Abstract
The Western Mediterranean Sea is explained as a marginal basin, generated by a N-NW subduction of the African—Apulian plates beneath the European plate. Following an Oligocene rifting phase, oceanic accretion occurred between −21 and −18 m.y., along three main spreading axis trending NE-SW in the Liguro—Provençal Basin, NW-SE in the southern Sardo—Balearic Basin and E-W in the North Algerian Basin. Such kinematics and chronology are consistent with: (a) paleomagnetic data supporting the Sardinian rotation; (b) basin and margin structure; (c) subsidence since 21 m.y., especially during Messinian time; and (d) heat-flow measurements.
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