ABSTRACT\ud
In the coastal sector of NW Sicily, the regional correlation of relevant unconformities recognised\ud
within the Quaternary sedimentary successions allowed the mapping of seven unconformitybounded\ud
stratigraphic units (UBSUs). The regional unconformities are marine or subaerial\ud
erosional surfaces, as well as non-depositional surfaces, locally marked by paleosoils. The\ud
erosional surfaces were produced from marine abrasion, surface water overland/\ud
concentrated flow, river erosion, karst solution, mass movement, or wind erosion. The main\ud
lithofacies of the Quaternary UBSUs consist of: (a) marine and coastal bioclastic calcarenites,\ud
(b) aeolian sandstones, (c) river deposits, (d) colluvial deposits, (e) talus slope deposits, (f)\ud
landslide deposits, and (g) chemical carbonates (travertines and speleothems). Quaternary\ud
environmental changes, due to tectonics, climate, and sea-level oscillations, are the causes\ud
that favoured the development of erosion/deposition processes responsible for the genesis\ud
of unconformities and deposits. As a result, through the UBSU map of the NW Sicilian coastal\ud
belt, it is possible to: (i) recognise stratigraphic units controlled by tectonic, climatic, and\ud
environmental processes (and their interplay) and (ii) detect Quaternary sedimentary evolution