Consideraciones sobre el final del relleno endorreico de las fosas de Calatayud y Teruel y su paso al exorreismoimplicaciones morfoestratigráficas y estructurales

Abstract

It is shown how the age of the "Fundamental Erosión Surface" and the end of the endorheic infill of Calatayud and Teruel grabens, in the Iberian Range, is not isochronous, but variable between both basins and among different sectors of a certain one. Both, geomorphological and stratigraphical evidences demonstrate how the capture of an endorheic basin and its transition to exorheic conditions is a gradual process, which not necessarily has to be related with tectonic or climatic factors. A post-capture time span may be represented in different sectors of a graben by endorheic sediments, erosional and nondepositional hiatus and alluvial exorheic deposits. On the other hand, the traditional chronostratigraphy of the alluvial fans deposited under exorheic conditions is argued. Finally, the space and time evolution of the capture and transition to exorheic conditions in Teruel and Calatayud grabens and in the Plioquaternary halfgrabens of the central sector of the Iberian range is outlined.