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Mosquito Creek/Pymatuning Lowlands

Ecoregion in OH, PA

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The glaciated Mosquito Creek-Pymatuning Lowlands (61b) has nearly level to undulating terrain. It is characterized by poorly drained terrain caused by low relief, clayey substrate, and fragipans. The soils are mostly Alfisols (Fragiaqualfs, Fragiudalfs) and the substrate is primarily clayey Hiram till of late-Wisconsinan age with some glacial outwash, alluvial, and lacustrine deposits. Numerous wetlands and broad, flat-bottomed valleys occur on the silt and silty clayey loams. Low-gradient streams are common, have few riffles, and lack associated stream organisms. Crestal elevations vary from about 900 to 1,300 feet (274-396 m) and local relief is usually less than 150 feet (46 m).

— EPA

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