Origen de las brechas de la base del Jurásico en Morata de Jalón (Zaragoza)

Abstract

A sedimentary breccia is found in the lower Liassic (Hettangian?) in wide areas of the Iberian Chain (NE Spain). This breccia was originated during a tectonic extension at the onset of the Jurassic by a number of procceses, including: (1) the erosion of the underlying Triassic units; (2) the tectonic breakage of a shallow carbonate platform developed coevally to the tectonic extension. The main contribution of this paper is the finding and description of a lower Liassic carbonate platform, which is preserved on its original position