Mots-clés
Amérique du Sud Cône alluvial Dune Forêt Loess Marais Paléogéographie Plaine Quaternaire Savane Terrasse fluviatile Variation climatique Zone intertropicale Alluvial cone Climatic variation Dune Fluvial terrace Forest Loess Palaeogeography Plain Quaternary Savanna South America SwampBog Tropical zoneGeomorphology and late Quaternary of the Chaco (South America)
Auteur :IRIONDO, M.
Description :
The Chaco is a large tropical plain located in the interior of South America, consisting of parts of Argentina, Paraguay and Bolivia. It is characterized by forests, savannas and extensive swamps, which give it a marked climatic and biogeographic identity. It encompasses five huge alluvial fans built by the major rivers which cross the region. Humid climates, such as the present one, favoured the generation of soils and stable fluvial belts; drier climates led to widespread sedimentation along small ephemeral channels and large spill-outs. During two intervals, on in the late Quaternary glacial maximum and the late Holocene dry climates occurred in the region, leading to the formation of dune fields and loess mantles.
Type de document :
Article de périodique
Source :
Geomorphology (Amsterdam), issn : 0169-555X, 1993, vol. 7, n°. 4, p. 289-303, Collation : Illustration, Références bibliographiques : 19 réf.
Date :
1993
Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)