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Bedforms in the southern submarine canyons of the Balearic Islands (Western Mediterranean) interpreted as cyclic steps

Bedforms in the southern submarine canyons of the Balearic Islands (Western Mediterranean) interpreted as cyclic steps
Bedforms in the southern submarine canyons of the Balearic Islands (Western Mediterranean) interpreted as cyclic steps
Multibeam bathymetric data collected along the Menorca Channel (Balearic Islands) for a depth range of 70–850 m revealed the occurrence of bedforms along some of the submarine canyons of the Balearic southern slope. The four main canyons presented in this study display a linear to sinuous geometry, incising the slope for up to 170 m and carving the shelf-edge at a depth of 110 m. Bedforms along these canyons are more developed along the two northernmost canyons, particularly within the 300–700 m depth range. The crescentic shape of the bedforms and their wavelengths of between 120 and 210 m resemble the morphology of bedforms found in other submarine channels and canyons. In line with these previously observed bedforms, we here explore the possibility that the bedforms in the canyons could be interpreted as cyclic steps formed by supercritical turbidity currents. Assuming this interpretation holds, then some simple modelling would allow us to give rough estimates of velocity and thickness of the flows that formed the cyclic steps.
223-228
Springer International Publishing
Cartigny, Matthieu
bda1b79b-7e11-4790-8238-b86d80a88bb3
Lo Iacono, Claudio
f5638713-032b-4783-a83a-da217b64d0bf
Urgeles, Roger
54eb52b9-4519-464e-8755-b3afbb52b610
Maria, Druet
e256a82f-62aa-40bc-af3a-0b26a9b345b7
Acosta, Juan
4209fc1f-e921-4224-80d0-976511c65360
Guillen, Jorge
Acosta, Juan
Chiocci, Francesco Latino
Palanques, Albert
Cartigny, Matthieu
bda1b79b-7e11-4790-8238-b86d80a88bb3
Lo Iacono, Claudio
f5638713-032b-4783-a83a-da217b64d0bf
Urgeles, Roger
54eb52b9-4519-464e-8755-b3afbb52b610
Maria, Druet
e256a82f-62aa-40bc-af3a-0b26a9b345b7
Acosta, Juan
4209fc1f-e921-4224-80d0-976511c65360
Guillen, Jorge
Acosta, Juan
Chiocci, Francesco Latino
Palanques, Albert

Cartigny, Matthieu, Lo Iacono, Claudio, Urgeles, Roger, Maria, Druet and Acosta, Juan (2017) Bedforms in the southern submarine canyons of the Balearic Islands (Western Mediterranean) interpreted as cyclic steps. In, Guillen, Jorge, Acosta, Juan, Chiocci, Francesco Latino and Palanques, Albert (eds.) Atlas of Bedforms in the Western Mediterranean. Cham, Switzerland. Springer International Publishing, pp. 223-228. (doi:10.1007/978-3-319-33940-5_34).

Record type: Book Section

Abstract

Multibeam bathymetric data collected along the Menorca Channel (Balearic Islands) for a depth range of 70–850 m revealed the occurrence of bedforms along some of the submarine canyons of the Balearic southern slope. The four main canyons presented in this study display a linear to sinuous geometry, incising the slope for up to 170 m and carving the shelf-edge at a depth of 110 m. Bedforms along these canyons are more developed along the two northernmost canyons, particularly within the 300–700 m depth range. The crescentic shape of the bedforms and their wavelengths of between 120 and 210 m resemble the morphology of bedforms found in other submarine channels and canyons. In line with these previously observed bedforms, we here explore the possibility that the bedforms in the canyons could be interpreted as cyclic steps formed by supercritical turbidity currents. Assuming this interpretation holds, then some simple modelling would allow us to give rough estimates of velocity and thickness of the flows that formed the cyclic steps.

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e-pub ahead of print date: 24 September 2016
Published date: 1 January 2017
Organisations: Marine Geoscience

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Local EPrints ID: 407597
URI: http://eprints.soton.ac.uk/id/eprint/407597
PURE UUID: 8046051a-1dcc-403e-95ff-24b6578a99d9

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Date deposited: 16 Apr 2017 16:59
Last modified: 13 Mar 2019 20:05

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Contributors

Author: Matthieu Cartigny
Author: Claudio Lo Iacono
Author: Roger Urgeles
Author: Druet Maria
Author: Juan Acosta
Editor: Jorge Guillen
Editor: Juan Acosta
Editor: Francesco Latino Chiocci
Editor: Albert Palanques

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