Procesos kársticos en la Formación Calcarenita de Niebla (Huelva).

• Cáceres, L.M. ^[2] ; Rodríguez Vidal, J. ^[1] ; Rodríguez Ramírez, A. ^[1] ; Cantano, M. ^[1]
  1. [1] Universidad de Huelva

     Universidad de Huelva

     Huelva, España

     
  2. [2] Instituto de Recursos Naturales y Agrobiología, España
• Localización: Geogaceta, ISSN 0213-683X, Nº. 21, 1996 (Ejemplar dedicado a: 21a Sesión Científica, Huelva 1996), págs. 43-46
• Idioma: español
• Títulos paralelos:
  • Karstic processes in the calcarenite formation of Niebla (Huelva, SW Spain)
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• 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.