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TitleSurficial geology, Walker Lake south, Nunavut, NTS 56-J south
DownloadDownloads
AuthorDredge, L A; Campbell, J E; McMartin, I
SourceGeological Survey of Canada, Canadian Geoscience Map 151, 2015, 1 sheet, https://doi.org/10.4095/297243
Year2015
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:100,000
ProjectionUniversal Transverse Mercator Projection, zone 15 (NAD83)
Mediaon-line; digital
RelatedThis publication is superceded by Dredge, L A; Campbell, J E; McMartin, I; (2016). Surficial geology, Walker Lake south, Nunavut, NTS 56-J south, Geological Survey of Canada, Canadian Geoscience Map no. 151, ed. 2, Prelim.
File formatreadme
File formatpdf; rtf; shp; xml; jpg; xls
ProvinceNunavut
NTS56J/01; 56J/02; 56J/03; 56J/04; 56J/05; 56J/06; 56J/07; 56J/08
AreaWalker Lake
Lat/Long WENS -92.0833 -90.0000 66.5000 66.0000
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; moraines; glaciofluvial deposits; glaciolacustrine deposits; alluvial deposits; organic deposits; eolian deposits; lacustrine deposits; marine deposits; ice flow; flow trajectories; Cenozoic; Quaternary
Illustrationslocation maps
ProgramRae Province, Tehery-Wager Bay, GEM2: Geo-mapping for Energy and Minerals
Image
Released2015 11 18
AbstractMuch of the Walker Lake South map area is covered by streamlined till plains with shallow glacially-eroded basins; however the southeast is dominated by a bedrock highland. Striae and streamlined landforms in till indicate initial north-northeast then persistent northwestward ice flow during the last glaciation, although late-glacial flow reversals occurred to the south and east down glacial troughs in the bedrock highland. Weathered bedrock and regotill indicate areas of cold-based ice conditions and combined with the hummocky till, delineate the presence of late-ice remnants in highlands. Large subglacial corridors containing eskers and other ice-contact deposits carried meltwater northward into the Arctic Ocean. South of the regional drainage divide, short-lived glacial lakes, marked by wave-cut notches and boulder lags on the till surface, developed as the ice front receded southwards into the upland south of the Ford Lake-Wager Bay lowlands. The marine limit ranges from 100-110 m a.s.l. in this area.
Summary(Plain Language Summary, not published)
The Walker Lake map (NTS 56J) identifies surficial materials and associated landforms left by the retreat of the last glaciers to have covered the area about 6000 years ago. The surficial geology 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 contributes to effective mineral exploration and supports informed decision making for resource development and land use.
GEOSCAN ID297243