| Title | Surficial geology, Snowdrift, Northwest Territories, NTS 75-L |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Kerr, D E; Knight, R D ; Sharpe, D R; Cummings, D I; Kjarsgaard, B A |
| Source | Geological Survey of Canada, Canadian Geoscience Map 137, 2014, 1 sheet, https://doi.org/10.4095/295496  Open Access |
| Links | Surficial geology map collection
|
| Links | Collection de données de géologie de surface
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| Image |  |
| Year | 2014 |
| Publisher | Natural Resources Canada |
| Edition | 2, Prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, glacial deposits and landforms, 1:125,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 12 (NAD83) |
| Media | on-line; digital |
| Related | NRCan photo(s) in this
publication |
| Related | This publication supercedes Surficial geology, Snowdrift,
Northwest Territories, NTS 75-L |
| File format | readme
|
| File format | pdf; rtf; shp; xml; xls; jpg; JPEG2000 |
| Province | Northwest Territories |
| NTS | 75L |
| Area | Snowdrift; McDonald Lake; Keith Island; Great Slave Lake; Pethei Peninsula |
| Lat/Long WENS | -112.0000 -110.0000 63.0000 62.0000 |
| Subjects | surficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; frost cracks; glaciolacustrine deposits; glaciofluvial deposits; organic deposits; alluvial
deposits; eolian deposits; colluvial deposits; eskers; Cenozoic; Quaternary |
| Program | GEM: Geo-mapping for Energy and Minerals GEM Tri-Territorial Information management & databases (Tri-Territorial Surficial Framework) |
| Released | 2014 11 10 |
| Abstract | The Snowdrift map area is characterized by predominantly glaciated, scoured and washed bedrock terrain. The more elevated areas north and south of the East Arm have isolated deposits of till veneer and
blanket. Within the East Arm, some low lying depressions between bedrock ridges are infilled by glaciolacustrine sediments, with various colluvial deposits covering the steepest slopes. Glaciofluvial complexes consisting of eskers, ice-contact
sediments and outwash, trend southwestward in the north and westward in the southern map areas. The Snowdrift River valley and its tributaries are predominantly infilled by terraced and floodplain alluvial sediments, and ridged and outwash
glaciofluvial sediments, some with active dunes. The last ice flow recorded by glacial striae, fluted bedrock and crag-and-tails, was generally southwestward to westward, in the extreme southeast region of the map area. At various elevations,
evidence of glacial Lake McConnell is found: isolated glaciolacustrine deltas at 350 m, 335 m, 320 m, 275 m, 260 m; washing limits at 335 m and 320 m; and raised beaches and wave-cut terraces at 335 m, 320 m, 305 m, 285 m, 228 m, 213 m, 200 m, 183 m
and 168 m a.s.l. |
| Summary | (Plain Language Summary, not published)
The Snowdrift map (NTS 75-L) identifies surficial materials and associated landforms left by the retreat of the last glaciers which covered the area
about 9000 years ago. The surficial geology is based on aerial photograph interpretation and fieldwork. This work provides new geological knowledge and improve our understanding of the distribution, nature and glacial history of surficial
materials. |
| GEOSCAN ID | 295496 |
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