Results of the Campidano-1 well and calibration of a NW-SE seismic profile (See location on Figs. 5 and 14). 1- Base Pliocene (Continental Samassi Fm) 2- Serravallian-Tortonian 3- Burdigalian (Near Base Post-Rift sediments) 4- Upper Aquitanian shallow water limestones 5- Volcanics and Continental conglomerates (Ussana Fm). The well is located on a volcanic high on a magnetic anomaly. In this area, transgression of the see is dated Upper Aquitanian instead of L. Chattian-E. Aquitanian. Marine Messinian and marine Early Pliocene were not preserved contrary to the Northern Campidano (see OR-1 well, Fig. 8).