Seafloor characterisation of the offshore sector around Scoglio d’Affrica islet (Tuscan Archipelago, northern Tyrrhenian sea)

Daniele Spatola, Daniele Casalbore, Martina Pierdomenico, Alessia Conti, Sabina Bigi, Michela Ingrassia, Roberta Ivaldi, Maurizio Demarte, Simone Napoli and Francesco Latino Chiocci

Journal of Maps, 2023, vol. 19, issue 1, 2120836

Abstract: We present a very high-resolution bathy-morphological map of the offshore sector around the Scoglio d’Affrica islet (northern Tyrrhenian Sea, Italy). The study area covers a sector of 45 km2, between 3 and 85 m depth. Its central part, i.e. the apex of the Ridge, is characterised by a flat or gently sloping seafloor, where three mud volcanoes, and 250 pockmarks are recognised. Differently, the western and eastern Ridge flanks are steeper and characterised by 60 quasi-rectilinear escarpments and small ridges, more than 20 morphological highs, and elongated channels occasionally floored by bedforms. The seafloor shallower than 40 m is covered by Posidonia oceanica, forming compact and continuous or fragmented meadows intermingled with sandy patches. The main map represents the bathy-morphological setting of the area, which is largely affected by fluid seepage, providing insights for habitat mapping and preliminary marine geohazard assessment due to the violent gas outburst from mud volcanoes.

Date: 2023
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DOI: 10.1080/17445647.2022.2120836

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