El antiguo deslizamiento rocoso del Peñón de Ocenilla (Sierra de Cabrejas, Cordillera Ibérica, Soria)

Abstract

A large-dimension rockslide occurred at one end of the 80 m high calcareous cliff face of the so-called Peñón de Ocenilla, where the inclination of the dip is 12° greater than the slope. A large mass of limestone and marly limestone slipped along the contact with the underlying marl deposits in a single, rapid displacement. The blocks were intensely fractured in this rockfall, producing an accumulation of 5x106 m3 coarse scree. Based on the Celtiberian ceramics found in the surface of the rockslide mass, the antiquity of the rockslide may have at least more than 2100 BP, possibly from the upper or middle Holocene, due to its relatively well preserved geomorphological characteristics