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TitleSurficial geology, Cape Dobbs, Nunavut, parts of NTS 46-E
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorRandour, I; McMartin, I; Campbell, J E; Dredge, L A
SourceGeological Survey of Canada, Canadian Geoscience Map 422, 2020, 1 sheet, https://doi.org/10.4095/321455 (Open Access)
Image
Year2020
PublisherNatural Resources Canada
Documentserial
Lang.English
Maps1 map
Map Info.surficial geology, sediments, landforms, features, 1:100,000
ProjectionUniversal Transverse Mercator Projection, UTM zone 16 (NAD83)
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf (Adobe® Reader®); rtf; gdb (ESRI® ArcGIS(TM) v.10.x); dbf (ESRI® ArcGIS(TM) v.10.x); shp (ESRI® ArcGIS(TM) v.10.x); xls (Microsoft® Excel® 2010); xml (ESRI® ArcGIS(TM) v.10.x); mxd (ESRI® ArcGIS(TM) v.10.x)
ProvinceNunavut
NTS46E/02; 46E/03; 46E/04; 46E/05; 46E/06; 46E/09NW; 46E/09SW; 46E/10; 46E/11; 46E/12; 46E/13; 46E/14; 46E/15; 46E/16
AreaCape Dobbs; Roes Welcome Sound; Wager Bay
Lat/Long WENS -88.0000 -86.0000 66.0000 65.0000
Subjectssurficial geology/geomorphology; geochronology; Nature and Environment; Science and Technology; postglacial deposits; organic deposits; marine sediments; deltas; glacial features; glacial deposits; glacial landforms; ice contact deposits; tills; moraines; moraine, de geer; kettles; meltwater channels; paleocurrents; eskers; beach ridges; drumlinoids; crag and tail; glacial flutings; kames; glacial striations; sands; gravels; silts; clays; boulders; glacial history; glaciation; deglaciation; ice sheets; ice flow; ice retreat; sea level changes; submergence; shoreline changes; strandlines; emergence; permafrost; ground ice; periglacial features; thermokarst; patterned ground; ice-wedge polygons; frost boils; frost heaving; frost action; sediment reworking; depositional environment; sedimentary structures; radiometric dating; radiocarbon dating; Tyrrell Sea; Keewatin Ice Divide; Rae Isthmus Ice Stream; alluvial sediments; marine littoral sediments; marine deltaic sediments; marine veneer; marine blanket; glaciofluvial sediments; glaciofluvial outwash plain sediments; glaciofluvial hummocky sediments; hummocky tills; moraine ridges; till veneer; till blanket; geological contacts; beach crests; limit of submergence, marine; subglacial meltwater corridors; ice-flow directions; outcrops; station locations, remote observation; station locations, ground observation; dated sample locations; station locations; diamicton; cobbles; elevations; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; index maps; photographs; geoscientific sketch maps; tables
ProgramGEM2: Geo-mapping for Energy and Minerals, Rae Province, Tehery-Wager Bay
ProgramPolar Continental Shelf Program
ProgramGEM: Geo-mapping for Energy and Minerals
Released2020 12 22
AbstractThe Cape Dobbs map area was located under the Keewatin Ice Divide during the last glaciation; as a result, the nature of surficial materials and direction of ice flow differ on either side of Wager Bay. South of Wager Bay, bedrock outcrops glacially scoured to the southeast are interspersed with till deposits or, below the marine limit at ~140 m a.s.l., thin marine sediments and reworked till. North of Wager Bay, north-northeastward-trending streamlined landforms underlain by thick till are predominant in the north; they are part of an ice-streaming flow towards Rae Isthmus. In the rest of the area, the northward landforms are largely obliterated by late east-trending streamlined landforms towards Roes Welcome Sound, as a result of drawdown and marine incursion in Hudson Bay. Areas below the marine limit at 135 to 145 m are characterized by bare bedrock, modified bouldery till surfaces, and esker ridges, interspersed with thin marine sediments and raised beaches.
Summary(Plain Language Summary, not published)
The Cape Dobbs map area (NTS 46E) identifies surficial materials and associated landforms left by the retreat of the last glaciers which covered the area until about 7000 years ago. The surficial geology is based on aerial photograph interpretation, LANDSAT 7 and SPOT satellite imageries, and fieldwork. This work was undertaken to provide new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial materials. This work will support informed decision making for resource development and land use.
GEOSCAN ID321455