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TitleSurficial geology, Wholdaia Lake south, Northwest Territories, NTS 75-A south
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AuthorLauzon, G; Campbell, J E
SourceGeological Survey of Canada, Canadian Geoscience Map 342, 2018, 1 sheet, https://doi.org/10.4095/306373
Year2018
PublisherNatural Resources Canada
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, deposits, landforms, features, 1:10,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 13 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; gdb (ESRI® ArcGIS(TM) 10.x); shp (ESRI® ArcGIS(TM) 10.x); xml (ESRI® ArcGIS(TM) 10.x); mxd (ESRI® ArcGIS(TM) 10.x)
ProvinceNorthwest Territories
NTS75A/01; 75A/02; 75A/03; 75A/04; 75A/05; 75A/06; 75A/07; 75A/08
AreaWholdaia Lake; Beauvais Lake; Wignes Lake; Ingalls Lake; Selwyn Lake; Flett Lake; Scott Lake; Thye Lake
Lat/Long WENS-106.0000 -104.0000 60.5000 60.0000
Subjectssurficial geology/geomorphology; postglacial deposits; organic deposits; peat; bogs; peat bogs; fens; alluvial deposits; alluvial plains; flood plains; lacustrine deposits; lag deposits; sediment reworking; glacial deposits; glacial landforms; glacial features; glaciolacustrine deposits; glacial lakes; proglacial lakes; glaciofluvial deposits; outwash plains; drift deposits; terraces; fans; hummocks; ice contact deposits; eskers; tills; moraines; moraine, ribbed; moraine, end; moraine, interlobate and kame; tills; till plains; boulder fields; glacial erosion; glacial flutings; glacial striations; ice flow; ice movement directions; crag and tail; kettles; meltwater channels; flow trajectories; drumlinoids; drumlins; deltas; kames; felsenmeer; boulders; sands; silts; clays; gravels; scarps; permafrost; periglacial features; ice-wedge polygons; thermokarst; patterned ground; glacial history; glaciation; deglaciation; paleogeography; paleodrainage; paleocurrent directions; shoreline changes; depositional environment; sedimentary structures; bedrock geology; lithology; dykes, mafic; clasts; Dubawnt Supergroup; Barrensland Group; Pitz Lake Volcanics; palsa; diamicton; cobbles; crevasse fill; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; geoscientific sketch maps; photographs
ProgramSouth Rae Province Bedrock/Surficial geology, GEM2: Geo-mapping for Energy and Minerals
Image
Released2018 06 04
AbstractWholdaia Lake south map area is predominantly mantled by thin till and thick till interspersed with organic deposits; outcrop exposure is concentrated in the south and northeast. A network of southwest-trending meltwater corridors, containing eskers and associated glaciofluvial sediments and sandy diamictons cross the territory at regular intervals. Boulder fields surrounding Scott and Wignes lakes mark the paleoshoreline (~450 m a.s.l.) of a short-lived proglacial lake. Reworked and/or winnowed sediments and paleoshorelines (?400 m a.s.l.) suggest proglacial lake(s) in the region of Flett Lake-northern Selwyn Lake. Three regional ice-flow directions have been identified. The oldest, poorly defined ice flow is inferred to be to the southeast followed by a regional southward ice flow. Overprinting these is the main southwest ice flow, which is reflected in the landforms. In the Selwyn Lake area, orientation of ribbed moraines and streamlined landforms is consistent with the dominant southwest glacial flow, whereas the northwest map area is characterized by an abundance of streamlined landforms, indicating late rapid glacial flow toward the west-southwest.
Summary(Plain Language Summary, not published)
The Wholdaia Lake South map area (NTS 75A-S) identifies surficial materials and associated landforms left by the retreat of the last remnants of the Laurentide Ice Sheet, which covered the area until about 8,000 years ago. The surficial geology is based on the interpretation of aerial photos, LANDSAT 7 and SPOT satellite imageries, and fieldwork. This work was undertaken to provide new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial materials. This work will support informed decision making for resource development and land use.
GEOSCAN ID306373