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TitleApplications of seafloor mapping on the Canadian Atlantic continental shelf
AuthorTodd, B J; Shaw, J
SourceGeoscience Canada vol. 36, no. 2, 2009 p. 81-94
Year2009
Alt SeriesEarth Sciences Sector, Contribution Series 20080709
Documentserial
Lang.English
Mediapaper
ProvinceEastern offshore region
AreaScotian Shelf; Placentia Bay; Milne Bank; Minas Passage; German Bank; Georges Bank
Lat/Long WENS -72.0000 -55.0000 46.0000 40.0000
Subjectsmarine geology; geophysics; environmental geology; surficial geology/geomorphology; mapping techniques; seafloor topography; seabottom topography; continental shelf; biomes; geophysical surveys; bathymetry; biological communities; biota; biotic diversification; sea level changes; sea level fluctuations; Scallops; Cenozoic; Quaternary
Illustrationslocation maps; histograms; graphs; images
ProgramGeoscience for Oceans Management
AbstractCanada's final mapping frontier is its offshore territory. Compared to Canada's landmass, only a limited portion of Canada's seafloor has been mapped using the modern technology of multibeam sonar. Where this high-resolution mapping technique has been applied on Canada's Atlantic continental margin, insight has been gained into the studies of seafloor habitat mapping, Quaternary history and sea-level change, sediment bedforms and dynamics, and seafloor conditions for in-stream tidal power. Seafloor habitat mapping in Canada provides the knowledge base to effectively manage offshore fisheries, evaluate marine protected areas, minimize the environmental impact of offshore development, and resolve seafloor-use conflicts. Multibeam sonar mapping has revealed a complex glacial landsystem developed on the Canadian Atlantic continental shelf and supports the concept of the late glacial maximum reaching the shelf edge. The application of multibeam sonar technology offers unprecedented images of bedform geomorphology and this knowledge is crucial to understanding sediment mobility and its effect on seafloor habitat, engineering, and infrastructure. To minimize the risk to engineering infrastructure on the seabed, planning of tidal-energy developments in regions of large tidal range requires detailed information about the water depth, seafloor substrate and sediment mobility, and longterm seabed change garnered using multibeam sonar mapping techniques.
GEOSCAN ID226507