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A geochemical approach on reconstructing Upper Pleistocene environmental conditions from wadi deposits – an example from the Wadi Sabra (Jordan)

Climatic signals in geomorphological systems

Auteur(s) et Affiliation(s)

BERTRAMS, M.
Dept. of Geography, RWTH Univ., Aachen, Allemagne
PROTZE, J.
Dept. of Geography, RWTH Univ., Aachen, Allemagne
ECKMEIER, E.
Inst. of Crop Science and Resource Conservation (INRES), Soil Science and Soil Ecology, Univ., Bonn, Allemagne
LEHMKUHL, F.
Dept. of Geography, RWTH Univ., Aachen, Allemagne


Description :
Stratified Upper Pleistocene sediment sequences have been geochemically investigated in the arid environment of the Wadi Sabra (Southern Jordan). A combined approach of CNS analysis, carbonate fractionation, electrical conductivity, and colour spectrophotometry supported by selective XRF scanning and chemical iron extraction was used to elaborate the nature and characteristics of various fine grained calcrete horizons. Although a detailed palaeoenvironmental interpretation of these deposits was complicated by an inhomogeneous distribution of precipitated solutes, a diversity of source materials, and potential sedimentation gaps, the results indicate that most of the fine grained deposits represent fossil and relict palaeosol horizons. Consequently, the study area might have experienced repeated phases of landscape stability and initial soil development during the latest phase of the Upper Pleistocene before a change in hydrological conditions initiated a distinctive erosional period that prevailed during most of the Holocene until modern times.


Type de document :
Article de monographie

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2014, vol. 58, n°. 1, Supl., p. 51-80, nombre de pages : 30, Références bibliographiques : 92 ref.

Date :
2014

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger

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