Wilkes Land Late Pleistocene diatom age model: From bio-events to quantitative biostratigraphy
| Autor: | Maria Cristina Bonci, Federica Donda, María Angeles Bárcena, Raffaella Tolotti, Nicola Corradi, Andrea Caburlotto, Patrizia Macrì, Xavier Crosta, Laura De Santis |
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| Přispěvatelé: | Dipartimento Scienze della Terra, Universita degli studi di Genova, Universidad de Salamanca, Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV), Istituto Nazionale di Geofisica e Vulcanologia, Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Mid Pleistocene Transition
Paleomagnetism 010504 meteorology & atmospheric sciences Pleistocene Paleomagnetic dataset Context (language use) Biostratigraphy Hiatus 010502 geochemistry & geophysics 01 natural sciences Paleontology Late Pleistocene [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Holocene 0105 earth and related environmental sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere biology Diatom Biomarkers Quantitative Biostratigraphy Sediment biology.organism_classification Matuyama-Brunhes Transition Diatom [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Geology |
| Zdroj: | Revue de Micropaléontologie Revue de Micropaléontologie, Elsevier Masson, 2018, 61 (2), pp.81-96. ⟨10.1016/j.revmic.2018.05.001⟩ |
| ISSN: | 0035-1598 |
| DOI: | 10.1016/j.revmic.2018.05.001 |
| Popis: | International audience; A new method merges conventional and quantitative biostratigraphic approaches, supported by magnetic polarity data, to develop a chronological framework for sediment core MD03-2595 retrieved on the continental rise off Wilkes Land, East Antarctica before proceeding to paleoceanographic and paleoclimatic analysis. This combined method helped to identify climatic cycles, highlight stratigraphic discontinuities and reworking, and assess regional sedimentological and diatom biostratigraphic evolution. Core MD03-2595 spans the last 0.8 Ma, from the Mid Pleistocene Transition (MPT) to the Early Holocene. A hiatus including Marine Isotope Stages (MIS) 19, 18 and 17 was identified, and a decreasing trend in sediment accumulation rates from MIS 16 to the Holocene was observed. This quantitative diatom biostratigraphic dataset, placed in its own sedimentological and paleomagnetic context, provides new information regarding the paleobiogeographic distribution and ecological responses of biostratigraphically significant diatom species, such as Thalassiosira elliptipora and T. fasciculata, for the Matuyama-Brunhes (M-B) transition, and Actinocyclus ingens, Hemidiscus karstenii and Rouxia spp. for the middle and late Pleistocene diatom biozonation. |
| Databáze: | OpenAIRE |
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