Surficial geology, Elbow Lake, Manitoba, NTS 63-K/15 / [by] L.A. Dredge and I. McMartin. : M183-1/170-2013E-PDF
"Glacial sediments comprising lee-side till deposits and a discontinuous till veneer are widespread throughout the area above an elevation of 300 m asl. There, bedrock outcrops and till are interspersed with minor occurrences of Lake Agassiz offshore sediments, and organic deposits. The thickest till accumulations are found on the down-ice side of large bedrock obstructions and in structurally controlled bedrock depressions where thicknesses of 5 m or more may occur. Rare streamlined landforms and till plain have till thicknesses reaching 15 m. Below 300 m asl, mainly in the eastern part of the map area and in some lowlands around Elbow Lake, Lake Agassiz offshore sediments are more pervasive. In areas of high relief, till has undergone extensive washing and reworking during the regression of the post-glacial lake. Widespread nearshore and littoral sand and gravel occur within former glaciofluvial corridors in the northeast. Glacial striations in the Elbow Lake map area record ice flow towards the SSW (mainly ranging between 195°-208°). Age relationships were observed at one site southeast of North Star Lake where an early flow towards 192° preceded an advance towards 156°. These findings are related to the last cycle of glacial advance and retreat of ice originating from the Keewatin Sector to the north. Till sheets related to each of these events have not been recognized in the hand-dug pits or naturally exposed sections in the area. The geoscientific data presented on this map (till samples and ice-flow indicators) were collected as part of the Shield Margin NATMAP Project (Nielsen, 1992; McMartin et al., 1996). Air photo interpretation (1:60 000 scale aerial photographs) and map compilation were completed as part the TGI-3 Flin Flon Project from legacy work in 2012-2013"--Abstract.
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| Ministère/Organisme | Canada. Natural Resources Canada. Geological Survey of Canada. |
|---|---|
| Titre | Surficial geology, Elbow Lake, Manitoba, NTS 63-K/15 / [by] L.A. Dredge and I. McMartin. |
| Titre de la série | Canadian geoscience map ; 170 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographical references. Includes abstract in French. |
| Information sur la publication | Ottawa : Natural Resources Canada, c2014. |
| Auteur / Contributeur | Dredge, L. A. McMartin, Isabelle, 1964- |
| Description | 1 map : col. |
| ISBN | 978-1-100-22934-8 |
| Numéro de catalogue |
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| Numéro de catalogue du ministère | 293407 |
| Édition | Preliminary version |
| Données cartographiques | Scale 1:50,000 |
| Descripteurs | Geological maps Lakes Surficial geology |