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The Last Glacial Maximum Balearic Abyssal Plain megabed revisited

View ORCID ProfileAntonio Cattaneo, View ORCID ProfileShray Badhani, Cristina Caradonna, View ORCID ProfileMassimo Bellucci, View ORCID ProfileEstelle Leroux, View ORCID ProfileNathalie Babonneau, View ORCID ProfileSébastien Garziglia, View ORCID ProfileJeffrey Poort, View ORCID ProfileGrigorii G. Akhmanov, Germain Bayon, View ORCID ProfileBernard Dennielou, Gwenäel Jouet, Sébastien Migeon, View ORCID ProfileMarina Rabineau, View ORCID ProfileLaurence Droz and Michael Clare
Geological Society, London, Special Publications, 500, 341-357, 14 May 2020, https://doi.org/10.1144/SP500-2019-188
Antonio Cattaneo
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Lead)], [Methodology (Equal)], [Resources (Lead)], [Supervision (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
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  • ORCID record for Antonio Cattaneo
  • For correspondence: antonio.cattaneo@ifremer.fr
Shray Badhani
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Methodology (Equal)], [Software (Lead)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • ORCID record for Shray Badhani
Cristina Caradonna
3Dipartimento di Matematica e Geoscienze, Università di Trieste, 34128 Trieste, Italy
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Methodology (Supporting)], [Software (Equal)], [Writing - Review & Editing (Supporting)]
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Massimo Bellucci
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
3Dipartimento di Matematica e Geoscienze, Università di Trieste, 34128 Trieste, Italy
Roles: [Formal analysis (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for Massimo Bellucci
Estelle Leroux
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Funding acquisition (Equal)], [Software (Equal)], [Supervision (Lead)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Estelle Leroux
Nathalie Babonneau
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Nathalie Babonneau
Sébastien Garziglia
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Data curation (Equal)], [Methodology (Lead)], [Software (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
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Jeffrey Poort
4Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005 Paris, France
Roles: [Conceptualization (Equal)], [Funding acquisition (Lead)], [Project administration (Lead)], [Supervision (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for Jeffrey Poort
Grigorii G. Akhmanov
5Faculty of Geology, Lomonosov Moscow State University, 119992 Moscow, Russia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Investigation (Supporting)], [Methodology (Equal)], [Software (Equal)], [Visualization (Lead)]
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Germain Bayon
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Supporting)], [Methodology (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Supporting)]
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Bernard Dennielou
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Methodology (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Equal)]
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Gwenäel Jouet
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Supporting)], [Writing - Review & Editing (Supporting)]
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Sébastien Migeon
6Université Côte d'Azur, CNRS, OCA, IRD, Géoazur (UMR7329), 06560 Valbonne, France
7Sorbonne Université, UFR939, 06230 Villefranche-sur-Mer, France
Roles: [Conceptualization (Equal)], [Data curation (Equal)], [Funding acquisition (Equal)], [Investigation (Lead)], [Project administration (Equal)], [Resources (Equal)], [Supervision (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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Marina Rabineau
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Supporting)], [Formal analysis (Supporting)], [Funding acquisition (Equal)], [Resources (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for Marina Rabineau
Laurence Droz
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Funding acquisition (Equal)], [Investigation (Equal)], [Supervision (Lead)], [Writing - Review & Editing (Supporting)]
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Michael Clare
8National Oceanography Centre, University of Southampton Waterfront Campus, Southampton SO14 3ZH, UK
Roles: [Conceptualization (Equal)], [Data curation (Lead)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Equal)]
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Abstract

Megabeds are thick sedimentary layers extending over thousands of square kilometres in deep-sea basins and are thought to result from large slope failures triggered by major external events. Such deposits have been found in at least three areas of the Mediterranean Sea. Although their discovery dates back to the early 1980s, many questions remain concerning their initiation, source area, extent and the nature of their emplacement. One of the largest previously documented megabeds was emplaced during the Last Glacial Maximum across the Balearic Abyssal Plain, with a thickness of 8–10 m in water depths of up to 2800 m.

New 3.5 kHz sub-bottom profiles and sediment cores provide greater constraints on the lateral variability of the megabed and allow it to be mapped beyond previous estimates, with a revised areal extent of 90 000–100 000 km2. The megabed terminations show a gradual pinchout to the west and an abrupt eastward termination against the steep Sardinia margin. The megabed presents, in seismic profiles and sediment cores, a tripartite subdivision, which most likely corresponds to the changes in flow regimes across the basin, with a central area of sandy facies and an erosional base oriented NNE–SSW; this allows renewed discussions about the sources and triggers of the megabed.

  • © 2020 The Author(s). Published by The Geological Society of London. All rights reserved
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Geological Society, London, Special Publications: 500 (1)
Geological Society, London, Special Publications
Volume 500
2020
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The Last Glacial Maximum Balearic Abyssal Plain megabed revisited

Antonio Cattaneo, Shray Badhani, Cristina Caradonna, Massimo Bellucci, Estelle Leroux, Nathalie Babonneau, Sébastien Garziglia, Jeffrey Poort, Grigorii G. Akhmanov, Germain Bayon, Bernard Dennielou, Gwenäel Jouet, Sébastien Migeon, Marina Rabineau, Laurence Droz and Michael Clare
Geological Society, London, Special Publications, 500, 341-357, 14 May 2020, https://doi.org/10.1144/SP500-2019-188
Antonio Cattaneo
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Lead)], [Methodology (Equal)], [Resources (Lead)], [Supervision (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Antonio Cattaneo
  • For correspondence: antonio.cattaneo@ifremer.fr
Shray Badhani
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Methodology (Equal)], [Software (Lead)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Shray Badhani
Cristina Caradonna
3Dipartimento di Matematica e Geoscienze, Università di Trieste, 34128 Trieste, Italy
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Methodology (Supporting)], [Software (Equal)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Massimo Bellucci
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
3Dipartimento di Matematica e Geoscienze, Università di Trieste, 34128 Trieste, Italy
Roles: [Formal analysis (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Massimo Bellucci
Estelle Leroux
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Funding acquisition (Equal)], [Software (Equal)], [Supervision (Lead)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • ORCID record for Estelle Leroux
Nathalie Babonneau
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • Search for this author on this site
  • ORCID record for Nathalie Babonneau
Sébastien Garziglia
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Data curation (Equal)], [Methodology (Lead)], [Software (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for Sébastien Garziglia
Jeffrey Poort
4Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005 Paris, France
Roles: [Conceptualization (Equal)], [Funding acquisition (Lead)], [Project administration (Lead)], [Supervision (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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  • ORCID record for Jeffrey Poort
Grigorii G. Akhmanov
5Faculty of Geology, Lomonosov Moscow State University, 119992 Moscow, Russia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Investigation (Supporting)], [Methodology (Equal)], [Software (Equal)], [Visualization (Lead)]
  • Find this author on Google Scholar
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  • ORCID record for Grigorii G. Akhmanov
Germain Bayon
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Supporting)], [Methodology (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Supporting)]
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  • Search for this author on this site
Bernard Dennielou
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Methodology (Equal)], [Supervision (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • ORCID record for Bernard Dennielou
Gwenäel Jouet
1Unité géosciences marines, IFREMER, GM, F-29280 Plouzané, France
Roles: [Conceptualization (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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  • Search for this author on this site
Sébastien Migeon
6Université Côte d'Azur, CNRS, OCA, IRD, Géoazur (UMR7329), 06560 Valbonne, France
7Sorbonne Université, UFR939, 06230 Villefranche-sur-Mer, France
Roles: [Conceptualization (Equal)], [Data curation (Equal)], [Funding acquisition (Equal)], [Investigation (Lead)], [Project administration (Equal)], [Resources (Equal)], [Supervision (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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Marina Rabineau
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Supporting)], [Formal analysis (Supporting)], [Funding acquisition (Equal)], [Resources (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
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Laurence Droz
2UMR 6538, CNRS, Université de Brest, Université Bretagne-Sud, Géosciences Océan (LGO), F-29280 Plouzané, France
Roles: [Conceptualization (Equal)], [Formal analysis (Equal)], [Funding acquisition (Equal)], [Investigation (Equal)], [Supervision (Lead)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for Laurence Droz
Michael Clare
8National Oceanography Centre, University of Southampton Waterfront Campus, Southampton SO14 3ZH, UK
Roles: [Conceptualization (Equal)], [Data curation (Lead)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Supporting)], [Writing - Review & Editing (Equal)]
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The Last Glacial Maximum Balearic Abyssal Plain megabed revisited

Antonio Cattaneo, Shray Badhani, Cristina Caradonna, Massimo Bellucci, Estelle Leroux, Nathalie Babonneau, Sébastien Garziglia, Jeffrey Poort, Grigorii G. Akhmanov, Germain Bayon, Bernard Dennielou, Gwenäel Jouet, Sébastien Migeon, Marina Rabineau, Laurence Droz and Michael Clare
Geological Society, London, Special Publications, 500, 341-357, 14 May 2020, https://doi.org/10.1144/SP500-2019-188
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