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Large landslides on passive continental margins: processes, hypotheses and outstanding questions

Large landslides on passive continental margins: processes, hypotheses and outstanding questions
Large landslides on passive continental margins: processes, hypotheses and outstanding questions
The volume, area affected, and runout of submarine landslides can exceed those of terrestrial events by two orders of magnitude. The Storegga Slide off Norway affected an area the size of Scotland and moved enough sediment to bury the entire country to a depth of 80 m. Modern geophysics provides a clear picture of large landslides and what their source and depositional areas look like. From this, we can deduce the processes that operated during downslope transport. However, our understanding of many aspects of landslide processes is based on hypotheses that are difficult to test. Elevated pore pressures are essential for landslide initiation on low continental margin slopes, yet understanding of how high pressures are generated or how fluid migration affects slope stability is limited. Sediments may be pre-conditioned for failure by the processes that originally deposited them, e.g., through creation of weak layers, but the processes and parameters that might control this are largely unknown.
9789048130702
28
153-165
Springer
Masson, D.G.
edd44c8b-38ca-45fb-8d0d-ac8365748a45
Wynn, R.B.
72ccd765-9240-45f8-9951-4552b497475a
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Mosher, D.C.
Shipp, C.
Moscardelli, L.
Chaytor, J.
Baxter, C.
Lee, H.
Urgeles, R.
Masson, D.G.
edd44c8b-38ca-45fb-8d0d-ac8365748a45
Wynn, R.B.
72ccd765-9240-45f8-9951-4552b497475a
Talling, P.J.
1cbac5ec-a9f8-4868-94fe-6203f30b47cf
Mosher, D.C.
Shipp, C.
Moscardelli, L.
Chaytor, J.
Baxter, C.
Lee, H.
Urgeles, R.

Masson, D.G., Wynn, R.B. and Talling, P.J. (2010) Large landslides on passive continental margins: processes, hypotheses and outstanding questions. Mosher, D.C., Shipp, C., Moscardelli, L., Chaytor, J., Baxter, C., Lee, H. and Urgeles, R. (eds.) In Submarine mass movements and their consequences: 4th International Symposium, Austin, Texas, 9th-11th November 2009. Springer. pp. 153-165 . (doi:10.1007/978-90-481-3071-9).

Record type: Conference or Workshop Item (Paper)

Abstract

The volume, area affected, and runout of submarine landslides can exceed those of terrestrial events by two orders of magnitude. The Storegga Slide off Norway affected an area the size of Scotland and moved enough sediment to bury the entire country to a depth of 80 m. Modern geophysics provides a clear picture of large landslides and what their source and depositional areas look like. From this, we can deduce the processes that operated during downslope transport. However, our understanding of many aspects of landslide processes is based on hypotheses that are difficult to test. Elevated pore pressures are essential for landslide initiation on low continental margin slopes, yet understanding of how high pressures are generated or how fluid migration affects slope stability is limited. Sediments may be pre-conditioned for failure by the processes that originally deposited them, e.g., through creation of weak layers, but the processes and parameters that might control this are largely unknown.

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More information

Published date: 2010
Venue - Dates: 4th International Symposium on Submarine Mass Movements and their Consequences, Austin TX, USA, 2009-11-09 - 2009-11-11
Organisations: Marine Geoscience

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Local EPrints ID: 72247
URI: http://eprints.soton.ac.uk/id/eprint/72247
ISBN: 9789048130702
PURE UUID: 081488d1-1722-411e-8e36-ae8f5f891dfa

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Date deposited: 02 Feb 2010
Last modified: 13 Mar 2024 21:23

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Contributors

Author: D.G. Masson
Author: R.B. Wynn
Author: P.J. Talling
Editor: D.C. Mosher
Editor: C. Shipp
Editor: L. Moscardelli
Editor: J. Chaytor
Editor: C. Baxter
Editor: H. Lee
Editor: R. Urgeles

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