00000nem 2200000za 4500 9.826106 CaOODSP 20230131161137 m go c f cr ||||||||||| 170208s2017 onca bd a fo 0 eng d 978-0-660-06600-4 CaOODSP eng eng fre n-cn-nu M183-1/294-2016E-PDF McMartin, Isabelle, 1964- Surficial geology, Curtis Lake south, Nunavut, NTS 56-I south [electronic resource] / [authors, I. McMartin, J.E. Campbell, and L.A. Dredge]. Prelim. Scale 1:100 000 ; Universal Transverse Mercator, zone 16 (W 90°00’--W 88°00'/N 66°30'--N 66°00’) [Ottawa] : Natural Resources Canada, 2017. 1 map : col. + 1 map information document ([7] p.). Canadian geoscience map ; 294 Relief shown by contours. This record only includes the map and the “Map information document” in PDF, the complete data set with all the files in various formats is available for free download at http://geoscan.nrcan.gc.ca/ Includes bibliographical references. "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. Major changes in ice-flow directions 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."--Abstract. Includes abstract in French. gccst Geological maps gccst Geomorphology gccst Surficial geology Campbell, Janet E. M., 1963- Dredge, L. A. Canada. Natural Resources Canada. Geological Survey of Canada. Canadian geoscience map ; 294. (CaOODSP)9.506260 PDF 184.69 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-1-294-2016-eng.pdf Map PDF 698 KB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-1-294-2016-1-eng.pdf Map information document HTML N/A https://doi.org/10.4095/299346 GEOSCAN DOI 299346