132146 20260217205453.0 doi 10.1127/nos/2023/0751 sideral 137338 ART-2024-137338 eng Viganò, Allyson Calcareous nannofossil biostratigraphy and biochronology across the Eocene-Oligocene transition: the record at IODP Site U1509 (Tasman Sea) and a global overview 2024 Access copy available to the general public Unrestricted The abundance, wide distribution, and high evolutionary rates of calcareous nannofossils provide a powerful and reliable tool for correlating and dating marine sedimentary records, especially during the Cenozoic. Their assemblage turnover has been documented extensively across the Eocene-Oligocene transition (EOT), but without a parallel framework toward detailed biostratigraphy. We present highly resolved semi-quantitative calcareous nannofossil data from a continuous Eocene-Oligocene transition record recovered during International Ocean Discovery Program (IODP) Site U1509 (Expedition 371), presently located at 34.4° S latitude in the New Caledonia Trough (Tasman Sea). We present an improved age model for sedimentation at this site based on integrated bio-magnetostratigraphy. Our high resolution biostratigraphic data provide an independent age calibration for biohorizons, both established and additional, which we compare to previous biochronological estimates from low-middle and high latitudes. This allows for a critical evaluation of the accuracy, reliability, synchroneity or diachroneity of each biohorizon across different oceanographic domains. Finally, we infer that Site U1509 belonged to the subtropical low-middle latitude domain during the late Eocene to early Oligocene, with a paleolatitude of ~45°S. This result has important implications for paleoceanographic reconstructions. info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 2.6 2024 GEOLOGY 7 / 62 = 0.113 2024 Q1 T1 0.932 2024 Stratigraphy 2024 Q1 Geology 2024 Q1 5.3 2024 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Dallanave, Edoardo Alegret, Laia Universidad de Zaragoza (orcid)0000-0002-8801-9544 Westerhold, Thomas Sutherland, Rupert Dickens, Gerald R. Newsam, Cherry Agnini, Claudia 2000 655 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Paleontología 57, 1 (2024), 1-23 Newsl. stratigr. Newsletters on Stratigraphy 0078-0421 12091676 http://zaguan.unizar.es/record/132146/files/texto_completo.pdf Postprint 1896494 http://zaguan.unizar.es/record/132146/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:132146 articulos driver 2026-02-17-20:19:39 ARTICLE