Tectono-sedimentary evolution of the peripheral basins of the Alboran Sea in the arc of Gibraltar during the latest Messinian-Pliocene

Moreover, the unit boundaries do not coincide with those of the familiar Exxon coastal aggradational curve, but rather with the local or regional tectonic activity. Consequently, the correlation of the unit boundaries with those of the Pliocene deposits of the eastern Betic basins remains difficult. According to the biostratigraphical data, the Pl-1, Pl-2, and Pl-3 units correspond to the Pliocene-I by Montenat (1990), while the Pl-4 unit may be equivalent to the Pliocene-II.