| Title | Surficial geology, Curtis Lake south, Nunavut, NTS 56-I south |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | McMartin, I ;
Campbell, J E; Dredge, L A |
| Source | Geological Survey of Canada, Canadian Geoscience Map 294, 2017, 1 sheet, https://doi.org/10.4095/299346  Open Access |
| Links | Surficial geology map collection
|
| Links | Collection de données de géologie de surface
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| Image |  |
| Year | 2017 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, glacial deposits and landforms, 1:100,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 16 (NAD83) |
| Media | on-line; digital |
| Related | This publication is related to Surficial geology, Arrowsmith
River south, Nunavut, NTS 56-O south |
| File format | readme
|
| File format | pdf; rtf; shp; xml; tif; gdb; mxd |
| Province | Nunavut |
| NTS | 56I/01; 56I/02; 56I/03; 56I/04; 56I/05; 56I/06; 56I/07; 56I/08 |
| Area | Curtis Lake |
| Lat/Long WENS | -90.0000 -88.0000 66.5000 66.0000 |
| Subjects | surficial geology/geomorphology; glacial features; glacial deposits; glacial landforms; tills; sands; gravels; moraines; glaciofluvial deposits; glaciolacustrine deposits; alluvial deposits; organic
deposits; eolian deposits; lacustrine deposits; marine deposits; ice flow; flow trajectories; thermokarst; ice-wedge polygons; kettles; paleogeography; shoreline changes; submergence; meltwater channels; eskers; scarps; drumlinoids; drumlins; crag
and tail; flutings; hummocks; fans; deltas; ice contact deposits; glacial striations; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; index maps; sketch maps |
| Program | GEM2: Geo-mapping for Energy and Minerals Rae Province, Tehery-Wager Bay |
| Program | Polar Continental Shelf Program
|
| Program | GEM: Geo-mapping for Energy and Minerals Multiple Metals - Melville Peninsula (Nunavut) |
| Released | 2017 01 25 |
| Abstract | The Curtis Lake south map area is extensively covered by streamlined till, interspersed by bedrock uplands, and by linear glacial troughs in the southwest. Large crag-and-tail landforms apparent on the
DEM converge north-northeastward, associated with a major ice stream during the last glaciation (Fig. 1). Major changes in ice-flow directions (Fig. 1) and complex retreat patterns characterized deglaciation. Retreat of ice margins associated with
cold-based ice started southward and cold-based, as recorded by abundant lateral ice-marginal meltwater channels found mainly in the north part of the map area. Late during deglaciation, two major ice-flow shifts occurred as a result of drawdown into
marine embayments: an eastward flow towards Repulse Bay in the east, and a flow reversal towards Wager Bay in the southwest. Late striations, superimposed streamlined landforms, eskers, subglacial meltwater corridors and channels attest to a
warm-based deglaciation in these areas. In the central uplands, retreat to remnant ice masses centred over many of the large lake basins continued largely cold-based, preserving the northward streamlined glacial landscape. The postglacial sea
inundated the lowest valleys in the southwest up to 120 m a.s.l. |
| Summary | (Plain Language Summary, not published)
The Curtis Lake South map area (NTS 56I-S) identifies surficial materials and associated landforms left by the retreat of the last glaciers which covered
the area until about 6000 years ago. The surficial geology is based on aerial photography interpretation, satellite imageries and field work. 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 | 299346 |
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