Procesos kársticos en la Formación Calcarenita de Niebla (Huelva).
- Cáceres, L.M. 1
- Rodríguez Vidal, J. 2
- Rodríguez Ramírez, A. 2
- Cantano, M. 2
- 1 Instituto de Recursos Naturales y Agrobiología, España
- 2 Universidad de Huelva, España
ISSN: 0213-683X
Año de publicación: 1996
Título del ejemplar: 21a Sesión Científica, Huelva 1996
Número: 21
Páginas: 43-46
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
The development of a cavered karst in the Miocene calcarenite formation in the N area of Niebla (Huelva) has been studied. The cover consists of sediments of Quaternary terraces of the River Tinto (T9, T8, T7 and T6), and to a lesser degree, fragments of Mio-PIiocene clays ("blue marls"). Solution of the caLcarenite has originated vertical pipes of varying size evolving in the top to form funnel-shaped channels of preferential solution. These karstified areas generate closed depressions that appear on the surface as alluvial dolines, basically bowl-shaped with smooth edges. Later erosion by streams has resulted in fluvial capture of the depressions and the breaking up of the alluvial cover; obstructing identification of the these landforms.