Photographs of the Messinian Erosional Surface taken in four different outcrops located on both sides of the Alboran Sea. A, Guadario (Algesiras, Spain); B, El Túnel (Malaga, Spain); C, Tassafete (Oued Laou, Morocco); Tamrabaht (Boudinar, Morocco). In all outcrops, the Messinian Erosional Surface is underlined by white arrows. Photographs A–C) by J.-P. Suc, photograph D by D. Do Couto.