Extension of the Messinian Salinity Crisis (MSC) markers and the Margin Erosion Surface (MES) in Western Mediterranean Sea. A. Regional bathymetric map (from Brossolo and Mascle, 2008) with the location of the two study areas (black rectangles). Margin Erosion Surface (MES) downslope limit, in pink dotted line, is also the upper limit of the MSC units extension. B. Zooms on the two study areas: maps of Ibiza (left) and East Sardinia (right). Isobaths draw the base of the Pliocene-Quaternary unit in its present-day morphology. UU = Upper Unit; MU = Mobile unit; BU = Bedded unit; PLG = Primary Lower Gypsum unit.