The scenario of the Messinian Salinity Crisis (MSC) remains one of the most debated topics in the Mediterranean realm and especially in the Sorbas Basin, which is one of the type-localities of MSC-related deposits. After a recently improved chronostratigraphic framework of the Miocene and Pliocene deposits in the basin, it appears important to image the morphology of the Messinian Erosional Surface (MES) at depth. We built a 3D model at the basin-scale of the Miocene and Pliocene series that confirms the erosional character of the Messinian/Pliocene boundary, solving a long-standing and debated question. We tentatively also suggest that the fluvial system developed during the peak of the MSC was exiting the basin toward the south. This new geometrical model, showing a robust internal consistency, can be used as a basis for interpreting the Messinian Salinity Crisis in other sedimentary basins around the Mediterranean Sea. The return of marine conditions in the Early Pliocene on an erosional surface interferes with the continuous formation of the Sorbas Basin syncline, subsidence of the hinge, uplift of the limbs and gravitational sliding. The irregular shape of the MES is superimposed by small-scale folding describing box-type folds oriented along two sub-perpendicular NE-SW and NW-SE fold axes. The architecture of these folds suggests a gravitational sliding of post-evaporitic marine sediments during the progressive deformation of the basin during the Zanclean.