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TitleSeafloor geomorphology and benthic habitat of the German Bank glaciated shelf, Atlantic Canada
 
AuthorBrown, C J; Todd, B JORCID logo; Smith, S J; Sameoto, J A
SourceSeafloor geomorphology as benthic habitat, GeoHab atlas of seafloor geomorphic features and benthic habitats; by Harris, P T (ed.); Baker, E (ed.); 2019 p. 675-690, https://doi.org/10.1016/B978-0-12-814960-7.00040-3
Image
Year2019
Alt SeriesNatural Resources Canada, Contribution Series 20180234
PublisherElsevier
Edition2
Documentbook
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceNova Scotia; Eastern offshore region
AreaGerman Bank; Scotian Shelf; Atlantic Ocean; Gulf of Maine
Lat/Long WENS -66.8333 -65.4167 43.7500 42.9167
Subjectsmarine geology; surficial geology/geomorphology; geophysics; Science and Technology; Nature and Environment; continental margins; continental shelf; marine sediments; postglacial deposits; sands; gravels; glacial deposits; tills; silts; seafloor topography; geophysical surveys; acoustic surveys, marine; side-scan sonar; bathymetry; seismic interpretations; benthos; faunal assemblages; glacial history; glaciation; photography; modelling; biological communities; Wisconsinan Glacial Stage; Scallops; Habitats; lag deposits (washed scoured lag); glaciomarine sediments; Marine biology
Illustrationslocation maps; geoscientific sketch maps; seismic reflection profiles; bathymetric profiles; tables; photographs; plots
ProgramOffshore Geoscience
Released2019 11 08
AbstractAn area of 5320 km2 in water depths of 30-250 m has been mapped on German Bank on the southern Scotian Shelf in Atlantic Canada. The Scotian Shelf is a formerly glaciated continental margin characterized by a topographically rugged inner shelf. Bedrock is exposed at the seafloor on much of German Bank. Ice-contact sediment (till) was deposited beneath or at the margins of the ice sheet directly onto bedrock during the Wisconsinan glaciation and occurs as a widespread sediment blanket. Ice-distal glaciomarine silt overlies the older till and is primarily confined to small basins on the bank. Limited accumulations of postglacial sediments are composed of well-sorted sand, grading to rounded and subrounded gravel. Analysis of seafloor photographs and underwater video revealed broadscale gradients in benthic fauna composition across the bank. Surficial geology, broad biophysical ('benthoscape'), and modeled scallop habitat suitability maps are presented for the area, generated using a variety of methods. The combined use of these different maps is offering benefits for use in fisheries management in this area.
Summary(Plain Language Summary, not published)
An area of 5320 square kilometres in water depths of 30 to 250 m was mapped on German Bank on the southern Scotian Shelf in Atlantic Canada. The Scotian Shelf is a formerly glaciated continental margin with a rugged inner shelf. Analysis of seafloor photographs and underwater video revealed broad-scale gradients in benthic fauna composition across the bank. Surficial geology, biophysical and modelled scallop habitat suitability maps are presented for the area. The combined use of these different maps are offering benefits for use in fisheries management in this area.
GEOSCAN ID311329

 
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