RT Journal Article T1 Las tobas cuaternarias del río Añamaza (provincia de Soria, Cordillera Ibérica): aproximación cronológica T1 Quaternary tufas of the River Añamaza (NW Iberian Ranges, Spain): a chronological approach A1 Arenas Abad, Concepción A1 Sancho, Carlos A1 Vázquez Urbez, Marta A1 Pardo, Gonzalo A1 Hellstrom, John A1 Ortiz, José Eugenio A1 Torres, Trinidad de A1 Osácar, María Cinta A1 Auqué Sánz, Luis AB High-gradient, stepped fluvial tufa systems with dammed areas existed in the River Añamaza valley(NW Iberian Ranges, Spain) during Quaternary times. Single deposits range from a few meters to about 70m thick, in which prograding-aggrading wedges separated by erosional surfaces exist. Several episodes oftufa formation have been distinguished by means of U-series, Amino-acid racemization and radiocarbontechniques. These correlate to MIS 8, 7, 5 and 1. The presence of MIS 9 is uncertain, as chronological datamay also correspond to older stages. Most tufas in this area formed in MIS 5. Distinct tufa episodes canalso be distinguished in the Holocene. These are the first chronological data presented for one of thenorthernmost Quaternary tufa systems in the Iberian Ranges PB Universidad de Huelva YR 2010 FD 2010 LK http://hdl.handle.net/10272/7477 UL http://hdl.handle.net/10272/7477 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026