The paleolandscape evolution of the southwestern coast of Sardinia (Italy) and its impact on Mesolithic settlements

Rita Teresa Melis, Valentino Demurtas, Margherita Mussi, Paolo Emanuele Orrù, Andrea Sulis, Flavio Altamura, Rosanna Erbì, Michele Orrù and Giacomo Deiana

Journal of Maps, 2023, vol. 19, issue 1, 2182722

Abstract: We present a geomorphological map of the southwestern coast of Sardinia encompassing inland and offshore areas of the S’Omu e S’Orku Mesolithic site. The submerged area was documented by high-resolution multibeam bathymetry combined with Side-Scan Sonar data. The emerged coastal area was surveyed using Uncrewed Aerial Vehicle Remote Sensing and field surveys. The inland landforms were shaped by coastal, fluvial, and gravity-induced processes. Most of the submerged landforms appear be modeled in subaerial conditions during sea-level lowstands, and then sealed by the rising sea level. The coastal evolution has been characterized by the rapid cliff retreat facilitated intense linear erosion of watercourses, by debris flows, rockfalls and toppling. Geomorphological evidences of cliff retreat due to landslide was supported by a simplified analytic hydraulic model of the wave-cliff interaction. These processes and the sea level rise canceled any possible Mesolithic settlement along the coast. The survival of the S’Omu e S’Orku site is only due to a protected morphological position and to the distance from the Early Holocene coastline. The dearth of coastal Early Holocene prehistoric sites is likely the outcome of the presented coastal dynamics.

Date: 2023
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DOI: 10.1080/17445647.2023.2182722

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