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  • New chronology for submerge...
    Varzi, Andrea Giulia; Meschis, Marco; Fallati, Luca; Scicchitano, Giovanni; De Santis, Vincenzo; Scardino, Giovanni; Basso, Daniela; Bracchi, Valentina Alice; Savini, Alessandra

    Marine geology, August 2024, 2024-08-00, Volume: 474
    Journal Article

    We investigated the Late Pleistocene-Holocene crustal vertical movements off the coast of Marzamemi village in SE Sicily, Italy. By using a Synchronous Correlation Approach (SCA), we analysed terraced landforms that characterize a submerged sector within one of Southern Italy's most seismically active regions. In this area, the emerging portion of the NE-SW oriented bulge of the African foreland structurally shapes the coastal and marine regions off Marzamemi village. Based on a newly created 17 km2 high-resolution bathymetric map generated from a Multibeam Echosounder (MBES) survey conducted in June 2021, we identified and examined four main paleo-shorelines identifying four submerged terraces. Terraced landforms play a crucial role in reconstructing Quaternary glacial and interglacial stages, offering insights into associated sea level fluctuations. Through the application of the SCA, our goal is to refine the chronology of these recently mapped and submerged marine terraces off the Marzamemi village, thereby contributing to the calculation of associated rates of crustal vertical movements. We demonstrate that these rates persist constantly throughout the Late Pleistocene-Holocene epoch, suggesting overall tectonic stability, with a slight and likely local fault-related subsidence. We explore a few chronology scenarios, raising questions about whether these submerged marine terraces are indeed recording the Late Pleistocene-Holocene limit or not. This research contributes to a better understanding of the geological dynamics in this region and sheds light on the potential factors influencing coastal landscape development over time. •Geomorphological evolution of submerged paleoshorelines mapped in the Marzamemi offshore (SE Sicily) by GIS analysis is reconstructed•New ages estimation for undated submerged paleoshorelines are provided•New rates of crustal vertical movements in the Marzamemi offshore (SE Sicily) are estimated•Future works on the faulting activity affecting SE Sicily over the last 80 ka is stressed