Palaeoecological evidences from foraminifers and ostracods on Late Quaternary sea-level changes in the Ombrone river plain (central Tyrrhenian coast,Italy) |
| |
| Institution: | 1. Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium;2. Institut für Geophysik und Geologie, Universität Leipzig, Leipzig, Germany;3. Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover, Germany;1. Department of Geology, American University of Beirut, 11-0236 Beirut, Lebanon;2. Department of Earth and Environmental Sciences, Yarmouk University, 21163 Irbid, Jordan;3. Department of Animal Ecology and Systematics, Justus Liebig University, 35392 Giessen, Germany;4. Naturalis Biodiversity Centre, P.O. Box 9517, 2300 RA Leiden, the Netherlands;5. Environmental Change Research Centre, Department of Geography, University College London, London WC1E 6BT, United Kingdom;1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, 100875 Beijing, China;2. Key Laboratory of Plateau Geographical Process and Environmental Change of Yunnan Province, School of Tourism and Geographical Sciences, Yunnan Normal University, Kunming 650500, China;1. Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel;2. Department of Maritime Civilizations, Leon H. Charney School of Marine Sciences and the Leon Recanati Institute for Maritime Studies (RIMS), University of Haifa, 199 Aba Khoushy Ave. Mount Carmel, Haifa 3498838, Israel;3. Geological Survey of Israel, 30 Malkhe Yisrael, Jerusalem 95501, Israel |
| |
| Abstract: | The multidisciplinary study of borehole Ombrone S1, sampled in the Grosseto plain, near the Ombrone river mouth, provides new data about sea-level changes during the Holocene in central Tyrrhenian Sea. The palaeontological analysis of the borehole highlights data concerning the foraminifers and ostracods useful to the palaeoenvironmental interpretation. Moreover, geochemical analyses (δ13C and δ18O) were performed on Ammonia parkinsoniana tests and Cyprideis torosa valves. Integrating the results of the palaeontological, lithological and geochemical data, it is possible to single out the environments related to the transgressive trend. Borehole Ombrone S1 is characterised by basal deposits of continental settings, which includes some brackish water marsh, may be related to a slight sea-level oscillation, followed by fluvial gravel ones testifying the deltaic progradation of the Palaeo-Ombrone river. Above, two distinct trangressive events, which were divided by a phase of still-stand, took place. The first one, above the gravel, was responsible for the establishment of the brackish water conditions due to the presence of a barrier-lagoon system, which was finally filled up by terrigenous input. The second one produced, at first, lagoon settings near the sea and, successively, deltaic-related settings for the submersion of the barrier. The littoral sandy bar at 10 m of core-depth represents the first sure evidence of the alluvial plain progradation, which develops up to the core-top. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
