Philippon, M;
Cornée, J-J;
Münch, P;
van Hinsbergen, DJJ;
BouDagher-Fadel, M;
Gailler, L;
Boschman, LM;
... GARANTI Team; + view all
(2020)
Eocene intra-plate shortening responsible for the rise of a faunal pathway in the northeastern Caribbean realm.
PLOS ONE
, 15
(10)
, Article e0241000. 10.1371/journal.pone.0241000.
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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.
| Type: | Article |
|---|---|
| Title: | Eocene intra-plate shortening responsible for the rise of a faunal pathway in the northeastern Caribbean realm |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1371/journal.pone.0241000 |
| Publisher version: | https://doi.org/10.1371/journal.pone.0241000 |
| Language: | English |
| Additional information: | Copyright © 2020 Philippon et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | Caribbean, Eocene epoch, Islands, Deformation, Volcanoes, Thrust, Oligocene epoch, South America |
| UCL classification: | UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10114661 |
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