Los deslizamientos rotacionales del valle del río Tajuñaresultados preliminares
- 1 Dto. de Geología, Escuela Politécnica S. de Zamora
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 891-894
Type: Article
More publications in: Geotemas (Madrid)
Abstract
River erosion in Tajuña basin has originated stepped cliffs with up to 200 meters of level difference between the valley and the calcareous platform of the páramo. In this context rotational landslides have taken place helped by the occurrence of high plasticity and low strength clayey beds. Landslides in the northern part of the area under study (sheets No 511, Brihuega and No 536, Gualajara, of the Spanish Topographic Map scale 1:50.000) are scarce, isolated and spatially related to high plasticity lens-shaped clayey levels. On the other hand, in the south of studied area (southwest of sheet No 561, Pastrana) and surroundings, high plasticity clays and silty-clays are more continuous and have higher thickness. The presence of these beds together with a favorable tectonic faulting has originated the break-down of most of the hillsides as gully erosion has progressed.