A large late Pleistocene blocky debris flow on the central Scotian Slope

A SeaMARC I side-scan sonar survey on the central Scotian Slope shows a blocky debris flow with high surface roughness between the 1,000 and 2,000 m isobaths, covering an area of about 1,000 km super(2). The flow is at least 20 m thick, occurring as lenses within channels and as sheets on intervalle...

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Bibliographic Details
Published in:Geo-marine letters 1989-01, Vol.9 (3), p.153-160
Main Authors: SHOR, A. N, PIPER, D. J. W
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Marine
Marine geology
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Summary:A SeaMARC I side-scan sonar survey on the central Scotian Slope shows a blocky debris flow with high surface roughness between the 1,000 and 2,000 m isobaths, covering an area of about 1,000 km super(2). The flow is at least 20 m thick, occurring as lenses within channels and as sheets on intervalley areas. The surface reflectivity is variable, with blocks and depressions 50 to 200 m wide and relief of 5 to 20 m. The source zone lies within two canyons on the upper slope and has relatively smooth surface reflectivity, in contrast to the gullied slope to either side.
ISSN:0276-0460
1432-1157
DOI:10.1007/BF02431042