Geomorphological signature of late Pleistocene sea level oscillations in Torre Guaceto marine protected area (Adriatic Sea, SE Italy)

Abstract

Morphostratigraphy is a useful tool to reconstruct the sequence of processes responsible for shaping the landscape. In marine and coastal areas, where landforms are only seldom directly recognizable given the diFFIculty to have eyewitness of sea-floor features, it is possible to correlate geomorphological data derived from indirect surveys (marine geophysics and remote sensing) with data obtained from direct ones performed on-land or by scuba divers. In this paper, remote sensing techniques and spectral images allowed high-resolution reconstruction of both morpho-topography and morpho-bathymetry of the Torre Guaceto Marine Protected Area (Italy). These data were used to infer the sequence of climatic phases and processes responsible for coastal and marine landscape shaping. Our data show a number of relict submerged surfaces corresponding to distinct phases of erosional/depositional processes triggered by the late-Quaternary interglacial-glacial cycles. In particular, we observed the presence of submerged marine terraces, likely formed during MIS 5-MIS 3 relative highstand phases. These geomorphic features, found at depths of ~26-30, ~34-38, and ~45-56 m, represent important evidence of past sea-level variations.