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TitleNew contributions to the ice-flow chronology in the Boothia-Lancaster Ice Stream catchment area
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTremblay, TORCID logo; Lamothe, M
SourceGeological Survey of Canada, Preprint 6, 2022, 40 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Mediadigital; on-line
RelatedNRCan photo(s) in this publication
File formatpdf
NTS46; 56; 47; 57; 58A; 58B; 58C; 58D; 58E; 58F; 48A; 48B; 48C; 48D; 48E; 48F; 38B; 38C; 38F
AreaBoothia- Lancaster
Lat/Long WENS -95.0000 -75.0000 75.0000 65.0000
SubjectsNature and Environment; surficial geology/geomorphology; geochronology; ice; ice flow; glacial features; glacial striations
Illustrationslocation maps; bathymetric profiles; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals
Released2022 12 19
AbstractWithin 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.
Summary(Plain Language Summary, not published)
A synthesis of ice flow studies in northern Canada, from Baker Lake to Baffin Island, with the objective of comparing the history of glacial movements between different regions. The compiled studies are generally devoted to the geological interpretations of the marks of erosion of glaciers, the content of transported material in glacial sediments and the landforms indicative of glacial movements. The results are useful for better reconstruction of the glacial epochs and for mineral exploration using glacial sediments.

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