- 1University of Venice Ca' Foscari, University, Department of Environmental Sciences, Informatics and Statistics, Mestre, Italy (ciro.cerrone@unive.it; alessio.rovere@unive.it)
- 2University of Campinas (UNICAMP), Institute of Geoscience, Department of Geography, Laboratory of Geomorphology, 13083-855, Campinas, Brazil Brazil (lucalammle@ige.unicamp.br; archi@unicamp.br)
- 3University of Bari Aldo Moro, Department of Earth and Geo-Environmental Sciences, Via Orabona, 4, 70125 Bari, Italy (giovanni.scicchitano@uniba.it)
- 4Instituto Oceanográfico, Universidade de São Paulo, Praça Do Oceanográfico, 191, São Paulo, SP, 05508-120, Brazil (jovane@usp.br; gabrieltagliaro@usp.br)
- 5Department of Earth and Planetary Sciences, Harvard University, Cambridge, Ma 02138, USA (jxm@eps.harvard.edu)
- 6Department of Pure and Applied Sciences (DiSPeA), University of Urbino “Carlo Bo”, Urbino, Italy (paolo.stocchi@uniurb.it)
Geological sea-level proxies (e.g., fossil intertidal or foreshore deposits) preserve crucial data that enable the reconstruction of historical sea-level fluctuations. This information is essential for assessing the extension and volume of ice sheets during previous warm periods.
The work aims to present the results of a morpho-stratigraphic field campaign conducted along the southern Brazilian coast, from Osório (Rio Grande do Sul) to Paranaguá (Paraná). A classical geological and geomorphological approach was coupled with a literature review of the geological sea-level proxies related to Marine Isotope Stage (MIS) 5 from the coast of Uruguay to São Paulo. Samples from shallow-water marine sand and aeolian deposits have been analysed using granulometric and micropaleontological methods, in addition to direct dating with the Optically Stimulated Luminescence (OSL) technique. The elevation of each proxy was measured with centimetric precision using a GNSS RTK station and referenced to the local geoid model (MAPGEO2015), with an associated error margin of only a few centimetres.
Preliminary findings indicate that vertical land movements, both associated with glacial isostatic adjustment and sediment isostatic rebound, may have played a key role in the accumulation of Late Pleistocene marine and aeolian deposits, positioning them several meters above sea level at odds with global mean sea level position.
This presentation contributes to the WARMCOASTS project, which received funding from the European Research Council under the European Union's Horizon 2020 research and innovation programme (grant agreement n. 802414).
How to cite: Cerrone, C., Lämmle, L., Perez Filho, A., Scicchitano, G., Jovane, L., Tagliaro, G. T., Mitrovica, J. X., Stocchi, P., and Rovere, A.: Pleistocene morpho-stratigraphy and vertical land motions on the South Brazil-Uruguay coastal plain, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-12417, https://doi.org/10.5194/egusphere-egu25-12417, 2025.
