IGB

Connexion

(Article of periodic en Anglais - 2011)

Document title

On the origin and significance of basal notches or footcaves in karst terrains

Authors(s) and Affiliation(s)

MCDONALD R.C. ; TWIDALE C.R. (1) ;
(1) School of Earth and Environmental Sciences, Geology and Geophysics, Univ. of Adelaid, Adelaide, AUSTRALIE

Abstract

In the humid tropics, footcaves and swamp slots are associated with surface and shallow groundwaters charged with chemicals and biota. The indents developed around the bases of widely separated karst towers are responsible for their conversion from cupolas or domical residuals. Even in mature tower karst landscapes, some arcuate footcaves are shaped by laterally corrading streams in flood that have transported and deposited exotic debris. Such corrasion is, however, particularly widespread in youthful karst where valley floors are narrow. Here, footcaves not only may have been initiated, but also occasionally maintained, enhanced, and modified by migrating streams, as well as by scarp-foot weathering and sapping. Microorganisms that colonize moist walls of footcaves may also have contributed

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2011, vol. 32, no3 [pp. 195-216]

Bibliographic references : 4 p.

Collation : 13 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.2747/0272-3646.32.3.195

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
Refdoc record number (ud4) : 25804144 : Permanent link - XML version
Powered by Pxxo