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Till fabric and grain-size analysis of glacial sequences in the Upper Sil River Basin, Cantabrian Mountains, NW Spain

Auteur(s) et Affiliation(s)

Dept. of Geography and Geology, Univ., León, Espagne
SANTOS, J.A.
Center for Geographic Studies, Univ., Coimbra, Portugal
Dept. of Geography and Geology, Univ., León, Espagne
REDONDO-VEGA, J.M.
Dept. of Geography and Geology, Univ., León, Espagne
Dept. of Geography and Geology, Univ., León, Espagne


Description :
Fabric and grain-size analysis of 8 deposits present in the Upper Sil River Basin palaeoglacial system, located in the western portion of the Cantabrian Mountains, were used to interpret till types and to reconstruct the glacial paleoprocess history of this region. They are represented by lodgement, deformation, and melt-out tills. The first, representative of glacial advance stages, present cluster fabrics and are generally composed of poorly sorted and finer sediments. Melt-out and deformation tills, representative of stages of glacial stability followed by fast recession, present transitional to girdle fabrics and are composed of poorly sorted coarser sediments. These sequences, most of them located in the snout area of the Sil palaeoglacier, are important in the reconstruction of glacial dynamics. This palaeoglacial system was formed by multiple tributaries and had an extension of over 450 km2, with the Sil paleoglacier being 51 km long during its maximum glacial advance.


Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 2013, vol. 34, n°. 6, p. 471-490, nombre de pages : 20, Références bibliographiques : 3 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)