| Title | Reconnaissance surficial geology, Lac la Martre, Northwest Territories, NTS 85-M |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Kerr, D E; Morse, P D ; Wolfe, S A |
| Source | Geological Survey of Canada, Canadian Geoscience Map 306, 2017, 1 sheet, https://doi.org/10.4095/304282  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 | 2017 |
| Publisher | Natural Resources Canada |
| Edition | 2, Prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, surficial deposits and features, 1:125,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 11 (NAD83) |
| Media | on-line; digital |
| Related | This publication supercedes Reconnaissance surficial
geology, Lac la Martre, Northwest Territories, NTS 85-M |
| Related | This publication is related to Reconnaissance surficial
geology, Keller Lake, Northwest Territories, NTS 95-P |
| File format | readme
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| 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 | 85M |
| Area | Lac la Martre; Lac Grandin; Bartlett Lake; Clive Lake |
| Lat/Long WENS | -120.0000 -118.0000 64.0000 63.0000 |
| Subjects | surficial geology/geomorphology; Holocene; Pleistocene; fens; bogs; organic deposits; muskegs; thermokarst; eolian deposits; dunes; colluvial deposits; talus slopes; alluvial deposits; fans; flood
plains; terraces; glacial deposits; glaciolacustrine deposits; beach deposits; shoreline changes; isostatic rebound; glacial lake deposits; proglacial lake deposits; marls; glaciofluvial deposits; outwash; outwash plains; outwash fans; meltwater
channels; ice contact deposits; kettles; eskers; hummocks; glacial flutings; tills; moraines; drumlinoids; crag and tail; drumlins; glacial scours; scarps; ice movement directions; clays; silts; sands; gravels; boulders; Ancestral Great Slave Lake;
Glacial Lake McConnell; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; index maps; aerial photographs |
| Program | GEM2: Geo-mapping for Energy and Minerals Mackenzie Corridor, North Bear Surficial Mapping |
| Released | 2017 08 09 |
| Abstract | Streamlined landforms are prevalent in the northwest and central regions, interspersed between zones of till and ridged and hummocky till elsewhere. Small moraines west of Lac la Martre form ridges
parallel to fluted landforms, and some are dissected by meltwater corridors. Eskers trend southwestward with a few exceptions. Glaciolacustrine sediments, associated with glacial Lake McConnell, occupy poorly-drained low-lying areas of the
southernmost map area. West of Lac la Martre and Bartlett Lake, some glaciofluvial sediments and bedrock ridges were reworked into glaciolacustrine beaches between 270 and 300 m a.s.l. In southern regions, extensive organics with thermokarst are
common. A northwestward ice flow in northern and central regions is overprinted by a younger and weaker westward flow. Southwestward and westward ice flow is recorded in eastern and southern regions. Larger moraines near the intersection of these
flows may mark the retreat of ice margins or stagnating lobes. |
| Summary | (Plain Language Summary, not published)
The Lac la Martre map (NTS 85-L) identifies surficial materials and associated landforms left by the retreat of the last glaciers. The surficial geology
is based on aerial photograph interpretation. This work provides new geological knowledge and improves our understanding of the distribution, nature and glacial history of surficial materials. It contributes to resource assessments and effective land
use management. |
| GEOSCAN ID | 304282 |
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