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TitleHydrogeology of the Lake Simcoe basin: a geophysical view of stratigraphy beneath the lake
AuthorLewis, C F MORCID logo; Todd, B JORCID logo; King, J W; Goodyear, D R; Slattery, S R
SourceProceedings of OttawaGeo2007 / OttawaGéo2007, Canadian Geotechnical Conference; 2007 p. 523-530
Alt SeriesEarth Sciences Sector, Contribution Series 20070269
PublisherCanadian Geotechnical Society
MeetingOttawaGeo2007 / OttawaGéo2007, Diamond Jubilee Canadian Geotechnical Conference and the 8th Joint CGS/IAH-CNC Groundwater Conference; Ottawa, Ontario; CA; October 21-24, 2007
NTS31D/03; 31D/04; 31D/05; 31D/06; 31D/11; 31D/12
AreaLake Simcoe
Lat/Long WENS-80.0000 -79.0000 44.7500 44.0000
Subjectshydrogeology; geophysics; surficial geology/geomorphology; basin analysis; basins; hydrologic budget; hydrography; flow regimes; drainage systems; drainage patterns; watersheds; geophysical surveys; seismology; seismic reflection surveys; reflection studies; Holocene; glaciolacustrine deposits; Newmarket Till; Quaternary; Cenozoic
Illustrationslocation maps; seismic profiles; photographs
AbstractSeismostratigraphic analysis of seismic reflection profiles and sediment sampling revealed sequences in Lake Simcoe sediments, that correlate to onshore geological sequences. Soft Holocene mud overlies glaciolacustrine rhythmites of glacial Lake Algonquin which in turn overlie an erosion surface with ridges (drumlins?) composed of Newmarket Till. In many onshore localities, this silty, sand till has been completely eroded by tunnel-channel processes that, in places, incised pre-Newmarket-aged lower glaciolacustrine beds. The seismic data record evidence of subglacial meltwater erosion, an early Holocene lowstand lake phase, and groundwater seepage through glaciolacustrine and postglacial sediments.

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