Fig. 1

a Sketch map showing the location of the studied coastline highlighted in the red circle; b Geologic map of the study area (modified from Amodio-Morelli et al. 1976; Critelli and Le Pera 2003): 1 – Pre-Carboniferous biotitic paragneiss; 2 – Carboniferous granodiorites; 3 – Carboniferous garnet–sillimanite gneiss and pyroxene-bearing amphibolites; 4 – Carboniferous phyllites and amphibolites; 5 – Pre-Triassic biotite–muscovite gneiss, micaschists, amphibolites and metagreywackes; 6 – Triassic–Upper Cretaceous limestones and dolostones; 7 – Upper Triassic–Miocene metalimestones; 8 – Jurassic–Lower Cretaceous blue schist and serpentinites; 9 – Cretaceous slates, metaquartzarenites and metalimestones; 10 – Cretaceous–Paleogene tonalitic gneiss; 11 – Cretaceous–Paleogene garnet–sillimanite gneiss; 12 – Upper Miocene–Lower Pliocene clays, sandstones and conglomerates; 13 – Middle Pliocene–Lower Pleistocene calcarenites, sand, clay and conglomerates; 14 – Holocene sediments; 15 – Littoral drift. M. = Mountain; R. = River