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TitleSurficial geology field observations and photographs for the Breynat Point map area (NTS 85-B/15)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorOviatt, N M; Paulen, R CORCID logo; Rufiange, E C
SourceGeological Survey of Canada, Open File 7568, 2014, 15 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is related to Surficial geology, Breynat Point, Northwest Territories, NTS 85-B/15
File formatreadme
File formatpdf; rtf; xls; jpg
ProvinceNorthwest Territories
AreaBreynat Point; Great Slave Lake
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; bedrock geology; Pine Point mining district; Cenozoic; Quaternary
Illustrationstables; location maps; photographs
ProgramGEM: Geo-mapping for Energy and Minerals GEM Tri-Territorial information management & databases (Tri-Territorial Indicator Minerals Framework)
Released2014 01 31
AbstractAs part of the Geological Survey of Canada's Geo-mapping for Energy and Minerals (GEM) Program, surficial mapping was undertaken in the Breynat Point map area, National Topographic System (NTS) 85B/15. The 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. 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 during deglaciation and glaciolacustrine sediments are the dominant materials that occur as beach ridges and littoral sediments. Beach ridges were reworked to form eolian dune ridges 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. This open file is to augment information available from Canadian Geoscience Map 114, and provides additional information on field observations made during the production of this map.
Summary(Plain Language Summary, not published)
This is the field observations and photographs that were collected and used to create Canadian Geoscience Map 114. This information can be used to aid in understanding and interpreting the local surficial geology for the Pine Point region, Northwest Territories.

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