Early Postglacial Environment of a Small Kettle in Mercer County, Ohio
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Citation:The Ohio Journal of Science. v70 n5 (September, 1970), 310-314
Excavation of a series of pits in a filled kettle at St. Charles Seminary, in southeastern Mercer County, revealed nine to twelve feet of lacustrine silty-clay sediments above clayrich till. Near the bottom, in the middle of the kettle, the sediments were mostly clays, and contained organic material. Fragments of Picea (spruce) and a few specimens of the mollusks, Helisoma anceps striatum, Gyraulus altissimus, and Amnicola limosa, from the bottom imply an open kettle (lake) in a boreal climate at this time of initial sedimentation. Sediments immediately above this level contained Thuja (northern white cedar), which could indicate either boreal or somewhat less cold conditions. Strata higher in the section were more silty and contained some seepage, but lacked any organic material. Soils of the Montgomery series have developed in the fill of the kettle; soils in the surrounding ground moraine are in the Blount and Morley series.
Author Institution: Soil Conservation Service, Defiance, Ohio and Bowling Green State University, Bowling Green, Ohio
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