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TitleSurficial geology, Reliance, Northwest Territories, NTS 75-K
AuthorKerr, D E; Knight, R D; Sharpe, D R; Cummings, D I
SourceGeological Survey of Canada, Canadian Geoscience Map 138, 2014, 1 sheet, (Open Access)
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 12 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; shp; xml; xls; jpg; JPEG2000
ProvinceNorthwest Territories
AreaReliance; Siltaza Lake; Great Slave Lake; McLeod Bay; Nonacho Lake
Lat/Long WENS-110.0000 -108.0000 63.0000 62.0000
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; frost cracks; glaciolacustrine deposits; glaciofluvial deposits; organic deposits; alluvial deposits; eolian deposits; colluvial deposits; Cenozoic; Quaternary
ProgramGEM Tri-Territorial Information management & databases (Tri-Territorial Surficial Framework), GEM: Geo-mapping for Energy and Minerals
Released2014 02 14
AbstractThe Reliance map area is characterized by three main elements based on distribution and nature of surficial sediments. The northeast and southeast map areas have a greater cover of fluted and drumlinized till blanket, with some transitional till veneer. Throughout the rest of the map sheet, extensive areas of bedrock predominate, with minor isolated deposits of till. The Lockhart and Snowdrift river valleys are predominantly infilled by meandering alluvial and terraced glaciofluvial sediments, some with active dunes. In these valleys, terraces and outwash plains occur at various elevations, including 230 m, 245 m, 260 m, 305 m, and 320 m a.s.l. Some may be related to glacial Lake McConnell, as are raised beaches at 335 m a.s.l. in McLeod Bay. Glaciofluvial corridors, of various magnitudes, consisting of eskers, ice-contact sediments, and scoured bedrock, trend generally southwestward to westward across the map area. Isolated glaciolacustrine deltas record local ponding of glacial meltwater. The last dominant ice flow varied from southwestward to westward.
Summary(Plain Language Summary, not published)
The Reliance map (NTS 75-K) identifies surficial materials and associated landforms left by the retreat of the last glaciers which covered the area about 9000 years ago. The surficial geology is based on aerial photograph interpretation and fieldwork. This work provides new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial materials.