El papel del piping en la espeleogénesis del sistema endokárstico de Seso (Pirineo central, Huesca) Role of piping processes in the speleogenesis of Seso Cave (Central Pyrenees, Huesca province)

The Seso Cave system (Boltana, Huesca province) in the Southcentral Pyrenees presents a singular speleogenesis. Vadose mechanical entrenchment of highly erosive and dispersive marls (piping processes) is the main espeleogenetic mechanism. Geometric relationship between the endokarstic system and a terrace of the Ara River chronologically controlled allows dating the cave formation in the Upper Pleistocene, probably during stages of the MIS 4 with high water availability.