Las tobas cuaternarias del río Añamaza (provincia de Soria, Cordillera Ibérica): aproximación cronológica

Autor: Arenas, Concha, Sancho, Carlos, Vázquez Urbez, Marta, Pardo, Gonzalo, Hellstrom, John, Ortiz Menéndez, José Eugenio, Torres Pérez-Hidalgo, Trinidad José, Cinta Osácar, Maria, Auqué, Luis
Jazyk: Spanish; Castilian
Rok vydání: 2010
Předmět:
Zdroj: Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname
Geogaceta, ISSN 0213-683X, 2010, No. 49
Archivo Digital UPM
Universidad Politécnica de Madrid
Popis: 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
Databáze: OpenAIRE