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TitleReconnaissance surficial geology, Lac la Martre, Northwest Territories, NTS 85-M
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKerr, D E; Morse, P DORCID logo; Wolfe, S AORCID logo
SourceGeological Survey of Canada, Canadian Geoscience Map 306, 2017, 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, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 11 (NAD83)
Mediaon-line; digital
RelatedThis publication is superceded by Reconnaissance surficial geology, Lac la Martre, Northwest Territories, NTS 85-M
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
AreaLac la Martre; Lac Grandin; Bartlett Lake; Clive Lake
Lat/Long WENS-120.0000 -118.0000 64.0000 63.0000
Subjectssurficial geology/geomorphology; Holocene; Pleistocene; fens; bogs; organic deposits; muskegs; thermokarst; eolian deposits; dunes; colluvial deposits; talus slopes; alluvial deposits; fans; flood plains; terraces; glacial deposits; glaciolacustrine deposits; beach deposits; shoreline changes; isostatic rebound; glacial lake deposits; proglacial lake deposits; marls; glaciofluvial deposits; outwash; outwash plains; outwash fans; meltwater channels; ice contact deposits; kettles; eskers; hummocks; glacial flutings; tills; moraines; drumlinoids; crag and tail; drumlins; glacial scours; scarps; ice movement directions; clays; silts; sands; gravels; boulders; Ancestral Great Slave Lake; Glacial Lake McConnell; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; aerial photographs
ProgramGEM2: Geo-mapping for Energy and Minerals Rae Province Project Management
Released2017 05 03; 2017 09 29
AbstractStreamlined landforms are prevalent in the northwest and central regions, interspersed between zones of till and ridged and hummocky till elsewhere. Small moraines west of Lac la Martre form ridges parallel to fluted landforms, and some are dissected by meltwater corridors. Eskers trend southwestward with a few exceptions. Glaciolacustrine sediments, associated with glacial Lake McConnell, occupy poorly-drained low-lying areas of the southernmost map area. West of Lac la Martre and Bartlett Lake, some glaciofluvial sediments and bedrock ridges were reworked into glaciolacustrine beaches between 270 and 300 m a.s.l. In southern regions, extensive organics with thermokarst are common. A northwestward ice flow in northern and central regions is overprinted by a younger and weaker westward flow. Southwestward and westward ice flow is recorded in eastern and southern regions. Larger moraines near the intersection of these flows may mark the retreat of ice margins or stagnating lobes.
Summary(Plain Language Summary, not published)
The Lac la Martre map (NTS 85-L) identifies surficial materials and associated landforms left by the retreat of the last glaciers. 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. It contributes to resource assessments and effective land use management.

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