Surficial geology, Curtis Lake south, Nunavut, NTS 56-I south / [authors, I. McMartin, J.E. Campbell, and L.A. Dredge].: M183-1/294-2016E-PDF

"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.

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Publication information
Department/Agency Canada. Natural Resources Canada.
Geological Survey of Canada.
Title Surficial geology, Curtis Lake south, Nunavut, NTS 56-I south / [authors, I. McMartin, J.E. Campbell, and L.A. Dredge].
Series title Canadian geoscience map ; 294
Publication type Series - View Master Record
Language [English]
Format Electronic
Electronic document
Note(s) 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.
Includes abstract in French.
Publishing information [Ottawa] : Natural Resources Canada, 2017.
Author / Contributor McMartin, Isabelle, 1964-
Campbell, Janet E. M., 1963-
Dredge, L. A.
Description 1 map : col. + 1 map information document ([7] p.).
ISBN 978-0-660-06600-4
Catalogue number
  • M183-1/294-2016E-PDF
Departmental catalogue number 299346
Edition Prelim.
Cartographic data Scale 1:100 000 ; Universal Transverse Mercator, zone 16 (W 90°00’--W 88°00'/N 66°30'--N 66°00’)
Subject terms Geological maps
Geomorphology
Surficial geology
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