Mass wasting along the Labrador shelf margin: Submersible observations |
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| Authors: | H W Josenhans J V Barrie L A Kiely |
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| Institution: | (1) Geological Survey of Canada, Atlantic Geoscience Centre, Bedford Institute of Oceanography, P.O. Box 1006, B2Y 4A2 Dartmouth, Nova Scotia, Canada;(2) Centre for Cold Ocean Resources Engineering, Memorial University of Newfoundland, A1B 3X5 St. John's, Newfoundland, Canada |
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| Abstract: | A dissected valley system along the central portion of the Labrador upper slope has been investigated using geophysical and submersible observations. The complex slope is a result of mass wasting on a steep slope gradient which appears to be independent of processes on the bank top. Small scale slumping and creep, a result of biological activity and iceberg rafting, and large-scale debris flows occur presently below 750 m water depth. A recent debris flow in the valley was examined in detail. Degraded iceberg scour marks are the principal sea bed feature above 750 m water depth. |
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