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TitleSurficial geology of north-central Manitoba
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKlassen, R W
SourceGeological Survey of Canada, Memoir 419, 1986, 63 pages (2 sheets), Open Access logo Open Access
PublisherGeological Survey of Canada
MapsPublication contains 1 map
Map Info.surficial geology, surficial geology, 1:500,000
ProjectionTransverse Mercator Projection
Mediapaper; on-line; digital
RelatedThis publication is contained in A trans-jurisdiction database of till composition across the Circum-Kisseynew area, Manitoba and Saskatchewan
RelatedThis publication contains Surficial geology, north-central Manitoba
File formatpdf; xls
NTS53B; 53C; 53D; 53E; 53F; 53G; 53J; 53K; 53L; 53M; 53N; 53O; 54B; 54C; 54D; 54E; 54F; 54G; 54J; 54K; 54L; 54M; 54N; 54O; 63A; 63B; 63C; 63F; 63G; 63H; 63J; 63I; 63K; 63N; 63O; 63P; 64A; 64B; 64C; 64F; 64G; 64H; 64I; 64J; 64K; 64N; 64O; 64P
AreaCanadian Shield; Hudson Bay Lowlands
Lat/Long WENS-102.0000 -90.0000 60.0000 52.0000
Subjectspaleontology; geochronology; stratigraphy; surficial geology/geomorphology; glacial deposits; glaciation; tills; wisconsinian glacial stage; deglaciation; glaciolacustrine deposits; glaciofluvial deposits; lacustrine deposits; alluvial deposits; marine deposits; peat; stratigraphic correlations; permafrost; pleistocene; radiocarbon dates; fossils; moraines; Churchill River Group; Tyrrell Sea; Glacial Lake Agassiz; Missinaibi Formation; Moose River Basin; Wigham Creek Formation; Amery Formation; Pollen; Quaternary; Cenozoic; Precambrian
Released1987 01 01; 2012 11 13
AbstractThe study area is largely within the Precambrian Shield but includes part of Hudson Bay Lowland and Manitoba Plain. Boreal forest masks and is interspersed with wetlands that cover most of the nearly flat, to gently hilly, drift veneered bedrock. A record of glaciations is preserved in the thick drift of Hudson Bay Lowland. The oldest till (Amery Formation) underlies intertill sediments rich in pollen (Gods River sediments) that are correlated with the interglacial (Sangamonian?) Missinaibi Formation of the Moose River Basin, Ontario. Three tills and intertill sediments (Wigwam Creek Formation) overlying the Gods River sediments are considered to be deposits of Wisconsinan stades and interstades. Final deglaciation began in the southwest part of the region about 9500 years ago and ended about 7500 years ago when the Tyrrell Sea covered the Lowland. Lake Agassiz inundated essentially all parts of the region during various phases of deglaciation and was finally drained when it breached the glacial ice dam shortly before the sea entered the northwestern part of Hudson Bay Lowland. Glaciolacustrine clay and silt blanket much of the former main basin of Lake Agassiz. Patchy veneers of clay and silt on the till plains to the northeast and east of the main basin were also deposited in Lake Agassiz, although some lacustrine sediments are postglacial deposits. A prominent system of kame moraines (Burntwood-Etawney) formed between and along the Keewatin ice lobe over the western part of the region and the Hudson lobe over the eastern part. Bog and fen began developing over northern Manitoba about 6500 years ago.

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