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TitleReconnaissance surficial geology, Takaatcho River, Northwest Territories, NTS 86-L
DownloadDownloads
AuthorKerr, D E; O'Neill, H B
SourceGeological Survey of Canada, Canadian Geoscience Map 388, 2019, 1 sheet, https://doi.org/10.4095/313282 (Open Access)
Image
Year2019
PublisherNatural Resources Canada
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, sediments, landforms, features, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 11 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf (Adobe® Reader®); 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)
ProvinceNorthwest Territories
NTS86L
AreaTakaatcho River
Lat/Long WENS-120.0000 -118.0000 67.0000 66.0000
Subjectssurficial geology/geomorphology; permafrost; ground ice; periglacial features; thermokarst; patterned ground; ice-wedge polygons; felsenmeer; kettles; landforms; terraces; scarps; postglacial deposits; organic deposits; dunes; glacial deposits; glacial landforms; glacial features; glacial lakes; ice contact deposits; tills; moraines; moraine, ribbed; meltwater channels; paleocurrents; eskers; beach ridges; drumlinoids; drumlins; crag and tail; glacial flutings; kames; glacial striations; ice flow; sands; silts; gravels; boulders; clays; depositional environment; glacial history; glaciation; deglaciation; raised beaches; shoreline changes; paleodrainage; Glacial Lake McConnell; icings; snowpacks; eolian sediments; alluvial sediments; alluvial floodplain sediments; alluvial terraced sediments; lacustrine sediments; lacustrine deltaic sediments; glaciolacustrine sediments; glaciolacustrine beach sediments; glaciolacustrine deltaic sediments; glaciofluvial sediments; glaciofluvial outwash plain sediments; glaciofluvial terraced sediments; glaciofluvial outwash fan sediments; esker sediments; hummocky tills; ridged tills, moraine; streamlined tills; till veneer; till blanket; ice-flow directions; thermokarst depressions; geological contacts; beach crests; outcrops; terrace scarps; cobbles; diamicton; moraine ridges; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; aerial photographs
ProgramMackenzie Corridor, Bear-Slave Surficial Mapping - Quaternary, GEM2: Geo-mapping for Energy and Minerals
Released2019 03 26
AbstractThe Takaatcho River map area is mantled by streamlined till and fluted till blanket in the northeast, and also includes dissected ridged till, hummocky till, and undifferentiated till in the central-eastern to central-western regions. A poorly developed network of southwest-trending minor meltwater corridors, containing eskers and related glaciofluvial sediments, cross the map area, except in the northeast. Raised isolated deltas and beaches mark paleoshorelines of glacial Lake McConnell south of Dease Arm (up to ~270 m a.s.l.), north of McTavish Arm (up to ~280-290 m a.s.l.), and west of Hornby Bay (up to ~300 m a.s.l.). Fine-grained glaciolacustrine sediments occur at lower elevations in these regions. Two regional ice-flow directions have been identified, with the oldest inferred to be westward to southwestward. This is the main ice-flow direction and is indicated by streamlined landforms. A younger northward flow overprinted these features in the northeast map area, recorded by abundant well developed streamlined landforms, indicating localized, late, and rapid ice flow.
Summary(Plain Language Summary, not published)
The Takaatcho River map (NTS 86-L) identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial geology is based on aerial photograph interpretation, with striations from a previous publication. This work provides new geological knowledge and improves our understanding of the distribution and nature of the surficial geology cover, and the glacial history of this region. It contributes to resource assessments and effective land use management.
GEOSCAN ID313282