Eocene intra-plate shortening responsible for the rise of a faunal pathway in the northeastern Caribbean realm

Type Article
Date 2020-10
Language English
Author(s) Philippon Mélody1, Cornée Jean-Jacques2, Münch Philippe2, Van Hinsbergen Douwe J. J.3, Boudagher-Fadel Marcelle4, Gailler Lydie5, Boschman Lydian M.6, Quillevere Fredéric7, Montheil Leny2, Gay Aurelien2, Lebrun Jean Fredéric1, 2, Lallemand Serge2, Marivaux Laurent9, Antoine Pierre-Olivier9, With The Garanti Team
Affiliation(s) 1 : Geosciences Montpellier, Universite´ de Montpellier, CNRS, Universite´ des Antilles, Pointe-à-Pitre, Franc
2 : Geosciences Montpellier, Universite´ de Montpellier, CNRS, Universite´ des Antilles, Montpellier, France
3 : Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands
4 : Office of the Vice-Provost (Research), University College London, London, United Kingdom
5 : Institut de Recherche pour le Developpement, Universite´ Jean Monnet, Clermont-Ferrand, France
6 : Department of Environmental Systems Science, ETH Zu¨ rich, Zu¨ rich, Switzerland
7 : Univ. Lyon, Universite´ Claude Bernard Lyon 1, ENS de Lyon, UMR 5276 LGL-TPE, Villeurbanne, France
8 : Institut des Sciences de l evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Laboratoire de Pale´ontologie, Montpellier, France
9 : Institut des Sciences de l evolution de Montpellier (ISEM, UMR 5554, CNRS/UM/IRD/EPHE), Laboratoire de Pale´ontologie, Montpellier, France
Source Plos One (1932-6203) (Public Library of Science (PLoS)), 2020-10 , Vol. 15 , N. 10 , P. e0241000 (13p.)
DOI 10.1371/journal.pone.0241000
WOS© Times Cited 4
Abstract

Intriguing latest Eocene land-faunal dispersals between South America and the Greater Antilles (northern Caribbean) has inspired the hypothesis of the GAARlandia (Greater Antilles Aves Ridge) land bridge. This landbridge, however, should have crossed the Caribbean oceanic plate, and the geological evolution of its rise and demise, or its geodynamic forcing, remain unknown. Here we present the results of a land-sea survey from the northeast Caribbean plate, combined with chronostratigraphic data, revealing a regional episode of mid to late Eocene, trench-normal, E-W shortening and crustal thickening by ∼25%. This shortening led to a regional late Eocene–early Oligocene hiatus in the sedimentary record revealing the location of an emerged land (the Greater Antilles-Northern Lesser Antilles, or GrANoLA, landmass), consistent with the GAARlandia hypothesis. Subsequent submergence is explained by combined trench-parallel extension and thermal relaxation following a shift of arc magmatism, expressed by a regional early Miocene transgression. We tentatively link the NE Caribbean intra-plate shortening to a well-known absolute and relative North American and Caribbean plate motion change, which may provide focus for the search of the remaining connection between ‘GrANoLA’ land and South America, through the Aves Ridge or Lesser Antilles island arc. Our study highlights the how regional geodynamic evolution may have driven paleogeographic change that is still reflected in current biology.

Full Text
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Publisher's official version 13 2 MB Open access
S1 Fig. Photomicrograph of the stratigraphical significant foraminifera found in Pointe Toiny limestones. 1 MB Open access
S1 File. Geochronology: 40Ar/39Ar dating 2 MB Open access
S2 File. Marine geophysics: GARANTI cruise data acquisition and processing. 2 MB Open access
S3 File. Gravity data modeling method. 891 KB Open access
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Philippon Mélody, Cornée Jean-Jacques, Münch Philippe, Van Hinsbergen Douwe J. J., Boudagher-Fadel Marcelle, Gailler Lydie, Boschman Lydian M., Quillevere Fredéric, Montheil Leny, Gay Aurelien, Lebrun Jean Fredéric, Lallemand Serge, Marivaux Laurent, Antoine Pierre-Olivier, With The Garanti Team (2020). Eocene intra-plate shortening responsible for the rise of a faunal pathway in the northeastern Caribbean realm. Plos One, 15(10), e0241000 (13p.). Publisher's official version : https://doi.org/10.1371/journal.pone.0241000 , Open Access version : https://archimer.ifremer.fr/doc/00656/76789/