Transfer zones and timing of extension in Mediterranean back-arc basins. A: location of transfer zones discussed in the text (thick grey lines or domains). Nature of oceanic floor: exhumed mantle domains after Prada et al. (2014, 2016, 2018) and Dannowski et al. (2019a, 2019b). B: Timing of rifting and emplacement of oceanic crust. 1: West Anatolia Transfer Zone, 2: Central Aegean Shear Zone, 2b: Kephalonia transfer fault; 3: western limit of the Calabria accretionary wedge, 4: transfer zone along the northern limit of the Southern Tyrrhenian oceanic/exhumed mantle domain, 5: 41st parallel fault, 6: Alps/Apennines transition, 7: Catalan-Baleares)Sicily Transfer Zone (CBSTZ), 8: Central transfer zone (Valencia basin), 9: transition between the Liguro-Provençal and Algerian basins, 10: Betic Cordillera, northern limit of the Alboran Sea, 11: Rif, southern limit of the Alboran Sea, 12: Trimiti transfer zone.