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TitleSurficial geology and benthic habitat of the German Bank seabed, Scotian Shelf, Canada
AuthorTodd, B J; Kostylev, V E; Valentine, P C
SourceContinental Shelf Research 31, 2, 2011 p. S54-S68, https://doi.org/10.1016/j.csr.2010.07.008
Year2011
Alt SeriesEarth Sciences Sector, Contribution Series 20090340
PublisherElsevier BV
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceEastern offshore region
NTS20O/01; 20O/02; 20O/07; 20O/08; 20O/09; 20O/10; 20P/04; 20P/05
AreaScotian Shelf; German Bank
Lat/Long WENS -66.7500 -65.5000 43.6667 43.0000
Subjectsgeophysics; surficial geology/geomorphology; surface geology; geophysical surveys; sonar surveys; bathymetry; side-scan sonar; seismic surveys; seismic interpretations; seismic reflection surveys; seafloor topography; faunas; faunal studies; faunal assemblages; faunal distribution; oceanographic surveys; salinity; seabottom temperatures; glacial deposits; tills; sands; gravels; glacial landforms; statistical analyses; habitat mapping; habitat
Illustrationslocation maps; geological sketch maps; photographs
ProgramOffshore Renewable Energy, Offshore Geoscience
AbstractTo provide the scientific context for management of a newly opened scallop fishing ground, surficial geology and benthic habitats were mapped on German Bank on the southern Scotian Shelf off Atlantic Canada. To provide a seamless regional dataset, multibeam sonar surveys covered 5320 km2 of the bank in water depths of 30--250 m and provided 5 m horizontal resolution bathymetry and backscatter
strength. Geoscience data included high-resolution geophysical profiles (seismic reflection and sidescan sonar) and seabed sediment samples. Geological interpretation revealed that bedrock is exposed at the seafloor on much of German Bank and is overlain in places by glacial and postglacial sediment. Biological data included seafloor video transects and photographs from which 127 taxa of visible
megabenthos were identified. Trawl bycatch data were obtained from government annual research surveys. Statistical analysis of these two datasets and a suite of oceanographic environmental variables demonstrated that significantly different fauna exist on bedrock, glacial sediment and postglacial sediment.
GEOSCAN ID261495