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TitleReconnaissance surficial geology, Hill Island Lake, Northwest Territories, NTS 75-C
AuthorLevson, V M; Ferbey, T; Kerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 263, 2016, 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
ProvinceNorthwest Territories
AreaHill Island Lake; Alcantara Lake; Delight Lake; Oswald Lake; Whirlwind Lake
Lat/Long WENS-110.0000 -108.0000 61.0000 60.0000
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; eskers; Cenozoic; Quaternary
ProgramGEM2: Geo-mapping for Energy and Minerals, Rae Province Project Management
Released2016 10 24
AbstractReconnaissance mapping, through air photograph interpretation and limited legacy field data in the Hill Island Lake map area, provides a basic understanding of surficial sediments and glacial history. Bedrock is well exposed throughout the map area but more extensive in the northern half. Till blanket, veneer and glaciofluvial outwash become increasingly more abundant towards the southern third of the map area. Drumlinized till, crag-and-tails, and striations record ice advance to the southwest. Small isolated moraine ridges may reflect deglacial stagnant ice. Glaciofluvial corridors of eskers and scoured bedrock, record a southwestward meltwater flow during deglaciation. Some corridors are topographically controlled. In the Hill Island and Taylor Lake basins, glaciolacustrine deltas are found at 340 m. Pockets of glaciolacustrine sediments occur along the Thoa, Nolan, Abita river basins, and in the Oswald, Delight, Kidder and other smaller lake basins. These are interpreted to be short lived, ice-dammed glacial lakes. Postglacial dune ridges up to 1-2 km long trend NW-SE.
Summary(Plain Language Summary, not published)
The map identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial geology is based on aerial photograph interpretation and limited legacy fieldwork. This work provides new geological knowledge and improves our understanding of the distribution, nature and glacial history of surficial materials. It contributes to resource assessments and effective land use management.