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Open AccessArticle

Submarine Geomorphology of the Southwestern Sardinian Continental Shelf (Mediterranean Sea): Insights into the Last Glacial Maximum Sea-Level Changes and Related Environments

1
Department of Chemical and Geological Sciences, University of Cagliari, 09042 Monserrato, Italy
2
Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
3
CoNISMa Interuniversity Consortium on Marine Sciences, 00126 Roma, Italy
*
Author to whom correspondence should be addressed.
Water 2021, 13(2), 155; https://doi.org/10.3390/w13020155
Received: 27 November 2020 / Revised: 22 December 2020 / Accepted: 4 January 2021 / Published: 11 January 2021
(This article belongs to the Special Issue Landscapes and Landforms of Terrestrial and Marine Areas)
During the lowstand sea-level phase of the Last Glacial Maximum (LGM), a large part of the current Mediterranean continental shelf emerged. Erosional and depositional processes shaped the coastal strips, while inland areas were affected by aeolian and fluvial processes. Evidence of both the lowstand phase and the subsequent phases of eustatic sea level rise can be observed on the continental shelf of Sardinia (Italy), including submerged palaeo-shorelines and landforms, and indicators of relict coastal palaeo-environments. This paper shows the results of a high-resolution survey on the continental shelf off San Pietro Island (southwestern Sardinia). Multisensor and multiscale data—obtained by means of seismic sparker, sub-bottom profiler chirp, multibeam, side scan sonar, diving, and uncrewed aerial vehicles—made it possible to reconstruct the morphological features shaped during the LGM at depths between 125 and 135 m. In particular, tectonic controlled palaeo-cliffs affected by landslides, the mouth of a deep palaeo-valley fossilized by marine sediments and a palaeo-lagoon containing a peri-littoral thanatocenosis (18,983 ± 268 cal BP) were detected. The Younger Dryas palaeo-shorelines were reconstructed, highlighted by a very well preserved beachrock. The coastal paleo-landscape with lagoon-barrier systems and retro-littoral dunes frequented by the Mesolithic populations was reconstructed. View Full-Text
Keywords: submarine geomorphology; morphostratigraphy; sea-level changes; Last Glacial Maximum; Sardinia; Italy submarine geomorphology; morphostratigraphy; sea-level changes; Last Glacial Maximum; Sardinia; Italy
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MDPI and ACS Style

Deiana, G.; Lecca, L.; Melis, R.T.; Soldati, M.; Demurtas, V.; Orrù, P.E. Submarine Geomorphology of the Southwestern Sardinian Continental Shelf (Mediterranean Sea): Insights into the Last Glacial Maximum Sea-Level Changes and Related Environments. Water 2021, 13, 155. https://doi.org/10.3390/w13020155

AMA Style

Deiana G, Lecca L, Melis RT, Soldati M, Demurtas V, Orrù PE. Submarine Geomorphology of the Southwestern Sardinian Continental Shelf (Mediterranean Sea): Insights into the Last Glacial Maximum Sea-Level Changes and Related Environments. Water. 2021; 13(2):155. https://doi.org/10.3390/w13020155

Chicago/Turabian Style

Deiana, Giacomo; Lecca, Luciano; Melis, Rita T.; Soldati, Mauro; Demurtas, Valentino; Orrù, Paolo E. 2021. "Submarine Geomorphology of the Southwestern Sardinian Continental Shelf (Mediterranean Sea): Insights into the Last Glacial Maximum Sea-Level Changes and Related Environments" Water 13, no. 2: 155. https://doi.org/10.3390/w13020155

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