Stratigraphic calibration of the seismic data by OR-1 (location Figs. 4 and 11). Note the intense faulting with flower structures affecting the whole post- Oligocene section including the Upper Pliocene basalts, the Messinian Erosional Surface (MES) and the strong reflectors at the Base Aquitanian-Top Oligocene marine sediments. The pre-MES inversion and presence of pre-MES faults show that the tectonic event started in the Late Miocene and continued until Recent time.