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TitleNorthern Canada glacial geomorphology database 2020: part 1 - central mainland Nunavut
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBehnia, P; McMartin, IORCID logo; Campbell, J E; Godbout, P -M; Tremblay, TORCID logo
SourceGeological Survey of Canada, Open File 8717, 2020, 6 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is related to the following publications
File formatreadme
File formatpdf; rtf; gdb (ESRI® ArcExplorer(TM) / ArcReader(TM)); shp (ESRI® ArcExplorer(TM) / ArcReader(TM)); mxd (ESRI® ArcExplorer(TM) / ArcReader(TM))
NTS46D; 46E; 46K; 46K/04; 46K/05; 46L; 46M; 46N/04; 46N/05; 55; 56; 65A; 65B; 65G; 65H; 65I; 65J; 65O; 65P; 66A; 66B; 66G; 66H; 66I; 66J; 66O; 66P
AreaHudson Bay; Wager Bay; Chesterfield Inlet
Lat/Long WENS-100.0000 -85.6667 68.0000 60.0000
Subjectssurficial geology/geomorphology; geophysics; Nature and Environment; Science and Technology; glacial landforms; glacial features; crag and tail; moraines; moraine, de geer; eskers; meltwater channels; ice margins; roches moutonnees; glacial striations; relative ages; glacial history; glaciation; ice sheets; ice flow; deglaciation; ice retreat; remote sensing; satellite imagery; Laurentide Ice Sheet; ArcticDEM; Landsat 8; Databases; moraine ridges; esker ridges; limit of submergence, marine; ice-flow directions; subglacial meltwater corridors; Geographic data; Geographic information systems; Phanerozoic; Cenozoic; Quaternary
ProgramGEM2: Geo-mapping for Energy and Minerals Rae Province, Synthesis of glacial history
Released2020 12 17
A new glacial geomorphology database was produced in a core region of the Laurentide Ice Sheet (LIS) located in mainland Nunavut, an area for which accurate palaeoglaciological reconstructions demand significant improvement on data-based knowledge of ice sheet flow patterns, subglacial thermal regimes and ice-margin chronology. The compilation builds on recent and legacy maps and is supplemented by visual digitization of glacigenic features using a high-resolution digital elevation model (ArcticDEM) and Landsat 8 images. The database also includes an updated set of both remote and ground observations acquired during previous geological mapping projects or as part of recent field mapping activities within Natural Resources Canada's Geomapping for Energy and Minerals (GEM) Program (2008-2020).
All glacial geomorphological features and standardized field datasets are integrated into an ESRI ArcGIS 10.0 geospatial database (gdb) with a scalable map in mxd format. The geodatabase will be updated as new mapping is performed or new field work is completed. From this unprecedented detailed inventory of >156,000 features and >14,000 field observations, coherent patterns of landform development (landsystems) were identified, many of which are entirely new and others significantly modified or updated. The landsystems are included as georeferenced overlays in the gdb. To improve map presentation and readability, the mapped glacial features were generalized at both 1:5 million and 1:1 million scales using a semi-automated generalization method and are provided as PDF files. A complete description of the map sources, mapping method, mapped features, field datasets and interpretations of the glacial landsystems are presented in McMartin et al. (2020). A summary of the GEM project results and an historical review of previous glacial geomorphological mapping in Keewatin are provided in McMartin et al. (in press).
Summary(Plain Language Summary, not published)
This Open File releases the complete geodatabase of glacial geomorphological features, field datasets and glacial landsystems compiled in a large area of mainland Nunavut as part of the GEM-2 Rae Synthesis of Glacial History and Dynamics Activity. : The geodatabase will also be provided as a web link within a scientific journal paper (published in Boreas) and as part of the GEM Surficial Synthesis Bulletin 611. The work was undertaken to provide new geological knowledge on the glacial history of Keewatin and help understand glacial transport characteristics across major glacial landscapes in northern regions. The findings will support informed decision making for resource exploration and land use management.

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