MULTICHANNEL SEISMIC IMAGE OF THE CRUSTAL THINNING AT THE NE IBERIAN MARGIN COMBINING NORMAL AND WIDE-ANGLE REFLECTION DATA

The seismic image of the Moho at the transition from the NE Iberian Pe ninsula to the Western Mediterranean Sea is investigated using coincid ent steep and wide-angle reflection data merged into a single stacked and migrated section. The multichannel analysis of onshore/offshore la rge-aperture data provides new insight on the deep structure in areas where the steep sections lack penetration, and reveals that the crust undergoes a strong but continuous thinning along the flanks of the Val encia trough. The combined seismic image indicates that almost half of the continental crust (14-15 km) is lost in less than 60 km horizonta l distance.