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(Article of periodic en Anglais - 2011)

Document title

Growth by extension, and reworking, of a south-western Kalahari linear dune

Authors(s) and Affiliation(s)

TELFER M.W. (1 2) ;
(1) School of Geography, Earth and Environmental Sciences, Univ., Plymouth, ROYAUME-UNI
(2) School of Geography and the Environment, Univ., Oxford, ROYAUME-UNI

Abstract

A simple linear dune in the south-western Kalahari, which has a prominent termination on a pan (playa) surface, provides an opportunity to directly test hypotheses of dune extension. Chronostratigraphy along the crest of the dune, constrained by 42 OSL ages, reveals that the dune grew by extension on occasions in the late Pleistocene and early Holocene, but has also been subject to reworking along its length, which has continued until recent times. Dune development by extensional growth is suggested to operate under environmental conditions more conducive to net accumulation, whereas reworking is largely independent of conditions throughout the last 18 ka, and may represent seasonal fluctuations in the position of the dune crest. The relative significance of these two modes of development is suggested to be a key control on the efficacy of linear dunes as archives of environmental and climatic change

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no8 [pp. 1125-1135]

Bibliographic references : 1,5 p.

Collation : 6 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2140

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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