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首页> 外文期刊>Geosciences >Response of Soils and Soil Ecosystems to the Pennsylvanian–Permian Climate Transition in the Upper Fluvial Plain of the Dunkard Basin, Southeastern Ohio, USA
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Response of Soils and Soil Ecosystems to the Pennsylvanian–Permian Climate Transition in the Upper Fluvial Plain of the Dunkard Basin, Southeastern Ohio, USA

机译：美国俄亥俄州东南部敦刻德盆地上河流平原土壤和土壤生态系统对宾夕法尼亚-二叠纪气候转变的响应

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Direct exposure of paleosols to the atmosphere during formation make them ideal for reconstructing paleoclimate. Paleosol and ichnofossil properties are dependently linked making it important to study them in tandem, to avoid errors in interpretation. Small scale studies (1 km) yield high resolution data that can be used to assess allogenic processes through comparison of spatial and temporal trends. This study used field and laboratory analyses to gather data from Late Pennsylvanian to Early Permian Upper Monongahela and Lower Dunkard group paleosols on Ohio Route 33 in Meigs County, OH, USA. The physical and geochemical properties of the paleosols from the field sites indicate that channel migration was the primary control on paleosol formation in the study area, however, a clear climate signal was observed. The change in paleosol type and calculated mean annual precipitation (MAP) values indicate that the climate became more strongly seasonal and drier over the course of the Pennsylvanian–Permian transition with a temporary excursion to a more ever-wet climate with higher MAP, marked by the occurrence of the Waynesburg Coal at the Pennsylvanian–Permian boundary.
机译：在形成过程中古土壤直接暴露于大气中，使其成为重建古气候的理想选择。古土壤和鱼类化石的属性是相互依存的，因此一前一后地研究它们很重要，以避免解释上的错误。小规模研究（<1 km）产生高分辨率数据，可用于通过比较时空趋势来评估同种异体过程。这项研究使用野外和实验室分析来收集美国俄亥俄州迈格斯县33号公路上宾夕法尼亚州晚期至二叠纪早期Monongahela上，下敦刻尔组古土壤的数据。田间地点的古土壤的物理和地球化学性质表明，通道迁移是研究区域古土壤形成的主要控制因素，但是观察到了清晰的气候信号。古土壤类型的变化和计算出的年平均降水量（MAP）值表明，在宾夕法尼亚州-二叠纪过渡过程中，气候变得更加强烈，季节性和干燥，出现了短暂的漂移，向更高湿润的气候过渡，MAP较高，标记为Waynesburg煤在宾夕法尼亚-二叠纪边界的发生。

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