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

  1. Luis Miguel Cáceres Puro 1
  2. Joaquín Rodríguez Vidal 2
  3. Antonio Rodríguez Ramírez 2
  4. Mercedes Cantano Martín 2
  1. 1 Instituto de Recursos Naturales y Agrobiología, España
  2. 2 Universidad de Huelva, España
Journal:
Geogaceta

ISSN: 0213-683X

Year of publication: 1996

Issue Title: 21a Sesión Científica, Huelva 1996

Issue: 21

Pages: 43-46

Type: Article

More publications in: Geogaceta

Abstract

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.