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TitleReconnaissance surficial geology, Clarke River (south half), Northwest Territories, NTS 65-M
AuthorLevson, V M; Ferbey, T; Kerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 157, 2013, 1 sheet, (Open Access)
PublisherNatural Resources Canada
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 13 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; shp; xml; xls; jpg; JPEG2000
ProvinceNorthwest Territories
NTS65M/01; 65M/02; 65M/03; 65M/04; 65M/05; 65M/06; 65M/07; 65M/08
AreaClarke River; Ernie Lake; Dubawnt Lake
Lat/Long WENS-104.0000 -102.0000 63.5000 63.0000
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; glaciolacustrine deposits; glaciofluvial deposits; organic deposits; alluvial deposits; colluvial deposits; eolian deposits; lacustrine deposits; moraines; Cenozoic; Quaternary
ProgramGEM: Geo-mapping for Energy and Minerals, Geomapping for Energy & Minerals (GEM) - Geo-mapping Frontiers
Released2013 07 26
AbstractPreliminary surficial geology studies, through aerial photographic interpretation undertaken in the Clarke River map area (south half), provide an improved understanding of the surficial geology and regional glacial history. Till blankets and veneers are dominant. Streamlined, ridged and hummocky till are less common. Extensive bedrock occurs west of Dubawnt Lake. Two major, westerly to northwesterly trending, glaciofluvial systems transect the area, characterized by major meltwater channels and large esker-kame complexes. An extensive branching esker system occurs in the north-central region and several, relatively shallow, meltwater channels with terraced glaciofluvial deposits occur in the west-central regions. Drumlins, flutings and crag-and-tail ridges in the southern half of the area consistently show westerly to west-northwesterly ice flow. In the northeast to northwest corners of the map, a second set of flutings occur, locally associated with short east-west trending morainic ridges. These flutings are generally shorter and less distinct, suggesting a weaker, possibly later southern flow.
Summary(Plain Language Summary, not published)
The Clarke River map (NTS 65-M, south half) identifies surficial geology and associated landforms left by the retreat of the last glaciers which covered the area about 8500 years ago. The surficial geology is based on aerial photograph interpretation. This work provides new geological knowledge and improves our understanding of the distribution, nature and glacial history of surficial materials.