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TitleSea Marc I sidescan sonar survey line across the Southeast Baffin Shelf and Slope, Northwest Labrador Sea
AuthorPraeg, D B; Shor, A N; MacLean, B; Piper, D J W
SourceGeological Survey of Canada, Open File 1254, 1987, 16 pages (18 sheets), (Open Access)
Documentopen file
MapsPublication contains 9 maps
Map Info.geophysical, seismic surveys, 1:40,000
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthern offshore region
AreaBaffin Island
Lat/Long WENS -70.0000 -58.0000 64.0000 61.0000
Subjectssurficial geology/geomorphology; geophysics; bathymetry; continental shelf; continental slope; geophysical surveys; side-scan sonar; sonar surveys; seismic surveys; seismic profiles; lineations; sediments; Gjoa Spur; Resolution Basin; Tertiary
Natural Resources Canada Library - Ottawa (Earth Sciences)
Natural Resources Canada library - Calgary (Earth Sciences)
Natural Resources Canada library - Vancouver (Earth Sciences)
Geological Survey of Canada (Atlantic)
Released1987 05 01; 2018 06 19
AbstractThis open file report presents the results of a 280 km long, 5 km wide swath Sea MARC I sidescan sonar survey line run across water depths of 300-2000 m off southeastern Baffin Island (latitude 62°20'N). The report includes (1) photoreproductions of the sonograms, at 1:40,000 scale, (2) hand-drawn interpretations, including bathymetry, and (3) a descriptive text. The seabed of the continental shelf and upper continental slope is dominated by iceberg scours (furrows and pits), which display variations in abundance, orientation, size and definition; ponded sediments and surface expressions of the subsurface bedrock are also observed locally. Iceberg scours are present to a maximum water depth of approximately 715 m on the upper continental slope. The continental slope below this depth appears largely featureless except across the southern tip of the Gjoa Spur, which contains ponded sediments and slope-transverse lineations related to mass movement in association with gradients up to 20° and relief up to 180 m.