A Long-Term Record of Quaternary Facies Patterns and Palaeonvironmental Trends from the Po Plain (NE Italy) as Revealed by Bio-Sedimentary Data
| Autor: | Alessandro Amorosi, Bruno Campo, Matteo Germano, Giulia Barbieri, Veronica Rossi, Stefano Claudio Vaiani |
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| Přispěvatelé: | Rossi V., Amorosi A., Barbieri G., Vaiani S.C., Germano M., Campo B. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Quaternary changes
cyclic sedimentation QE1-996.5 Ostracod Milankovitch cycles Mediterranean coastal plain Pleistocene Context (language use) Geology Mediterranean coastal plains Paleontology Benthic foraminifer Facies Interglacial ostracods General Earth and Planetary Sciences Sedimentary rock benthic foraminifers Quaternary Holocene |
| Zdroj: | Geosciences, Vol 11, Iss 401, p 401 (2021) Geosciences Volume 11 Issue 10 |
| ISSN: | 2076-3263 |
| Popis: | Understanding Quaternary dynamics of delta-coastal plains across multiple glacial-interglacial cycles in the Milankovitch band (~100 kyrs) is crucial to achieve a robust evaluation of possible environmental response to future climate-change scenarios. In this work, we document the long-term bio-sedimentary record of core 204 S16 (~205 m long), which covers a wide portion of the post-MPR (Mid-Pleistocene Revolution) interval, taking advantage of the highly subsiding context of the SE Po Plain (NE Italy). Detailed facies characterization through an integrated sedimentological and meiofauna (benthic foraminifers and ostracods) approach allowed for the identification of a repetitive pattern of alluvial deposits alternating with four fossiliferous, paralic to shallow-marine units (Units 1–4). The transgressive surfaces identified at the base of these units mark major flooding events, forced by Holocene (Unit 4), Late Pleistocene (Unit 3) and Middle Pleistocene (Units 1, 2) interglacials. Distinct stratigraphic patterns typify the Middle Pleistocene interval, which includes coastal-marine (tidal inlet and bay) deposits. In contrast, lagoonal sediments record the maximum marine influence in the Late Pleistocene-Holocene succession. As a whole, the meiofauna tracks a regressive trend, with the deepest conditions recorded by the oldest Unit 1 (MIS 9/11 age?). |
| Databáze: | OpenAIRE |
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