result of ancient soil catenary processes, Brule Formation, Toadstool Park, Nebraska
Paleopedology is often employed in paleoenvironmental reconstructions because the features of paleosols are affected by changes in climate, ecology, topography, and lithology over time. These changes cause small-scale variations in the morphology and apparent development of paleosols and influence …
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Miocene paleoenvironments and paleosol pH proxies.
… Using sedimentology, stratigraphy, and paleopedology, the depositional environments at Coffee Ranch were reconstructed as a fluvial system with seasonally-variable discharge, alluvial paleosols with seasonal water deficit, and intermittent eolian deposits. Climate state was constrained …
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Paleoclimate and paleoecology of Miocene Eastern African primate habitats : a multiproxy approach.
… integrating it with stratigraphy, sedimentology, paleopedology, geochemistry, phytolith analyses, and vertebrate paleontology to refine environmental reconstructions at two key western Kenya localities: Early Miocene Koru 16 site of the Tinderet complex and Middle Miocene deposits of the Nyakach …
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Late Mississippian (Chesterian) high-frequency climate change in the Pennington Formation at Pound Gap, KY USA.
Climate during the Late Mississippian (Late Chesterian) in the southern Appalachian Basin was characterized by periods of aridity and humidity. The Pennington Formation, exposed at Pound Gap, KY, USA records these changing climatic conditions. The climate signal, however, is partially obscured by …
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Fluvial sequence stratigraphy and paleoclimate of the Upper Triassic (Norian-Rhaetian) Chinle Strata, northern New Mexico.
Two age-equivalent Upper Triassic (Norian and Rhaetian) fluvial successions in New Mexico were evaluated from a sequence-stratigraphic and paleopedologic perspective. Meter-scale fining-upward fluvial aggradation cycles (FACs) comprise fluvial aggradational cycle sets (FACSETs) 4-15 m thick. …
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Paleosols as Holocene proxy climate indicators, McLean County, North Dakota
<p> An exposure with 15 buried A-horizons near Douglas Creek, Lake Sakakawea, central North Dakota, has provided an excellent opportunity for paleoclimate reconstruction. Analyses included texture, stable carbon, radiocarbon, pollen, and phytoliths. The variations in these properties between …