| Title | Reconnaissance surficial geology, Rivière Grandin, Northwest Territories, NTS 86-D |
| Download | Downloads |
| Author | Kerr, D E; O'Neill, H B |
| Source | Geological Survey of Canada, Canadian Geoscience Map 361, 2018, 1 sheet, https://doi.org/10.4095/308479 (Open Access) |
| Image |  |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, sediments, landforms, features, 1:125,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 11 (NAD83) |
| Media | on-line; digital |
| Related | NRCan photo(s) in this
publication |
| File format | readme
|
| File format | pdf (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) |
| Province | Northwest Territories |
| NTS | 86D |
| Area | Rivière Grandin |
| Lat/Long WENS | -120.0000 -118.0000 65.0000 64.0000 |
| Subjects | surficial geology/geomorphology; postglacial deposits; organic deposits; eolian deposits; colluvial deposits; landslides; alluvial fans; glacial deposits; glacial landforms; glacial features; glacial
lakes; ice contact deposits; tills; till ridges; moraines; moraine, end; moraine, ribbed; glacial flutings; glacial scours; kettles; terraces; scarps; meltwater channels; eskers; paleocurrents; beach ridges; drumlinoids; drumlins; crag and tail;
kames; glacial striations; ice flow; permafrost; ground ice; periglacial features; thermokarst; silts; sands; gravels; boulders; clays; glacial history; glaciation; deglaciation; shoreline changes; isostatic rebound; depositional environment; Glacial
Lake McConnell; bog deposits; alluvial sediments; alluvial floodplain sediments; alluvial terraced sediments; lacustrine sediments; glaciolacustrine sediments; glaciolacustrine beach sediments; glaciolacustrine deltaic sediments; glaciolacustrine
veneer; glaciofluvial sediments; glaciofluvial outwash plain sediments; glaciofluvial outwash fan sediments; glaciofluvial hummocky sediments; esker sediments; interlobate morraine; hummocky tills; streamlined tills; till veneer; till blanket;
geological contacts; landslide scars; beach crests; ice-contact scarps; crevasse ridges; ice-flow directions; tundra ponds; diamicton; cobbles; outcrops; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; index maps; photographs |
| Program | Mackenzie Corridor, North Bear Surficial Mapping, GEM2: Geo-mapping for Energy and Minerals |
| Released | 2018 11 19 |
| Abstract | The Rivière Grandin map area is characterized by three glacial terrains with different surficial sediments. Inland from the shores of Hottah Lake in the northeast, glacial Lake McConnell deltas,
beaches, and offshore sediments occur between 180 and 350 m elevation. Further west, terrain near or above 500 to 600 m elevation includes hummocky glaciofluvial sediments, a few moraine ridges, abundant radial meltwater channels, and an absence of
ice-flow indicators, which may indicate local cold-based ice conditions. On the eastern edge of the Ortona Lake highlands, rare drumlins trend northwestward, perpendicular to the flutings at lower elevations to the north and south. The remaining and
most extensive map areas are generally covered by streamlined till with interspersed ridged till (minor moraines). Drumlins, crag-and-tails, and drumlinoids record northwestward and southwestward divergent and convergent paleo-ice flows. The areas
north, west, and east of Rome Lake have a greater concentration of ridged till. Late during deglaciation, a minor ice-flow shift occurred in the southwest map area, indicated by small, superimposed streamlined landforms. |
| Summary | (Plain Language Summary, not published)
The Rivière Grandin map (NTS 86-D) identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial
geology is based on aerial photograph interpretation, with striations from previous publications. This work provides new geological knowledge and improves our understanding of the distribution and nature of the surficial geology cover, and the
glacial history of this region. It contributes to resource assessments and effective land use management. |
| GEOSCAN ID | 308479 |
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