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Geomorphological History of Massive Parabolic Dunes, Van Buren State Park, Van Buren County, Michigan

机译:密歇根州范布伦县范布伦州立公园的大规模抛物线沙丘的地貌史

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摘要

Lakeshore erosion along eastern Lake Michigan has exposed a series of buried soils in the massive(up to 45 m high) parabolic dunes at Van Buren State Park, Michigan. For this study, soils were mapped and described along a 300 member stretch of the lake shore. The basal soil in the northern part of the study area is a peat layer that gives way southward to a Spodosol Radiocarbon dates indicate that peat accumulation began in a wetland at 6170-5750 cal, yr B.P.(2σ) and ended with a influx of windblown sand at 5470-4880 cal. Yr B.P. The Spodosol was buried at 5890-5618 cal. Yr B.P.
机译:密歇根湖东部沿湖岸的侵蚀使密歇根州范布伦州立公园的巨大(高达45 m高)抛物线沙丘中暴露出一系列埋藏的土壤。在本研究中,沿着湖岸300段的长度绘制并描述了土壤。研究区北部的基层土壤为泥炭层,向南延伸至Spodosol放射性碳年代学表明,泥炭的积累始于BP(2σ)的6170-5750 cal湿地,并以大风吹入结束砂在5470-4880卡路里年B.P. Spodosol埋藏在5890-5618 cal。年B.P.

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