00000nam 2200000zi 4500 9.917090 CaOODSP 20230831105202 m o d f cr mn||||||||| 221108t20222022oncab ob f000 0 eng d 9780660461861 CaOODSP eng rda CaOODSP eng eng fre n-cn-nu M183-7/6-2022E-PDF Tremblay, T. (Tommy) author. New contributions to the ice-flow chronology in the Boothia-Lancaster Ice Stream catchment area / T. Tremblay and M. Lamothe. [Ottawa] : Geological Survey Canada, 2022. ©2022 1 online resource (40 pages) : colour illustrations, maps (chiefly colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Preprint, 2816-7872 ; 6 Includes bibliographical references (pages 33-40). "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. Includes abstracts in English and French. Glacial epoch Nunavut. Geological time Nunavut. Glacial landforms Nunavut. Époque glaciaire Nunavut. Géochronologie Nunavut. Géomorphologie glaciaire Nunavut. Geological Survey of Canada, issuing body. Preprint (Geological Survey of Canada) 6. (CaOODSP)9.913739 PDF 46.33 MB https://publications.gc.ca/collections/collection_2023/rncan-nrcan/M183-7-6-2022-eng.pdf HTML N/A https://doi.org/10.4095/331062