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A note on the dorbanks (duripans) of South Africa in Palaeoecology of Africa and the surrounding islands. Volume 15. Southern African Society for Quaternary research. Proceedings.

Auteurs :
ELLIS, F.
SCHLOMS, B. H. A.
COETZEE, J. A.
VAN ZINDEREN BAKKER, E. M.
VOGEL, J. L.
VOIGT, E. A.
PARTRIDGE, T. C.
Southern African Society for Quaternary Research. (SASQUA), Afrique du Sud

Description :
Dorbanks (duripans) are hardened subsurface horizons with reddish brown colours and variable thickness which occur widely in the arid and semi-arid regions of the Cape Province. Both silica and free iron oxides play a role in the cementation of dorbanks. A typical profile has reddish brown, non-calcareous, structureless A and B horizons, underlain by the dorbank, followed directly either by rock or unconsolidated material which may contain calcium carbonate, gypsum, or both. Soils with dorbank occur on near-level terrain (midslopes and footslopes) with slopes rarely exceeding 5 %. There is good evidence that in a specific landscape, dorbanks always occur in the older parts. Investigations so far also indicate that most dorbanks of the arid regions are in equilibrium with present-day soil-forming factors but in some parts of the semi-arid regions (Southern and Eastern Cape) they could be paleosols.


Type de document :
Congrès

Source :
Biennial Conference. 6th, 1981, p. 149-157, Références bibliographiques : 18 réf.

Date :
1982

Identifiants :
isbn : 90-6191-257-1

Editeur :
Pays édition : Inconnu

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)