The Bajo Segura Basin (SE Spain): implications for the Messinian salinity crisis in the Mediterranean margins

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dc.contributorCambios Paleoambientalesen
dc.contributorEvolución Geodinámica de la Cordillera Bética Oriental y de la Plataforma Marina de Alicanteen
dc.contributor.authorSoria Mingorance, Jesús Miguel-
dc.contributor.authorCaracuel Martín, Jesús Esteban-
dc.contributor.authorCorbí, Hugo-
dc.contributor.authorDinarès Turell, Jaume-
dc.contributor.authorLancis Sáez, Carlos-
dc.contributor.authorTent-Manclus, Jose Enrique-
dc.contributor.authorYébenes Simón, Alfonso-
dc.contributor.otherUniversidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambienteen
dc.contributor.otherIstituto Nazionale di Geofisica e Vulcanologiaen
dc.identifier.citationSORIA MINGORANCE, Jesús Miguel, et al. "The Bajo Segura Basin (SE Spain): implications for the Messinian salinity crisis in the Mediterranean margins". Stratigraphy. Vol. 5, No. 3-4 (2008). ISSN 1547-139X, pp. 257-263en
dc.description.abstractThe analysis of the Messinian and Pliocene stratigraphy of the Bajo Segura Basin (a marginal basin of the western Mediterranean) has revealed three synthems deposited in a high sea-level context: T-MI (late Tortonian-Messinian), MII (Messinian), and P (early Pliocene), bounded by two lowstand erosional surfaces (intra-Messinian and end-Messinian unconformities). With respect to the salinity crisis, we propose the following series of events: 1) pre-evaporitic or pre-crisis phase (T-MI synthem); 2) first sea-level fall and subaerial exposure (intra-Messinian unconformity), possibly related to the precipitation of the Lower Evaporites; 3) syn-evaporitic phase (MII synthem), recorded both by selenitic gypsum (Upper Evaporites) as well as by lagoon deposits (Lago-Mare); 4) second sea-level fall and subaerial exposure (end-Messinian unconformity), characterized by deeply incised palaeovalleys; and 5) postevaporitic or post-crisis phase (P synthem), which coincides with the definitive restoration of open marine conditions in the basin. A combined biostratigraphic and magnetostratigraphic study revealed that all the events linked to the salinity crisis (from the end of the pre-evaporitic phase to the beginning of the post-evaporitic phase) occurred within the chron C3r (c. 5.9-5.2 Ma).en
dc.description.sponsorshipFinancial aid was provided by Research Projects BTE2003-05047, CGL2005-06224BTE (MEC), CGL2007-65832/BTE (MEC), GV04B-629 (Generalitat Valenciana) and “Paleoenvironmental Changes” Group (UA).en
dc.publisherMicropaleontology Pressen
dc.subjectBajo Segura Basinen
dc.subjectMessinian salinity crisisen
dc.titleThe Bajo Segura Basin (SE Spain): implications for the Messinian salinity crisis in the Mediterranean marginsen
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