The myth of the Messinian Dardanelles: Late Miocene stratigraphy and palaeogeography of the ancient Aegean-Black Sea gateway

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dc.contributor.authorKrijgsman, W.
dc.contributor.authorStoica, M.
dc.contributor.authorHoyle, T.M.
dc.contributor.authorJorissen, E.L.
dc.contributor.authorLazarev, S.
dc.contributor.authorRausch, L.
dc.contributor.authorWesselingh, F.P.
dc.date.accessioned2020-12-01T11:52:19Z
dc.date.available2020-12-01T11:52:19Z
dc.date.issued2020
dc.departmentEge Üniversitesien_US
dc.description.abstractThe Dardanelles region has formed a key gateway connecting the Eastern Paratethys and the Aegean/Mediterranean since the late Miocene. Its sedimentary sequences contain crucial information about connectivity and tectonics but so far lack unambiguous age constraints. Only a few Miocene marine episodes have been documented and fossil assemblages are predominantly composed of Paratethyan fauna (mollusks and ostracods). Here, we apply an integrated stratigraphic approach and use the recently established chronostratigraphy for the Eastern Paratethys to re-evaluate the faunal assemblages and palaeoenvironments of the Seddülbahir and İntepe sections that allegedly played a crucial role in the geodynamic evolution of the Dardanelles during the Messinian-Zanclean. The Paratethyan ostracods and mollusks, however, clearly indicate that these sections correspond to the middle Tortonian (~9 Ma; Bessarabian–Khersonian in Eastern Paratethys terminology). Nannofossil assemblages are dominated by a mixing of reworked taxa from the late Eocene and Oligocene and no age-diagnostic taxa have been observed. Dinoflagellate analyses are also hampered by reworking and mainly reveal non-marine (fresh to oligohaline) aquatic conditions. Fossil mammal remains in the Seddülbahir section and other localities in the region confirm the late Miocene age. Strontium (87Sr/86Sr) isotope ratios of the anomalohaline (brackish) ostracods are significantly below open ocean values and similar to values obtained from Khersonian ostracods of Bulgaria. Fresh water assemblages reveal much higher 87Sr/86Sr values, which are interpreted to reflect the composition of local rivers. We conclude that in late Miocene times the Dardanelles region was a fresh to anomalohaline embayment, ephemerally connected to the Eastern Paratethys. We found no evidence for a major Messinian erosional surface nor for marine Mediterranean fossils indicative of the early Zanclean. Our results furthermore indicate that the proposed Messinian age for the propagation of the North Anatolian Fault into the Dardanelles region must be revised. © 2020 Elsevier B.V.en_US
dc.description.sponsorshipH2020 Marie Sk?odowska-Curie Actions, MSCA: 642973en_US
dc.description.sponsorshipThis research is part of the PRIDE project (Pontocaspian RIse and DEmise), which was funded by the European Union's Horizon 2020 research and innovation program, under the Marie Sk?odowska-Curie Action (grant agreement ? 642973 ). We thank managing editor Thomas Algeo and two anonymous reviewers for their thorough and constructive comments that significantly improved the manuscript.en_US
dc.identifier.doi10.1016/j.palaeo.2020.110033
dc.identifier.issn0031-0182
dc.identifier.issn0031-0182en_US
dc.identifier.scopus2-s2.0-85092062048en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.palaeo.2020.110033
dc.identifier.urihttps://hdl.handle.net/11454/61499
dc.identifier.volume560en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofPalaeogeography, Palaeoclimatology, Palaeoecologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMioceneen_US
dc.subjectNorth Anatolian Faulten_US
dc.subjectPaleontologyen_US
dc.subjectParatethysen_US
dc.subjectStratigraphyen_US
dc.subjectTurkeyen_US
dc.titleThe myth of the Messinian Dardanelles: Late Miocene stratigraphy and palaeogeography of the ancient Aegean-Black Sea gatewayen_US
dc.typeArticleen_US

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