THE 8K EVENT IN NORTHEAST OHIO

Many Northern Hemisphere paleoclimatic records, including ice cores, speleothems, lake cores and glacier chronologies, indicate an abrupt cooling event about 8200 cal yr BP. A new well-dated series of sediment cores taken from a Brown's Lake, a kettle in Northeast Ohio shows two closely spaced intervals of loess deposition during this time period. The source of loess is uncertain, however it is likely a sensitive site because of an abandoned drainage and former glacial lake basin located to the north of the stagnate ice complex that hosts the kettle lake. Strong visual stratigraphy, loss on ignition data, and sediment grain size analyses dated with 3 AMS radiocarbon dates place the two intervals of loess deposition between 8950 and 8005 cal yr BP. The possibility of a two-phase abrupt climate change at this time is a finding that has been suggested in other research. This record adds detail to the spatial extent and timing as well as possible structure of the 8200 abrupt climate change event in Ohio.