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TitleReconnaissance surficial geology, Clarke River, Northwest Territories, NTS 65-M north
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 440, 2022, 1 sheet, Open Access logo Open Access
LinksSurficial geology map collection
LinksCollection de données de géologie de surface
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, sediments, landforms, features, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 13 (NAD83)
Mediaon-line; digital
RelatedThis publication is related to the following publications
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®)
ProvinceNorthwest Territories
NTS65M/09; 65M/10; 65M/11; 65M/12; 65M/13; 65M/14; 65M/15; 65M/16
AreaClarke River
Lat/Long WENS-104.0000 -102.0000 64.0000 63.5000
Subjectssurficial geology/geomorphology; Science and Technology; Nature and Environment; glacial history; Wisconsinian glacial stage; glaciation; ice flow; deglaciation; postglacial deposits; organic deposits; dunes; alluvial fans; landslides; glacial deposits; glacial landforms; glacial features; ice contact deposits; tills; moraines; meltwater channels; paleocurrents; eskers; kettles; kames; drumlinoids; crag and tail; glacial flutings; glacial lakes; landforms; scarps; escarpments; dunes; sea level changes; submergence; silts; sands; gravels; clays; permafrost; periglacial features; thermokarst; ice wedges; patterned ground; solifluction; depositional environment; Keewatin Ice Divide; Dubawnt Lake Ice Stream; Thelon Sandstone Formation; eolian sediments; alluvial sediments; alluvial floodplain sediments; alluvial terraced sediments; lacustrine sediments; lacustrine deltaic sediments; glaciolacustrine sediments; glaciolacustrine deltaic sediments; glaciolacustrine beach sediments; glaciolacustrine veneer; glaciofluvial sediments; glaciofluvial outwash plain sediments; glaciofluvial terraced sediments; glaciofluvial veneer; glaciofluvial blanket; esker sediments; ridged tills, moraine; streamlined tills; till veneer; till blanket; ice-flow directions; terrace scarps; beach crests; landslide scars; solifluction lobes; dune crests; limit of submergence, glaciolacustrine; moraine ridges; ice-contact scarps; drumlinoid ridges; drumlin ridges; crag-and-tail ridges; outcrops; ice streams; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; ndex maps; aerial photographs
ProgramClimate Change Geoscience Permafrost
Released2022 03 01
AbstractThe Clarke River map area (north half) comprises isolated areas of glacially and meltwater scoured bedrock, till veneers and blankets, locally fluted, and strongly fluted (mega-scale glacial lineations) streamlined till in the northeast. Ridged till may overlie fluted till blanket and streamlined till. Glaciofluvial esker complexes and associated meltwater outwash sediments trend westward (some may parallel pre-glacial valleys), southwestward, and northwestward. Glaciolacustrine sediments are a minor component. An early regional warm-based diverging southwestern and southern ice flow is well preserved in the central regions across the map area. The youngest late deglacial ice flows, in the extreme southwest and broader northeast region, are both northwesterly. The latter represents the Dubawnt Lake ice stream. During ice retreat, ridged till was deposited with minor moraines and larger recessional moraines locally. Ponding meltwater formed pro-glacial lakes with deltas, beaches, and trim lines from 355 m elevation, in the southwest, to 155 m, in the northeast.
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.

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