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TitleSurficial geology, Lac de Gras, Northwest Territories, NTS 76-D
AuthorGeological Survey of Canada
SourceGeological Survey of Canada, Canadian Geoscience Map 184, 2014, 1 sheet, (Open Access)
PublisherNatural Resources Canada
EditionPrelim., Surficial Data Model V.2.0 Conversion
Maps1 map
Map Info.surficial geology, landforms, lithological, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 12 (NAD27)
Mediaon-line; digital
RelatedThis publication is superceded by Geological Survey of Canada; (2014). Surficial geology, Lac de Gras, Northwest Territories, NTS 76-D, Geological Survey of Canada, Canadian Geoscience Map no. 184, ed. 2, Prelim., Surficial Data Model V.2.0 Conversion
RelatedThis publication is related to Ward, B C; Dredge, L A; Kerr, D E; (1997). Surficial geology, Lac de Gras, District of Mackenzie, Northwest Territories, Geological Survey of Canada, "A" Series Map no. 1870A
File formatreadme
File formatpdf; JPEG2000; shp; rtf; xml; xls; jpg
ProvinceNorthwest Territories
AreaYamba Lake; Courageous Lake; Mackay Lake; Exeter Lake; Lac de Gras; Jolly Lake
Lat/Long WENS-112.0000 -110.0000 65.0000 64.0000
Subjectssurficial geology/geomorphology; landforms; lithology; tills; glaciofluvial deposits; glaciolacustrine deposits; alluvial deposits; organic deposits; glacial history; ice movement directions; glacial striations; drumlins; eskers; Wisconsinian Glacial Stage; glacial stages; glacial deposits; Pleistocene; Slave Province; Yellowknife Supergroup; Quaternary
ProgramGEM: Geo-mapping for Energy and Minerals, GEM Tri-Territorial Information management & databases (Tri-Territorial Surficial Framework)
Released2014 08 20
AbstractThis new surficial geology map product represents the conversion of A-Series Map 1870A and its legend only, using the Geological Survey of Canada's Surficial Data Model (SDM version 2.0) which can be found in Open File 7631. All geoscience knowledge and information from Map 1870A that conformed to the current SDM were maintained during the conversion process. The purpose of converting legacy map data to a common science language and common legend is to enable and facilitate the efficient digital compilation, interpretation, management, and dissemination of geologic map information in a structured and consistent manner. This provides an effective knowledge management tool designed around a geo-database which can expand following the type of information to appear on new surficial geology maps.
Summary(Plain Language Summary, not published)
The Lac de Gras map (NTS 76-D) identifies surficial materials and associated landforms left by the retreat of the last glaciers which covered the area about 10000 years ago. The surficial geology is based on aerial photograph interpretation and fieldwork. This work provides new geological knowledge and improves our understanding of the distribution, nature and glacial history of surficial materials.