Interpretación y evolución de los parches de fango en el sector norte de la Bahía de Cádiz
- J.M. Parrado Román
- J.M. Gutiérrez Mas
- J.M. Jódar Tenor
- A. Luna del Barco
- M. Achab
ISSN: 1576-5172
Año de publicación: 2000
Título del ejemplar: V Congreso Geológico de España (Alicante, 10-14 julio 2000)
Número: 1
Páginas: 197-202
Tipo: Artículo
Otras publicaciones en: Geotemas (Madrid)
Resumen
Sand-mud patchs formed by gravitational slumps and slides covering sandy sediments have been found in the northern sector of the bay of Cadiz. In this paper we undertake a description and evolution of such seafloor features, by analysing two side scan sonar mosaics obtained in 1990 and 1999 which partially overlap the study area. The sand-mud patches are 300 m long and 100 m wide, and show stretched shapes southwestward oriented. They are laterally continuous and display irregular boundaries. From the comparative analysis between sonograms, it can be asserted that both forms are relatively constant throuth time and they maintain the direction of slumps and slide movement, but they have disminished their size and lost their lateral continuity. This morphologic evolution is related to burying processes by sandy sediments, probably caused by strong storms that have eroded the foreshore and cliffs close to the study area.