A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet : geological evidence, current measurements, and...: M183-2/8198E-PDF
"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.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.836444&sl=0
| Department/Agency | Canada. Natural Resources Canada, issuing body. Geological Survey of Canada, issuing body. |
|---|---|
| Title | A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet : geological evidence, current measurements, and initial oceanographic modelling / E.L. King ... [et al.]. |
| Series title | Geological Survey of Canada, open file ; 8198 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Caption title. Includes bibliographical references. |
| Publishing information | [Ottawa] : Natural Resources Canada, 2017. |
| Author / Contributor | King, Edward L. (Edward Louis), 1920- contributor. |
| Description | 1 p. : charts (mostly col.), col. ill., col. maps |
| Catalogue number |
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| Departmental catalogue number | 299691 |
| Subject terms | Ocean floor Erosion Geomorphology Oceanography Surficial geology |