| Title | Reconnaissance surficial geology, Rivière Grandin, Northwest Territories, NTS 86-D |
| |
| Author | Kerr, D E; O'Neill, H B ; Wolfe, S A; Morse, P D |
| Source | 2018 Yellowknife Geoscience Forum, abstract and summary volume; Northwest Territories Geological Survey, Yellowknife Geoscience Forum Abstract and Summary Volume 2018, 2018 p. 109  Open Access |
| Links | Online -
En ligne (complete volume - volume complet, pdf, 1.32 MB)
|
| Image |  |
| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20180249 |
| Publisher | NTGO |
| Meeting | 46th Annual Yellowknife Geoscience Forum; Yellowknife, NT; CA; November 20-22, 2018 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 86D |
| Area | Rivière Grandin |
| Lat/Long WENS | -120.0000 -118.0000 65.0000 64.0000 |
| Subjects | surficial geology/geomorphology; glacial deposits; glacial landforms; glacial features; glacial lakes; meltwater channels; ice flow; drumlins; glacial flutings; crag and tail; drumlinoids; glaciation;
deglaciation; Glacial Lake McConnell; glaciolacustrine deltaic sediments; glaciolacustrine beach sediments; glaciolacustrine offshore sediments; glaciofluvial hummocky sediments; moraine ridges; ice-flow directions; streamlined tills; ridged tills,
moraine; Phanerozoic; Cenozoic; Quaternary |
| Program | GEM2: Geo-mapping for Energy and Minerals |
| Released | 2018 11 01 |
| Abstract | The Rivière Grandin map area is characterized by three glacial terrains identified by different surficial sediments and landforms. In the northeast along and inland from the shores of Hottah Lake,
glacial Lake McConnell deltas, beaches and offshore sediments occur between 180-350 m elevation. Farther west, in the Ortona Lake area and westward, terrain near or above 500-600 m elevation is defined by hummocky glaciofluvial sediments, a few
morainal ridges, abundant radial meltwater channels, and an absence of ice-flow indicators, which may indicate local cold-based ice regimes. On the eastern edge of these 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 topographically-deflected divergent and convergent ice flows. The area north, west and south of Rome Lake has a greater concentration of ridged till. Late during deglaciation, various minor ice-flow shifts 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 | 312325 |
|
|