| Title | Surficial geology, Wholdaia Lake south, Northwest Territories, NTS 75-A south |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Lauzon, G; Campbell, J E |
| Source | Geological Survey of Canada, Canadian Geoscience Map 342, 2018, 1 sheet, https://doi.org/10.4095/306373  Open Access |
| Links | Surficial geology map collection
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| Links | Collection de données de géologie de surface
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| Image |  |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, deposits, landforms, features, 1:100,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 13 (NAD83) |
| Media | on-line; digital |
| Related | NRCan photo(s) in this
publication |
| Related | This publication is related to Surficial geology, Abitau
Lake, Northwest Territories, NTS 75-B |
| File format | readme
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| File format | pdf; rtf; gdb (ESRI® ArcGIS(TM) 10.x); shp (ESRI® ArcGIS(TM) 10.x); xml (ESRI® ArcGIS(TM) 10.x); mxd (ESRI® ArcGIS(TM) 10.x) |
| Province | Northwest Territories |
| NTS | 75A/01; 75A/02; 75A/03; 75A/04; 75A/05; 75A/06; 75A/07; 75A/08 |
| Area | Wholdaia Lake; Beauvais Lake; Wignes Lake; Ingalls Lake; Selwyn Lake; Flett Lake; Scott Lake; Thye Lake |
| Lat/Long WENS | -106.0000 -104.0000 60.5000 60.0000 |
| Subjects | surficial geology/geomorphology; postglacial deposits; organic deposits; peat; bogs; peat bogs; fens; alluvial deposits; alluvial plains; flood plains; lacustrine deposits; lag deposits; sediment
reworking; glacial deposits; glacial landforms; glacial features; glaciolacustrine deposits; glacial lakes; proglacial lakes; glaciofluvial deposits; outwash plains; drift deposits; terraces; fans; hummocks; ice contact deposits; eskers; tills;
moraines; moraine, ribbed; moraine, end; moraine, interlobate and kame; tills; till plains; boulder fields; glacial erosion; glacial flutings; glacial striations; ice flow; ice movement directions; crag and tail; kettles; meltwater channels; flow
trajectories; drumlinoids; drumlins; deltas; kames; felsenmeer; boulders; sands; silts; clays; gravels; scarps; permafrost; periglacial features; ice-wedge polygons; thermokarst; patterned ground; glacial history; glaciation; deglaciation;
paleogeography; paleodrainage; paleocurrent directions; shoreline changes; depositional environment; sedimentary structures; bedrock geology; lithology; dykes, mafic; clasts; Dubawnt Supergroup; Barrensland Group; Pitz Lake Volcanics; Phanerozoic;
Cenozoic; Quaternary |
| Illustrations | location maps; index maps; geoscientific sketch maps; photographs |
| Program | GEM2: Geo-mapping for Energy and Minerals South Rae Province Bedrock/Surficial geology |
| Released | 2018 06 04 |
| Abstract | Wholdaia Lake south map area is predominantly mantled by thin till and thick till interspersed with organic deposits; outcrop exposure is concentrated in the south and northeast. A network of
southwest-trending meltwater corridors, containing eskers and associated glaciofluvial sediments and sandy diamictons cross the territory at regular intervals. Boulder fields surrounding Scott and Wignes lakes mark the paleoshoreline (~450 m a.s.l.)
of a short-lived proglacial lake. Reworked and/or winnowed sediments and paleoshorelines (?400 m a.s.l.) suggest proglacial lake(s) in the region of Flett Lake-northern Selwyn Lake. Three regional ice-flow directions have been identified. The oldest,
poorly defined ice flow is inferred to be to the southeast followed by a regional southward ice flow. Overprinting these is the main southwest ice flow, which is reflected in the landforms. In the Selwyn Lake area, orientation of ribbed moraines and
streamlined landforms is consistent with the dominant southwest glacial flow, whereas the northwest map area is characterized by an abundance of streamlined landforms, indicating late rapid glacial flow toward the west-southwest. |
| Summary | (Plain Language Summary, not published)
The Wholdaia Lake South map area (NTS 75A-S) identifies surficial materials and associated landforms left by the retreat of the last remnants of the
Laurentide Ice Sheet, which covered the area until about 8,000 years ago. The surficial geology is based on the interpretation of aerial photos, 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 ID | 306373 |
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