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TitleReconnaissance surficial geology, Kathawachaga Lake, Nunavut, NTS 76-L
DownloadDownloads
AuthorKerr, D E
SourceGeological Survey of Canada, Canadian Geoscience Map 363, 2018, 1 sheet, https://doi.org/10.4095/308367
Year2018
PublisherNatural Resources Canada
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, deposits, landforms, features, 1:125,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 12 (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)
ProvinceNunavut
NTS76L
AreaKathawachaga Lake
Lat/Long WENS-112.0000 -110.0000 67.0000 66.0000
Subjectssurficial geology/geomorphology; snow; permafrost; ground ice; periglacial features; ice-wedge polygons; solifluction; landslides; postglacial deposits; organic deposits; peat bogs; muskeg; dunes; alluvial fans; glacial deposits; glacial features; glacial landforms; ice contact deposits; tills; glacial striations; glacial flutings; kettles; meltwater channels; paleocurrents; flow trajectories; glacial scours; moraines; eskers; drumlinoids; crag and tail; kames; glacial lakes; sands; gravels; silts; clays; boulders; landforms; scarps; glacial history; glaciation; ice flow; Wisconsinian glacial stage; deglaciation; sea level changes; raised beaches; shoreline changes; depositional environment; paleodrainage; Laurentide Ice Sheet; snowpacks; icings; eolian sediments; alluvial sediments; alluvial floodplain sediments; alluvial terraced sediments; glaciolacustrine sediments; glaciolacustrine beach sediments; glaciolacustrine deltaic sediments; glaciolacustrine subaqueous moraine complexes; glaciofluvial sediments; glaciofluvial outwash plain sediments; glaciofluvial terraced sediments; glaciofluvial outwash fan sediments; esker sediments; hummocky tills; till veneer; till blanket; dune crests; landslide scars; terrace scarps; ice-contact scarps; beach crests; limit of submergence, glaciolacustrine; subglacial meltwater corridors; moraine ridges; esker ridges; pre-crag ridges; ice-flow directions; cobbles; pebbles; diamicton; graviy flow deposits; retrogressive thaw flows; gravity induced movement; Phanerozoic; Cenozoic; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; aerial photographs
Viewing
Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramPermafrost, Climate Change Geoscience
Image
Released2018 07 17
AbstractWidespread striations and ice-flow directional landforms in the west half of the map area, as well as isolated striations in the east half, record northwestward regional ice advance. Subsequent ice flow towards the west-northwest, west, and southwest affected much of the eastern map area. As ice receded southeastward, a series of proglacial lakes developed. Within the Hood River valley, a number of deltas were identified between 400 and 300 m a.s.l. In the Cracroft River valley, a short-lived ice marginal lake formed at 330-340 m a.s.l. Beaches, trim lines, and deltas between 490 and 430 m in the Contwoyto Lake-Kathawachaga Lake-Burnside River region may relate to Glacial Lake Contwoyto further south. Hummocky till and a few isolated moraines in the southern regions mark receding ice margins or stagnating lobes during deglaciation about 9 ka BP. Streamlined landforms are generally associated with till blanket, and widespread till veneer is transitional to extensive bedrock. Glaciofluvial complexes generally trend northwestward.
Summary(Plain Language Summary, not published)
The Kathawachaga Lake map (NTS 76-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.
GEOSCAN ID308367