[2] Betic corridor rock facies consist of heterozoan bioclastic carbonates and mixed siliciclastic–carbonates with conglomerates appearing in local fan-delta deposits.
In central outcrops, they reach up to 15 m in height and some tens of metres in length and point both to the east and to the west.
The westernmost outcrops show the largest cross-bedded structures, up to 20 m in height and some hundreds of metres in length, all pointing to the west.
The Miocene evolution towards the formation of the Betic corridor can be divided into a series of steps.
The closing of the Betic corridor is recorded by the presence of lagoonal, silty sediments covered by a stromatolite layer and crowned by a red soil in the westernmost outcrops.