Resumen de El relleno aluvial del Sistema de las Cuevas de Seso (Boltaña, Pinireo Central): primeras consideraciones paleoambientales

M. Bartolomé, Carlos Sancho Marcén, Ana Moreno Caballud, Belén Oliva Urcia, Arsenio Muñoz Jiménez, María Cinta Osácar Soriano, Graciela Gil Romera, José Luis Peña Monné, Josep Mas Pla, Xavier Fuertes Ferrer

• Stratigraphic, chronological, geoarchaeological and geochemical data from the alluvial sedimentary filling recorded in the pseudokarstic Seso Cave System (Central Pyrenees) allow carrying out a Late Holocene palaeoenvironmental preliminary reconstruction. Two sedimentary units have been differentiated. The older one (2000-1500 years BP) is made of siltyclayey deposits coming from the mechanical washing inside the cave and accumulated in a ponding environment during the Ibero- Roman Humid Period (IRHP). The upper unit (1500-670 years BP) is made of sandy-silty alluvial deposits entering the cave from the erosion of soils developed on the bedrock under more arid conditions during the Medieval Climate Anomaly. High differences in the sedimentation rates have been deduced throughout the studied time period. In addition, two levels of human settlement in the cave have been evidenced from pottery and charcoal remnants at Iberian and Late Roman ages.