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TitleSurficial geology, Breynat Point, Northwest Territories, NTS 85-B/15
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AuthorOviatt, N M; Paulen, R C
SourceGeological Survey of Canada, Canadian Geoscience Map 114, 2013, 1 sheet, https://doi.org/10.4095/292247
Year2013
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:50,000
ProjectionUniversal Transverse Mercator Projection, zone 11 (NAD83)
Mediaon-line; digital
RelatedThis publication is related to Oviatt, N M; Paulen, R C; Rufiange, E C; (2014). Surficial geology field observations and photographs for the Breynat Point map area (NTS 85-B/15), Geological Survey of Canada, Open File 7568
File formatreadme
File formatpdf; rtf; shp; xml; xls; jpg; JPEG2000
ProvinceNorthwest Territories
NTS85B/15
AreaBreynat Point
Lat/Long WENS-119.0000 -118.5000 60.9500 60.7500
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; frost cracks; glaciolacustrine deposits; colluvial deposits; organic deposits; eolian deposits; alluvial deposits; lacustrine deposits; Cenozoic; Quaternary
ProgramGEM Tri-Territorial information management & databases (Tri-Territorial Indicator Minerals Framework), GEM: Geo-mapping for Energy and Minerals
Image
Released2013 03 19
AbstractThe Pine Point region is of very low relief and characterized by black spruce bogs with local relief not exceeding 20 m. During Wisconsin time, the Breynat Point map sheet was actively and continuously glaciated by the Laurentide Ice Sheet which was generally flowing to the west. Multiple till units were observed in the open pits, however only the uppermost unit was mapped at surface. The map area was completely inundated by proglacial Lake McConnell which formed during deglaciation, glaciolacustrine sediments are the dominant materials that occur as beach ridges and littoral sediments. Reworked beach ridges form eolian dunes up to 15 m high. Raised strandlines formed by earlier phases of Great Slave Lake mark the former isostatic rebound of the land surface. Organic deposits are extensive with mature peatlands and fens, which are underlain by discontinuous permafrost with active thermokarst. Abandoned open pits and waste piles pockmark the former Pine Point mining district.
GEOSCAN ID292247