The present study describes the coastal land and seafloor morphology of the Sinis Peninsula (West Sardinia, Italy). Based on the analysis of the wave motion hydrodynamic, the 7500 yr B.P. shoreline is outlined. The potential causes of the transportation of deposits, which have been reworked from aplitic dykes from the Mal di Ventre Islet to the central-southern coast of the peninsula, are investigated on the basis of 7500 yr B.P. seafloor wave motion transformations and relative field of velocity analysis.