Características estructurales de la cuenca de Anayet (Estefaniense-Pérmico, Pirineos centrales)
- L. Rodríguez 1
- J. Cuevas 1
- J.M. Tubía 1
- 1 Universidad del País Vasco UPV/EHU
ISSN: 1576-5172
Year of publication: 2012
Issue Title: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.
Issue: 13
Pages: 437-440
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The Anayet Stephanian-Permian basin is discordant over Devonian and Carboniferous preStephanian rocks in the western part of the Pyrenean Axial Zone. It is WNW- trending and about 10 km long and 3 km wide. The basin is filled by a detrital succession commonly divided in 4 main units (Grey Unit, Transitional Unit, Lower Red Unit and Upper Red Unit), that contain volcanic rocks interbedded. A detailed mapping of the area shows increasingly younger rocks, thicker units and the slope to West, where the depocenter is located. South-vergent asymmetric angular folds with N115 °E trending and almost horizontal axes deform the rocks of the Stephanian-Permian basin. An axial plane cleavage that dips 40º to 60º to the North can be identified. There is a good structural correlation between the recognized structures in the Anayet basin and those observed in the Sierras Interiores (South Pyrenean Zone), generated during the Alpine Orogeny.