Flow behaviour of a giant landslide and debris flow entering Agadir Canyon, NW Africa
Flow behaviour of a giant landslide and debris flow entering Agadir Canyon, NW Africa
Agadir Canyon is one of the largest submarine canyons in the World, supplying giant submarine sediment gravity flows to the Agadir Basin and the wider Moroccan Turbidite System. While the Moroccan Turbidite System is extremely well investigated, almost no data from the source region, i.e. the Agadir Canyon, are available. New acoustic and sedimentological data of the Agadir Canyon area were collected during RV Maria S. Merian Cruise 32 in autumn 2013. The data show a prominent headwall area around 200 km south of the head of Agadir Canyon. The failure occurred along a pronounced weak layer in a sediment wave field. The slab-type failure rapidly disintegrated and transformed into a debris flow, which entered Agadir Canyon at 2500 m water depth. Interestingly, the debris flow did not disintegrate into a turbidity current when it entered the canyon despite a significant increase in slope angle. Instead, the material was transported as debrite for at least another 200 km down the canyon. It is unlikely that this giant debris flow significantly contributed to the deposits in the wider Moroccan Turbidite System.
Submarine landslide, Debris flow, Acoustic imaging, Agadir Canyon
145-154
Krastel, Sebastian
4d9bf243-610a-4875-8c03-cd975c9f8542
Wynn, Russell B.
72ccd765-9240-45f8-9951-4552b497475a
Feldens, Peter
ed867c86-da0b-478e-a889-300ce39f6453
Schürer, Anke
c2a9fe58-ce9f-4070-ad77-28e2b4f1d303
Böttner, Christoph
e35e2e9c-3e87-48b2-a5bb-a68cd68266be
Stevenson, C.
33ec763a-ea2c-41a8-a0f2-9325b4be0d55
Cartigny, Matthieu J.B.
d252d7b1-16c6-47b1-bf86-8087070934ce
Hühnerbach, Veit
561ed5da-ec90-4a96-986a-f391c6c37d4c
Unverricht, Daniel
b70b356c-29eb-4886-8bf1-6d1057aebf57
2016
Krastel, Sebastian
4d9bf243-610a-4875-8c03-cd975c9f8542
Wynn, Russell B.
72ccd765-9240-45f8-9951-4552b497475a
Feldens, Peter
ed867c86-da0b-478e-a889-300ce39f6453
Schürer, Anke
c2a9fe58-ce9f-4070-ad77-28e2b4f1d303
Böttner, Christoph
e35e2e9c-3e87-48b2-a5bb-a68cd68266be
Stevenson, C.
33ec763a-ea2c-41a8-a0f2-9325b4be0d55
Cartigny, Matthieu J.B.
d252d7b1-16c6-47b1-bf86-8087070934ce
Hühnerbach, Veit
561ed5da-ec90-4a96-986a-f391c6c37d4c
Unverricht, Daniel
b70b356c-29eb-4886-8bf1-6d1057aebf57
Krastel, Sebastian, Wynn, Russell B., Feldens, Peter, Schürer, Anke, Böttner, Christoph, Stevenson, C., Cartigny, Matthieu J.B., Hühnerbach, Veit and Unverricht, Daniel
(2016)
Flow behaviour of a giant landslide and debris flow entering Agadir Canyon, NW Africa.
In,
Lamarche, Geoffroy, Mountjoy, Joshu, Bull, Suzanne, Hubble, Tom, Krastel, Sebastian, Lane, Emily, Micallef, Aaron, Moscardelli, Lorena, Mueller, Christof, Pecher, Ingo and Woelz, Susanne
(eds.)
Submarine Mass Movements and their Consequences: 7th International Symposium.
(Advances in Natural and Technological Hazards Research, 41)
Cham, CH.
Springer Cham, .
(doi:10.1007/978-3-319-20979-1_14).
Record type:
Book Section
Abstract
Agadir Canyon is one of the largest submarine canyons in the World, supplying giant submarine sediment gravity flows to the Agadir Basin and the wider Moroccan Turbidite System. While the Moroccan Turbidite System is extremely well investigated, almost no data from the source region, i.e. the Agadir Canyon, are available. New acoustic and sedimentological data of the Agadir Canyon area were collected during RV Maria S. Merian Cruise 32 in autumn 2013. The data show a prominent headwall area around 200 km south of the head of Agadir Canyon. The failure occurred along a pronounced weak layer in a sediment wave field. The slab-type failure rapidly disintegrated and transformed into a debris flow, which entered Agadir Canyon at 2500 m water depth. Interestingly, the debris flow did not disintegrate into a turbidity current when it entered the canyon despite a significant increase in slope angle. Instead, the material was transported as debrite for at least another 200 km down the canyon. It is unlikely that this giant debris flow significantly contributed to the deposits in the wider Moroccan Turbidite System.
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More information
Published date: 2016
Keywords:
Submarine landslide, Debris flow, Acoustic imaging, Agadir Canyon
Organisations:
Marine Geoscience
Identifiers
Local EPrints ID: 401565
URI: http://eprints.soton.ac.uk/id/eprint/401565
PURE UUID: 509020f3-eb1a-464b-bb3d-a52482657bcc
Catalogue record
Date deposited: 13 Oct 2016 14:45
Last modified: 15 Mar 2024 02:49
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Contributors
Author:
Sebastian Krastel
Author:
Russell B. Wynn
Author:
Peter Feldens
Author:
Anke Schürer
Author:
Christoph Böttner
Author:
C. Stevenson
Author:
Matthieu J.B. Cartigny
Author:
Veit Hühnerbach
Author:
Daniel Unverricht
Editor:
Geoffroy Lamarche
Editor:
Joshu Mountjoy
Editor:
Suzanne Bull
Editor:
Tom Hubble
Editor:
Sebastian Krastel
Editor:
Emily Lane
Editor:
Aaron Micallef
Editor:
Lorena Moscardelli
Editor:
Christof Mueller
Editor:
Ingo Pecher
Editor:
Susanne Woelz
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