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TitleNew contributions to the ice-flow chronology in the Boothia-Lancaster ice-stream catchment area, Nunavut
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTremblay, TORCID logo; Lamothe, M
SourceSurficial geology of northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions; by McMartin, IORCID
logo (ed.); Geological Survey of Canada, Bulletin 611, 2023 p. 167-199, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedThis publication is contained in Surficial geology of northern Canada: a summary of Geo-mapping for Energy and Minerals program contributions
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf
NTS26; 27; 28; 36; 37; 38; 46; 47; 48; 56; 57; 58; 66; 67; 68; 76; 77; 78
Lat/Long WENS-105.0000 -68.0000 75.0000 64.0000
Subjectsgeochronology; Science and Technology; Nature and Environment; surficial geology/geomorphology; stratigraphy; ice flow; glacial history; glaciology; deglaciation; ice movement; ice retreat; Boothia-Lancaster ice stream
Illustrationslocation maps; photographs; diagrams
ProgramGEM2: Geo-mapping for Energy and Minerals GEM Program Management
Released2023 02 16
AbstractWithin the Boothia-Lancaster ice stream (BLIS) catchment area, ice-flow patterns were reconstructed based on the synthesis of striation directions and crosscutting 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 data sets 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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