| Title | Surficial geology, Erly Lake, Northwest Territories - Nunavut, NTS 97-A |
| Download | Downloads |
| Author | Veillette, J; St-Onge, D A; Kerr, D E |
| Source | Geological Survey of Canada, Canadian Geoscience Map 111, 2013, 1 sheet, https://doi.org/10.4095/292245 (Open Access) |
| Image |  |
| Year | 2013 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, glacial deposits and landforms, 1:250,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 10 (NAD83) |
| Media | on-line; digital |
| File format | readme
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| File format | pdf; rtf; shp; xml; xls; jpg; JPEG2000 |
| Province | Northwest Territories; Nunavut |
| NTS | 97A |
| Area | Erly Lake; Hornaday River |
| Lat/Long WENS | -124.0000 -120.0000 69.0000 68.0000 |
| Subjects | surficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; frost cracks; glaciofluvial deposits; colluvial deposits; alluvial deposits; moraines;
organic deposits; Cenozoic; Quaternary |
| Program | GEM Tri-Territorial Information management & databases (Tri-Territorial Surficial Framework), GEM: Geo-mapping for Energy and Minerals |
| Released | 2013 03 26 |
| Abstract | The highest central regions of the Erly Lake map area were covered by active ice advancing from the southeast, although exact ages of advance(s) are unknown. Deglaciation of parts of the high interior
and southwestern sector of the map area may have started in early Wisconsinan, and may have been free of active ice in middle Wisconsinan time or earlier. Evidence of ice-free conditions is limited. Fluctuating cover of thin ice, probably cold
based, may have survived for extensive periods during the Wisconsinan. It disappeared in the Late Wisconsinan, leaving widespread kames and ice-contact deposits overlying surficial sediments and bedrock. Till is widespread at all elevations, and can
be variable in thickness, hummocky and makes up moraine ridges and streamlined landforms. In the high interior, it is locally mixed with felsenmeer and isolated kames. Glaciofluvial deposits are concentrated along major river valleys. Postglacial
fluvial erosion along the Hornaday River carved bedrock canyons up to 150m deep. |
| GEOSCAN ID | 292245 |
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