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TitleSurficial geology, Elbow Lake, Manitoba, NTS 63-K/15
AuthorDredge, L A; McMartin, I
SourceGeological Survey of Canada, Canadian Geoscience Map 170, 2014, 1 sheet, (Open Access)
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:50,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 14 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf; rtf; shp; xls; xml; jpg; JPEG2000
AreaElbow Lake; Webb Lake; Cabin Lake; Wood Lake; Claw Lake; Little Claw Lake; Long Lake; Big Rat Lake; Labell Lake; Hootenany Lake
Lat/Long WENS-101.0000 -100.5000 55.0000 54.7500
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; organic deposits; glaciofluvial deposits; tills; sands; gravels; ice flow; flow trajectories; Cenozoic; Quaternary
Illustrationslocation maps
ProgramRegional Geology & Geochemistry, GSC Northern Canada Division
Released2014 01 29
AbstractGlacial sediments comprising lee-side till deposits and a discontinuous till veneer are widespread throughout the area above an elevation of 300 m asl. There, bedrock outcrops and till are interspersed with minor occurrences of Lake Agassiz offshore sediments, and organic deposits. The thickest till accumulations are found on the down-ice side of large bedrock obstructions and in structurally controlled bedrock depressions where thicknesses of 5 m or more may occur. Rare streamlined landforms and till plain have till thicknesses reaching 15 m. Below 300 m asl, mainly in the eastern part of the map area and in some lowlands around Elbow Lake, Lake Agassiz offshore sediments are more pervasive. In areas of high relief, till has undergone extensive washing and reworking during the regression of the post-glacial lake. Widespread nearshore and littoral sand and gravel occur within former glaciofluvial corridors in the northeast. Glacial striations in the Elbow Lake map area record ice flow towards the SSW (mainly ranging between 195°-208°). Age relationships were observed at one site southeast of North Star Lake where an early flow towards 192° preceded an advance towards 156°. These findings are related to the last cycle of glacial advance and retreat of ice originating from the Keewatin Sector to the north. Till sheets related to each of these events have not been recognized in the hand-dug pits or naturally exposed sections in the area. The geoscientific data presented on this map (till samples and ice-flow indicators) were collected as part of the Shield Margin NATMAP Project (Nielsen, 1992; McMartin et al., 1996). Air photo interpretation (1:60 000 scale aerial photographs) and map compilation were completed as part the TGI-3 Flin Flon Project from legacy work in 2012-2013.
Summary(Plain Language Summary, not published)
The Elbow Lake map (NTS 63 K/13) identifies surficial materials and associated landforms left by the retreat of the last glaciers to have covered the area about 10,000 to 9,000 years ago. The surficial geology map is based on aerial photograph interpretation and fieldwork. This work was undertaken to provide new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial materials. This supports informed decision making for resource development and land use, and contributes to effective mineral exploration methods in an area with significant mineral potential.