Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles

Type Article
Date 2021-06
Language English
Author(s) Cornée Jean-Jacques1, Münch Philippe2, Philippon Mélody1, Boudagher-Fadel Marcelle3, Quillévéré Frédéric4, Melinte-Dobrinescu Mihaela5, Lebrun Jean-Frédéric1, Gay Aurelien2, Meyer Solène2, 6, Montheil Lény2, Lallemand Serge2, Marcaillou Boris6, Laurencin Muriel7, Legendre Lucie1, Garrocq Clément2, Boucard Milton1, Beslier Marie-Odile6, Laigle Mireille6, Schenini Laure6, Fabre Pierre-Henri8, Antoine Pierre-Olivier8, Marivaux Laurent8, The Garanti And Antithesis Scientific Parties
Affiliation(s) 1 : Géosciences Montpellier, CNRS-Université des Antilles-Université de Montpellier, F-97159 Pointe à Pitre, Guadeloupe, France
2 : Géosciences Montpellier, CNRS-Université de Montpellier-Université des Antilles, F-34095 Montpellier, France
3 : Office of the Vice-Provost (Research), University College London, 2 Taviton Street, London WC1H 0BT, UK
4 : Université Claude Bernard Lyon 1, ENS de Lyon, CNRS, UMR 5276 LGL-TPE, F-69622 Villeurbanne, France
5 : National Institute of Marine Geology and Geoecology, 23–25 Dimitrie Onciul Street, PO Box 34–51, 70318 Bucharest, Romania
6 : Geoazur, Université de la Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, IRD, F-06560 Valbonne, France
7 : Laboratoire d'Océanologie et Géosciences, Université de Lille, 59655 Villeneuve d'Ascq, France
8 : Institut des Sciences de l'Evolution de Montpellier (ISE-M), Univ Montpellier, CNRS, IRD, EPHE, F-34095 Montpellier, France
Source Earth-science Reviews (0012-8252) (Elsevier BV), 2021-06 , Vol. 217 , P. 103617 (24p.)
DOI 10.1016/j.earscirev.2021.103617
WOS© Times Cited 15
Keyword(s) Lesser Antilles, Cenozoic basins, Biostratigraphy, Seismic stratigraphy, Palaeogeography, Vertical motions

Our study aims to reconstruct the palaeogeography of the northern part of the Lesser Antilles in order to analyse whether emerged areas might have existed during the Cenozoic, favouring terrestrial faunal dispersals between South America and the Greater Antilles along the present-day Lesser Antilles arc. The stratigraphy and depositional environments of the islands of Anguilla, St Martin, Tintamarre, St Barthélemy, Barbuda and Antigua are reviewed in association with multichannel reflection seismic data acquired offshore since the 80's in the Saba, Anguilla and Antigua Banks and in the Kalinago Basin, including the most recent academic and industrial surveys. Seven seismic megasequences and seven regional unconformities are defined, and calibrated from deep wells on the Saba Bank and various dredges performed during marine cruises since the 70's in the vicinity of the islands. Onshore and offshore correlations allow us to depict an updated and detailed sedimentary organisation of the northern part of the Lesser Antilles from the late Eocene to the late Pleistocene. Paleogeographic reconstructions reveal sequences of uplift and emergence across hundredswide areas during the late Eocene, the late Oligocene, the early middle-Miocene and the latest Miocene-earliest Pliocene, interspersed by drowning episodes. The ∼200 km-long and ∼20 km-wide Kalinago Basin opened as an intra-arc basin during the late Eocene - early Oligocene. These periods of emergence may have favoured the existence of episodic mega-islands and transient terrestrial connections between the Greater Antilles, the Lesser Antilles and the northern part of the Aves Ridge (Saba Bank). During the Pleistocene, archipelagos and mega-islands formed repeatedly during glacial maximum episodes.

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Cornée Jean-Jacques, Münch Philippe, Philippon Mélody, Boudagher-Fadel Marcelle, Quillévéré Frédéric, Melinte-Dobrinescu Mihaela, Lebrun Jean-Frédéric, Gay Aurelien, Meyer Solène, Montheil Lény, Lallemand Serge, Marcaillou Boris, Laurencin Muriel, Legendre Lucie, Garrocq Clément, Boucard Milton, Beslier Marie-Odile, Laigle Mireille, Schenini Laure, Fabre Pierre-Henri, Antoine Pierre-Olivier, Marivaux Laurent, The Garanti And Antithesis Scientific Parties (2021). Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles. Earth-science Reviews, 217, 103617 (24p.). Publisher's official version : https://doi.org/10.1016/j.earscirev.2021.103617 , Open Access version : https://archimer.ifremer.fr/doc/00687/79941/