It extends a wide plain, after passing the foothills, corresponding to the Depression of the Ebro. To the southwest is the Sierra de Alcubierre ranges (811 m) one of the typical limestone plateaus of the Depression.

The depression of the Ebro is a tectonic pit filled with sedimentary materials, accumulated in the Tertiary age in horizontal series. In the centre, fine materials such as clays, plasters and limestones were deposited. To the south of the Ebro have been the limestone plateaus of Borja and of Zaragoza.