Landforms ancient and recent : the paradox

Auteur :
TWIDALE, C.R.

Description :
Very old etchforms of Cretaceous age or older (Pangaean surfaces) are preserved in many parts of the world. Some have been exposed to the elements for very long periods and their persistence poses problems. Moreover, landforms are actively developing within or immediately adjacent to these palaeosurface remnants. Unconsolidated materials, whether occurring as regolith palaeosurfaces or as deposits in valleys and basins, are readily eroded, but coherent rocks are resistant, particularly in well drained situations. A model involving unequal erosion and positive feedback provides optimal conditions for survival.


Type de document :
Article de périodique

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 1999, vol. 81, n°. 3, p. 431-441, Collation : Illustration, Références bibliographiques : 105 ref.

Date :
1999

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi