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de Sabata, Eleonora
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- PublicationRestrictedReply to comment by Evelpidu N., and Pirazzoli P. on “Tidal notches in the Mediterranean sea: A comprehensive analysis”(2016)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;; ; ; ; ; ; ; ; ; ; ; ;We take the chance offered by the comment of Evelpidou and Pirazzoli (2015a) to our paper (Antonioli et al., 2015) to clarify some aspects of our work. We reinforce our statement that a present-day tidal notch is almost continuously developed along much of the central Mediterranean coast.129 3 - PublicationRestrictedTidal notches in Mediterranean Sea: a comprehensive analysis(2015)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Antonioli, F.; ENEA ;Lo Presti, V.; ENEA ;Rovere, A.; MARUM, University of Bremen & ZMT, Tropical Marine Ecology Center, Bremen, Germany ;Ferranti, L.; Department of Earth Sciences, Environment and Resources, “Federico II” University, Napoli, Italy ;Anzidei, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;Furlani, S.; Department of Mathematics and Geosciences, University of Trieste, Italy ;Mastronuzzi, G.; Department of Earth and Geoenvironmental Sciences, “Aldo Moro” University, Bari, Italy ;Orrù, P.; Department of Chemical and Geological Sciences, University of Cagliari, Italy ;Scicchitano, G.; Department of Phisics and Earth Sciences, University of Messina, Italy ;Sannino, G.; ENEA ;Spampinato, C.; Department of Biological, Geological and Environmental Sciences, University of Catania, Italy ;Pagliarulo, R.; CNR, IRPI, Bari, Italy ;Deiana, G.; Department of Chemical and Geological Sciences, University of Cagliari, Italy ;De Sabata, E.; MedSharks, Roma, Italy ;Sansò, P.; Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy ;Vacchi, M.; Aix-Marseille Universit e, CEREGE CNRS-IRD UMR 34, Europole de l'Arbois Aix-en-Provence, France ;Vecchio, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia ;; ; ; ; ; ; ; ;; ; ; ; ; ; ; Recent works (Evelpidou et al., 2012) suggest that the modern tidal notch is disappearing worldwide due sea level rise over the last century. In order to assess this hypothesis, we measured modern tidal notches in several of sites along the Mediterranean coasts. We report observations on tidal notches cut along carbonate coasts from 73 sites from Italy, France, Croatia, Montenegro, Greece, Malta and Spain, plus additional observations carried outside the Mediterranean. At each site, we measured notch width and depth, and we described the characteristics of the biological rim at the base of the notch. We correlated these parameters with wave energy, tide gauge datasets and rock lithology. Our results suggest that, considering ‘the development of tidal notches the consequence of midlittoral bioerosion’ (as done in Evelpidou et al., 2012) is a simplification that can lead to misleading results, such as stating that notches are disappearing. Important roles in notch formation can be also played by wave action, rate of karst dissolution, salt weathering and wetting and drying cycles. Of course notch formation can be augmented and favoured also by bioerosion which can, in particular cases, be the main process of notch formation and development. Our dataset shows that notches are carved by an ensemble rather than by a single process, both today and in the past, and that it is difficult, if not impossible, to disentangle them and establish which one is prevailing. We therefore show that tidal notches are still forming, challenging the hypothesis that sea level rise has drowned them.339 84 - PublicationOpen AccessPreservation of Modern and MIS 5.5 Erosional Landforms and Biological Structures as Sea Level Markers: A Matter of Luck?(2021)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;The Mediterranean Basin is characterized by a significant variability in tectonic behaviour, ranging from subsidence to uplifting. However, those coastal areas considered to be tectonically stable show coastal landforms at elevations consistent with eustatic and isostatic sea level change models. In particular, geomorphological indicators—such as tidal notches or shore platforms—are often used to define the tectonic stability of the Mediterranean coasts. We present the results of swim surveys in nine rocky coastal sectors in the central Mediterranean Sea using the Geoswim approach. The entire route was covered in 22 days for a total distance of 158.5 km. All surveyed sites are considered to have been tectonically stable since the last interglacial (Marine Isotope Stage 5.5 [MIS 5.5]), because related sea level markers fit well with sea level rise models. The analysis of visual observations and punctual measurements highlighted that, with respect to the total length of surveyed coast, the occurrence of tidal notches, shore platforms, and other indicators accounts for 85% of the modern coastline, and only 1% of the MIS 5.5 equivalent. Therefore, only 1% of the surveyed coast showed the presence of fossil markers of paleo sea levels above the datum. This significant difference is mainly attributable to erosion processes that did not allow the preservation of the geomorphic evidence of past sea level stands. In the end, our research method showed that the feasibility of applying such markers to define long-term tectonic behaviour is much higher in areas where pre-modern indicators have not been erased, such as at sites with hard bedrock previously covered by post-MIS 5.5 continental deposits, e.g., Sardinia, the Egadi Islands, Ansedonia, Gaeta, and Circeo. In general, the chances of finding such preserved indicators are very low.68 13