New contributions to the ice-flow chronology in the Boothia-Lancaster Ice Stream catchment area / T. Tremblay and M. Lamothe. : M183-7/6-2022E-PDF
"Within the Boothia-Lancaster Ice Stream (BLIS) catchment area, ice flow patterns were reconstructed based on the synthesis of striation directions and cross-cutting relationships, transport patterns of erratic boulders, glacial landforms, cold-based glacial landsystems, and ice-retreat chronology. New ArcticDEM data, high-definition satellite imagery and multibeam echosounder bathymetric datasets provided increased details on ice flow indicators. Convergent high-velocity ice flows through the BLIS main axis were major, persistent features in the northeastern Laurentide Ice Sheet through the last glaciation, and this study highlights intensity fluctuations and ice flow pattern variations that occurred during that time. Highly contrasting glacial geomorphology, notably in the abundance of moraines, reflects marked differences in ice-margin retreat rates and patterns during deglaciation between the western and eastern sides of the BLIS"--Abstract, page 1.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.917090&sl=1
| Ministère/Organisme | Geological Survey of Canada, issuing body. |
|---|---|
| Titre | New contributions to the ice-flow chronology in the Boothia-Lancaster Ice Stream catchment area / T. Tremblay and M. Lamothe. |
| Titre de la série | Preprint, 2816-7872 ; 6 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographical references (pages 33-40). Includes abstracts in English and French. |
| Information sur la publication | [Ottawa] : Geological Survey Canada, 2022. ©2022 |
| Auteur / Contributeur | Tremblay, T. (Tommy)author. |
| Description | 1 online resource (40 pages) : colour illustrations, maps (chiefly colour). |
| ISBN | 9780660461861 |
| Numéro de catalogue |
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| Descripteurs | Glacial epoch -- Nunavut. Geological time -- Nunavut. Glacial landforms -- Nunavut. Époque glaciaire -- Nunavut. Géochronologie -- Nunavut. Géomorphologie glaciaire -- Nunavut. |
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