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TitleReconnaissance surficial geology, Armark Lake, Nunavut, NTS 66-K, south
DownloadDownloads
AuthorDredge, L A; Kerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 274, 2016, 1 sheet, https://doi.org/10.4095/298791
Year2016
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, glacial deposits and landforms, 1:125,000
ProjectionUniversal Transverse Mercator Projection, zone 14 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; shp; xml; xls; jpg
ProvinceNunavut
NTS66K/01; 66K/02; 66K/03; 66K/04; 66K/05; 66K/06; 66K/07; 66K/08
AreaArmark Lake; Garry Lake
Lat/Long WENS-102.0000 -100.0000 66.5000 66.0000
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
ProgramRae Province Project Management, GEM2: Geo-mapping for Energy and Minerals
Image
Released2016 08 16
AbstractPreliminary surficial geology studies, based on air photo interpretation and limited recent field data, were undertaken in the south half of the Armark Lake map area to provide an understanding of surficial materials and regional glacial history. Much of the map area is covered by till veneer and swaths of sandy till with streamlined forms indicating ice flow to the NNW. Till blankets contain material derived from Thelon sandstone bedrock south of the map area, although till veneers are derived from more local bedrock. Subglacial meltwater corridors, spaced across the area, are also oriented NNW. An extensive, sandy kame moraine, characterized by kettle topography and kame terraces, marks a recessional ice margin on the north side of Garry Lake. Short-lived ice-marginal and proglacial lakes covered much of the terrain below an elevation of 220 m, leaving flat sandy deposits with thermokarst depressions and tundra ponds. The most extensive glacial lake deposits lie north of the kame moraine.
Summary(Plain Language Summary, not published)
The Armark Lake map (NTS 66-K south) identifies surficial materials and associated landforms left by the retreat of the last glacier. The surficial geology is based on aerial photograph interpretation. This work was undertaken to provide new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial materials. This contributes to more effective mineral exploration and supports informed decision making for resource development and land use.
GEOSCAN ID298791