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Geological Society, London, Special Publications; 1998; v. 129; p. 5-17;
DOI: 10.1144/GSL.SP.1998.129.01.02
© 1998 Geological Society of London

Large submarine slides on the NE Faeroe continental margin

Tjeerd C. E. Van Weering1, Tøve Nielsen2, Neil H. Kenyon3, Katja Akentieva4 & Antoon. H. Kuijpers2

1 Netherlands Institute for Sea Research (NIOZ), P.O. Box 59, 1790 AB Den Burg, Texel, The Netherlands
2 GEUS (formerly DGU), Thoravej 8, Copenhagen 2400, Denmark
3 Southampton Oceanography Centre, Southampton SO14 3ZH, UK
4 Moscow State University, Moscow, Russia

High-resolution seismic profiles of the NE Faeroe margin show large-scale slumping and sliding of the middle and lower continental slope, affecting sediments of presumed Miocene, Pliocene and Quaternary age. Mass-flow deposits on the upper slope are partially covered by more recent deposits, presumed to be contourites. A TOBI deep-tow side-scan sonar mosaic, in combination with deep-towed penetrating echosounder results, shows that the slump complex on the upper slope consists of a buried slide scar, bottleneck slides, debris-flow lobes and a number of shallow slides. Sliding at the middle and lower continental slope seems more recent and shows a steep, irregular main slump scar and very large, intact, angular blocks. The base of the slide at the lower continental slope shows numerous narrow and diverging tracks, 10–15 km length, that end at individual blocks. Several types of debris flows have been mapped, some with longitudinal flow fabrics.





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[Abstract] [PDF]