00000nam 2200000za 4500 9.836444 CaOODSP 20251031142447 cr ||||||||||| 170509s2017 oncabd ob f000 0 eng d CaOODSP eng n-cn--- n-cn-nt M183-2/8198E-PDF A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet [electronic resource] : geological evidence, current measurements, and initial oceanographic modelling / E.L. King ... [et al.]. [Ottawa] : Natural Resources Canada, 2017. 1 p. : charts (mostly col.), col. ill., col. maps Geological Survey of Canada, open file ; 8198 Caption title. Includes bibliographical references. "Removal of several metres thickness of stratified muds is recognized from penetration echosounder data along a narrow belt, 1-8km wide along the Beaufort Sea shelf break (100-200m water depth). A corresponding zone of non-deposition (bypass) is bound by blankets of mud thickening away from the erosion/non-deposition belt. Long-term oceanographic moorings have previously demonstrated periodic currents capable of mud re-suspension near the shelf break. Seabed instrumented measurement of the current and its effects on the mud behavior are pending. Radiocarbon dating indicates the erosion began about 6000 years ago. A combination of geologic, oceanographic current data and 3-D oceanographic modelling approaches converge to indicate a strong birth/acceleration of the current at that time, presently recognized as the Beaufort Shelf-break Jet (BSJ). The study also helps constrain sediment structural disturbance rates from seabed fluid/gas seeps in the area”--Summary provided by publisher. gccst Ocean floor gccst Erosion gccst Geomorphology gccst Oceanography gccst Surficial geology King, Edward L.‏ ‎ (Edward Louis),‏ ‎ 1920- contributor. Canada. Natural Resources Canada, issuing body. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8198 (CaOODSP)9.506878 PDF 56.77 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-2/M183-2-8198-eng.pdf 299691