The origin of the Sierra de Aracena hollows in the Sierra Morena, Huelva, Andalucia, Spain

Auteurs :
RECIO ESPEJO, J.M.
FAUST, D.
NUÑEZ GRANADOS, M.A.

Description :
These hollows are geoecologically unusual macroforms. They are underlain by deeply weathered bedrock but have eutrophic soils with distinctive vegetation. Paleosols with very dark colors, a predominance of smectites and large amounts of total and free iron occur on the floors on the hollows. An evolutionary model is proposed for the hollows, involving differential weathering during the Mesozoic on plutonic and amphibolic rocks, alpine tectonic activity followed by Quaternary erosion and exhumation leading to formation of erosional terraces.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2002, vol. 45, n°. 3-4, p. 197-209, nombre de pages : 13, Collation : Illustration, Références bibliographiques : 38 ref.

Date :
2002

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier