CGRG Bibliography of Canadian Geomorphology
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Author : Anderson, T.W.; and Lewis, C.F.M.
Date : 1985
Title : Postglacial water-level history of the Lake Ontario basin
Publication : Quaternary Evolution of the Great Lakes. Edited by: P.F. Karrow and P.E. Clakin. Geological Association of Canada, Special Paper
Issue : 30:
Page(s) : 231-253



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Abstract

Plant and insect remains, molluscs, and ostracodes contained in stratified sand and silt overlying laminated clay provide evidence of extremely low lake levels in Lake Ontario following the draining of glacial Lake Iroquois and the expansion of post-Iroquois glacial lakes into the Ottawa and upper St. Lawrence valleys, at 11 400 BP. Once the lake levels separated from the Champlain Sea, Early Lake Ontario water levels rose rapidly with steadily diminishing rates as the outlet area rebounded isostatically. The drainage history of the Ontario basin, shown in a set of maps of former shoreline positions at 12 000 BP (Lake Iroquois), 11 400, 10 000, 8000, 6000, and 4000 BP, is reconstructed from paleowater-planes defined in a shoreline displacement diagram, from shallow-water sediment occurrences, profiles of interpreted relative lake-level change, and predicted outlet-uplift histories

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Bibliography of Canadian Geomorphology