Reconnaissance surficial geology, Rae, Northwest Territories, NTS 85-K / [authors: D. E. Kerr, P. D. Morse and S. A. Wolfe]. : M183-1/290-2016E-PDF
"Following deglaciation about 11–10 ka BP, fine-grained glaciolacustrine sediments, associated with glacial Lake McConnell, were deposited in most of the map area, up to 290 m above sea level (a.s.l.). These sediments overlie buried ice-flow features such as drumlinoids, drumlins, crag-and-tails and fluted bedrock, recording a southwestward ice flow during the last glaciation. A broad discontinuous band of till extends SE-NW in the central part of the map area. Glaciofluvial sediments and some bedrock ridges were reworked into glaciolacustrine beaches throughout the area. These beaches, present at an elevation up to 300–310 m a.s.l., mark the decreasing elevation of the glacial lake over time due to isostatic rebound. In the southwest, only the Horn Plateau, consisting of undifferentiated glacial deposits with colluvium on its slopes, remained above the limit of glaciolacustrine inundation. Minor glaciolacustrine iceberg scours in the southeast and postglacial eolian dunes in the south-central regions trend SE-NW. The fine-grained glaciolacustrine sediments may be overlain by organics and exhibit thermokarst activity"--Abstract.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.816892&sl=1
| Ministère/Organisme | Canada. Natural Resources Canada. Geological Survey of Canada. |
|---|---|
| Titre | Reconnaissance surficial geology, Rae, Northwest Territories, NTS 85-K / [authors: D. E. Kerr, P. D. Morse and S. A. Wolfe]. |
| Titre de la série | Canadian geoscience map ; 290 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique |
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| Note(s) | 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. |
| Information sur la publication | Ottawa : Natural Resources Canada, 2016. |
| Auteur / Contributeur | Kerr, Daniel Ernest, 1961- Morse, Peter Douglass, 1975- Wolfe, Stephen Andrew, 1963- |
| Description | 1 map : col. + Map information document ([6] p.). |
| ISBN | 978-0-660-05387-5 |
| Numéro de catalogue |
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| Numéro de catalogue du ministère | 298838 |
| Édition | Prelim. |
| Données cartographiques | Scale 1:125 000 ; Universal Transverse Mercator, zone 11 (W 118°00’--W 116°00'/N 63°00'--N 62°00’) |
| Descripteurs | Geological maps Geomorphology Surficial geology |
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