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TitleSurficial geology, La Biche River northwest, Yukon-Northwest Territories, NTS 95-C/11, 12, 13, and 14
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorSmith, I RORCID logo
SourceGeological Survey of Canada, Canadian Geoscience Map 455, 2022, 1 sheet, Open Access logo Open Access
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, sediments, landforms and features, 1:100,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 10 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; gdb (ESRI® ArcGIS(TM) v.10.x); shp (ESRI® ArcGIS(TM) v.10.x); xml (ESRI® ArcGIS(TM) v.10.x); mxd (ESRI® ArcGIS(TM) v.10.x); xls (Microsoft® Excel® 2010)
ProvinceNorthwest Territories; Yukon
NTS95C/11; 95C/12; 95C/13; 95C/14
AreaJackpine Lake; Whitefish River; La Biche River
Lat/Long WENS-126.0000 -125.0000 61.0000 60.5000
Subjectssurficial geology/geomorphology; organic deposits; colluvial deposits; mass wasting; alluvial deposits; lacustrine deposits; postglacial deposits; glaciolacustrine deposits; Wisconsinian glacial stage; glaciofluvial deposits; till deposits; bedrock geology; thermokarst; paleodrainage; meltwater channels; moraines; eskers; drumlinoids; drumlins; cirques; Cordilleran Ice Sheet; Mattson Formation; Besa River Formation; Quaternary
Illustrationslocation maps; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals Information Management
Released2022 12 20
AbstractThis map is situated in the Hyland Plateau, west of the Mackenzie Mountains, southeast Yukon. The area was inundated by the Cordilleran Ice Sheet during the Late Wisconsinan glaciation. Ice advanced east to northeast across the rolling bedrock terrain, producing dense networks of sometimes cross-cutting bedrock flutings and drumlinoid ridges. During deglaciation, ice flow became increasingly topographically constrained, shifting to more northward flow along major valleys. Meltwater flowing north initially crossed the divide into the Nahanni River basin. Later, as ice retreated south and eastwards, ice-contact deltas and kame terraces formed along the retreating margins. The area is largely covered by till veneer, with bedrock exposed along most ridge crests and glacially-incised valley walls. Shale units within the Besa River and Mattson formations appear prone to failure, and large rotational landslides are common.
Summary(Plain Language Summary, not published)
This surficial geology map extends coverage through northwest NTS map sheet 95C. It documents extensive areas of till cover across the undulating Highland Plateau, and extensive bedrock-controlled landsliding. The glacial history reveals an initial westward, valley-confined incursion by the Laurentide Ice Sheet, that is later coalescent with and then displaced by the eastward advancing Cordilleran Ice Sheet. The entire map area was eventually subsumed by the Cordilleran Ice Sheet.

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