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Titolo:
POSTDEPOSITIONAL MODIFICATION OF THE LINEAR SAND RIDGES OF THE WEST KIMBERLEY AREA OF NORTH-WEST AUSTRALIA
Autore:
GOUDIE AS; STOKES S; LIVINGSTONE I; BAILIFF IK; ALLISON RJ;
Indirizzi:
UNIV OXFORD,MANSFIELD RD OXFORD OX1 3TB ENGLAND UNIV OXFORD ARCHAEOL & HIST ART RES LAB OXFORD OX1 3QJ ENGLAND COVENTRY UNIV,DEPT GEOG COVENTRY CV1 5FB ENGLAND DEPT GEOG DURHAM DH1 2LE ENGLAND UNIV DURHAM,DEPT ARCHAEOL DURHAM DH1 3HP ENGLAND UNIV DURHAM,DEPT ARCHAEOL DURHAM DH1 3HP ENGLAND
Titolo Testata:
Geographical journal
, volume: 159, anno: 1993,
parte:, 3
pagine: 306 - 317
SICI:
0016-7398(1993)159:<306:PMOTLS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
DUNEFIELD; SEDIMENTS; KALAHARI; DESERT;
Keywords:
AUSTRALIA; DUNES; WEATHERING; CHRONOLOGY; DEGRADATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
A.S. Goudie et al., "POSTDEPOSITIONAL MODIFICATION OF THE LINEAR SAND RIDGES OF THE WEST KIMBERLEY AREA OF NORTH-WEST AUSTRALIA", Geographical journal, 159, 1993, pp. 306-317

Abstract

Late Quaternary linear dunes of the west Kimberley area of tropical north-western Australia exhibit an extensive degree of post-depositional modification. Evidence for modification includes degraded overall morphology in cross profile, severe reddening, high (typically 20-25 percent) silt and clay contents, and complete pseudomorphic replacement of some mineral components. All the modification took place subsequentto the emplacement of the dune ridges which, based on luminescence dating, occurred since latest Pleistocene and earliest Holocene times. Accelerator radiocarbon dating of particulate charcoal from discontinuous, sub-horizontal lenses within the dunes was found to produce ages inconsistent both with the chronology erected using luminescence methods and stratigraphic inferences. A combination of petrographic, SEM andXRD investigations suggests that much of the dune reddening is the result of in situ hematite crystallization within kaolinitic grain coatings, which are responsible for the high fines content of the dunes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:46:14