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Morphology and Sediments of the Nebraska Sand Hills in Relation to Pleistocene Winds and the Development of Aeolian Bedforms

Previous interpretations of palaeowind directions during the formation of the Sand Hills are at variance with interpretations based on other evidence. Wilson's model of bedforms is used to interpret the steep-face orientations, dune volume distribution patterns and dune hypsometry of the megadunes together with their sand grain-size characteristics and observations of their dune bedding. It is concluded that northwesterly winds predominated but that there were also important southwesterly winds at the time of megadune growth, and that these encouraged the growth of the lengthy linear megadunes.