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TitleBedrock geology of Hudson Strait and Ungava Bay
DownloadFree download (whole publication) (zip 57127 KB)
AuthorMacLean, B
SourceMarine geology of Hudson Strait and Ungava Bay, Eastern Arctic Canada: Late Quaternary sediments, depositional environments, and late glacial-deglacial history derived from marine and terrestrial studies; by Maclean, B (ed.); Geological Survey of Canada, Bulletin 566, 2001 p. 65-69, https://doi.org/10.4095/212200
Year2001
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in MacLean, B; (2001). Marine geology of Hudson Strait and Ungava Bay, Eastern Arctic Canada: Late Quaternary sediments, depositional environments, and late glacial-deglacial history derived from marine and terrestrial studies, Geological Survey of Canada, Bulletin no. 566
File formatpdf
ProvinceNorthern offshore region; Quebec; Newfoundland and Labrador
NTS24I; 24J; 24K; 24L; 24M; 24N; 24O; 24P; 34I; 34J; 34K; 34L; 34M; 34N; 34O; 34P; 25; 35
AreaHudson Strait; Ungava Bay; Labrador
Lat/Long WENS-80.0000 -64.0000 64.0000 58.0000
Lat/Long WENS-115.5000 -115.5000 49.7500 49.2500
Lat/Long WENS-86.0000 -80.0000 52.0000 50.0000
Lat/Long WENS-135.5000 -134.5000 66.0000 65.7500
Subjectsgeophysics; structural geology; general geology; bedrock geology; seismic reflection surveys; boreholes; carbonate rocks; sedimentary rocks; metamorphic rocks; grabens; structural features; structural basins; basin analysis; Paleozoic; Precambrian; Mesozoic; Phanerozoic
Illustrationssketch maps; seismic reflection profiles
Image
Released2001 04 01
AbstractThis paper summarizes information regarding the bedrock geology underlying Hudson Strait and Ungava Bay interpreted from seismic reflection data together with shallow borehole information, published data from adjoining terrestrial areas, and from an exploratory well on Akpatok Island. Hudson Strait is underlain primarily by Lower Paleozoic sedimentary rocks (mainly calcareous carbonate rocks) that contact Precambrian metamorphic rocks of the adjacent land masses not far from the coasts of Baffin Island and Ungava and Labrador peninsulas. These sedimentary rocks also form the central platform in Ungava Bay. Younger strata, possibly of Mesozoic age occur locally in Eastern basin and their presence has also been postulated in parts of western and southwestern Hudson Strait. Three half-graben structures, downfaulted against older rocks at their southern margins, form prominent structural features in the floor of Hudson Strait. Phanerozoic (mainly Lower Paleozoic) sedimentary rocks thicken southward in these structures reaching 2000 m or more in Eastern basin. These basins have been sites for deposition of Quaternary sediments that locally reach more than 100 m in thickness. Calcareous sediments and erratics derived from glacial erosion of the Paleozoic strata are important markers in interpreting ice-flow patterns in the region and sediment dispersal seaward.
GEOSCAN ID212200