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A 10,000 year record of dune activity, dust storms, and severe drought in the central Great Plains
Dune fi elds and loess deposits of the Great Plains of North America contain stratigraphic records of eolian activity that can be used to extend the short observational record of drought. We presentExpand
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Dune-dammed paleovalleys of the Nebraska Sand Hills: Intrinsic versus climatic controls on the accumulation of lake and marsh sediments
Although running water is the dominant geomorphic agent on Earth, eolian processes can gain ascendancy in regions where the climate is arid, vegetation is sparse, and abundant sand is available forExpand
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New Stratigraphic Subdivision, Depositional Environment, and Age Estimate for the Upper Cretaceous Djadokhta Formation, Southern Ulan Nur Basin, Mongolia
Abstract Studies of key and newly discovered sections of the Upper Cretaceous Djadokhta Formation along the southern margin of the Ulan Nur Basin allow a new subdivision based on lithology. TheExpand
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Late-Holocene dune activity linked to hydrological drought, Nebraska Sand Hills, USA
Dunefields of the Great Plains contain stratigraphic records of episodic Holocene aeolian activity, potentially providing a valuable record of climatic change. It has been dif” cult to establishExpand
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Large Wind Shift on the Great Plains During the Medieval Warm Period
Spring-summer winds from the south move moist air from the Gulf of Mexico to the Great Plains. Rainfall in the growing season sustains prairie grasses that keep large dunes in the Nebraska Sand HillsExpand
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Optical and radiocarbon ages of stacked paleosols and dune sands in the Nebraska Sand Hills, USA
Abstract Optical ages for eolian sands from the Nebraska Sand Hills indicate periods of extensive eolian activity at ca 115±25, 840±70, 2300±240, and 3560±340 a. Activity was also noted at singleExpand
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Thinking Like a Dune Field: Geologic History in the Nebraska Sand Hills
The Nebraska Sand Hills region is a giant dune field that is presently stabilized by prairie vegetation. During numerous severe droughts within the last 15,000 years, the dunes have lost their plantExpand
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Long‐Lived Pluvial Episodes during Deposition of the Navajo Sandstone
The Navajo Sandstone of the American Southwest was deposited at approximately 190 Ma in a giant, subtropical dune field near the western margin of Pangea. From this unit, we report thick intervals ofExpand
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Ichnofacies of an Ancient Erg: A Climatically Influenced Trace Fossil Association in the Jurassic Navajo Sandstone, Southern Utah, USA
SUMMARY: Arid eolian environments usually exhibit a paucity of organism traces, but some eolianite facies in the geologic record contain a great abundance of trace fossils, which characterize aExpand
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The Geology of Ukhaa Tolgod (Djadokhta Formation, Upper Cretaceous, Nemegt Basin, Mongolia)
Abstract The lithostratigrahy and sedimentology of the fossiliferous Upper Cretaceous strata exposed in the Gobi Desert of Mongolia at Ukhaa Tolgod are described and mapped on aerial photos.Expand
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