Citation
Arenas, Concha and Sancho, Carlos and Vázquez Urbez, Marta and Pardo, Gonzalo and Hellstrom, John and Ortiz Menéndez, José Eugenio and Torres Pérez-Hidalgo, Trinidad José and Cinta Osácar, Maria and Auqué, Luis
(2010).
Las tobas cuaternarias del río Añamaza (provincia de Soria, Cordillera Ibérica): aproximación cronológica.
"Geogaceta"
(n. 49);
pp. 51-54.
ISSN 0213-683X.
Abstract
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 70 m thick, in which prograding-aggrading wedges separated by erosional surfaces exist. Several episodes of tufa formation have been distinguished by means of U-series, Amino-acid racemization and radiocarbon techniques. These correlate to MIS 8, 7, 5 and 1. The presence of MIS 9 is uncertain, as chronological data may also correspond to older stages. Most tufas in this area formed in MIS 5. Distinct tufa episodes can also be distinguished in the Holocene. These are the first chronological data presented for one of the northernmost Quaternary tufa systems in the Iberian Ranges.