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dc.rights.licenseopenen_US
dc.contributor.authorKAMOUN, Mohamed
dc.contributor.authorZAIBI, Chahira
dc.contributor.authorLANGER, Martin R.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCARBONEL, Pierre
dc.contributor.authorBEN YOUSSEF, Mohamed
dc.date.accessioned2023-12-04T13:21:19Z
dc.date.available2023-12-04T13:21:19Z
dc.date.issued2021-09-16
dc.identifier.issn18667511en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/186341
dc.description.abstractEnThis study explores the paleoenvironmental changes of the Acholla coast over the last 2000 years by means of subsurface sediment analyses of lagoonal deposits via a multiproxy approach. A sequence of 5 steps is shown to have shaped the coastal development at Acholla and includes (i) the settlement of an open marine embayment during the Upper Pleistocene (substage 5e) in response to a transgressive event as evidenced by the deposition of carbonate sandstones rich in mollusc associations and marine elemental ratios Sr/Al, Ca/Al, Cl/Al, and S/Al; (ii) a sea-level rise towards183 AD, after a long period of emergence of the coast, leading to transgressive deposits of poorly sorted fine sands that are rich in diversified mollusc and ostracod taxa; (iii) a high-energy event (towards 417AD) with a peculiar biofacies characterized by coarse bioclastic mollusc-rich sands, charcoal particles, Tyrrhenian lithoclasts, and high values of marine elemental ratios Cl/Al, S/Al, and Ca/Al; (iv) a progradation of coastal habitats (between 417 and 1577 AD), favored by a period of flooding/detrital input and longshore current drifts, resulting in the development of an extensive sandspit and the formation of the Acholla lagoon. The construction of a Roman pier, originally constructed to protect the Acholla harbor from sedimentation, was counterproductive and favored the expansion of coastal swash bars and extension of the sandspit, ultimately resulting in the abandonment of the Acholla harbor; (v) the closure of the lagoon (from 1577 AD onward) and the built-up of well-sorted silt deposits are marked by the decrease of detrital elemental ratios (Ti/Al, Si/Al, and K/Al) and by reduced ostracod species richness values. The inferred scenario for the evolution at Acholla coast matches those for Sfax and Skhira coast in the Gulf of Gabes (Tunisia). Unlike Sfax and Skhira, however, the Acholla coast has been subjected to uplift by active faults, resulting in a time shift of depositional patterns. © 2021, Saudi Society for Geosciences.
dc.language.isoENen_US
dc.subject.enOstracods
dc.subject.enSea level
dc.subject.enAcholla lagoon
dc.subject.enRoman harbor
dc.subject.enHolocene
dc.subject.enSandspit
dc.subject.enPaleogeography
dc.subject.enTunisia
dc.title.enCoastal dynamics and the evolution of the Acholla lagoon (Gulf of Gabes, Tunisia): a multiproxy approach
dc.typeArticle de revueen_US
dc.identifier.doi10.1007/s12517-021-07590-6en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalArabian Journal of Geosciencesen_US
bordeaux.volume14en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue19en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-04321146
hal.version1
hal.date.transferred2023-12-04T13:21:22Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
dc.rights.ccPas de Licence CCen_US
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