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TitleReconnaissance surficial geology, MacKay Lake, Northwest Territories, NTS 75-M
AuthorKerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 206, 2014, 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 12 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf; rtf; shp; xml; xls; jpg; JPEG2000
ProvinceNorthwest Territories
AreaMacKay Lake; Lac Tête d'Ours
Lat/Long WENS-112.0000 -110.0000 64.0000 63.0000
Subjectssurficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; frost cracks; glaciolacustrine deposits; glaciofluvial deposits; organic deposits; alluvial deposits; eolian deposits; colluvial deposits; eskers; Cenozoic; Quaternary
ProgramGEM2: Geo-mapping for Energy and Minerals, Rae Province Project Management
Released2014 12 17
AbstractReconnaissance mapping, through aerial photograph interpretation and limited legacy field data in the MacKay Lake map area, provides a basic understanding of surficial sediments and glacial history. The region appears to have experienced more than one ice flow, but fluted till and crag-and-tails record a dominant last, southwestward flow. Bedrock is well exposed in some areas of the northeastern and extreme southeastern regions of the map area. Elsewhere, extensive till deposits occur, with variable surface expressions. Till blanket and till veneer are common throughout the map areas, whereas morainal deposits appear in the central regions and increase in importance towards the south and west. Glaciofluvial complexes and corridors consisting of eskers, ice-contact sediments and scoured bedrock, record a generally west-southwestward meltwater flow across the map area during deglaciation. A few raised beaches and trim lines along the shores of MacKay Lake range from 410 to 440 m elevation. Their limited extent may suggest confined ice marginal glacial lakes during deglaciation.
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.