AustralieFrV1, Main, Exploration, bibRecord, 00C485

Response of aeolian systems to Holocene climatic and hydrologic changes on the northern margin of the Sahara: a high-resolution record from the Chott Rharsa basin, Tunisia

Identifieur interne : 00C485 ( Main/Exploration ); précédent : 00C484; suivant : 00C486

Response of aeolian systems to Holocene climatic and hydrologic changes on the northern margin of the Sahara: a high-resolution record from the Chott Rharsa basin, Tunisia

Auteurs : C. Swezey [États-Unis] ; N. Lancaster [États-Unis] ; G. Kocurek [États-Unis] ; M. Deynoux [France] ; M. Blum [États-Unis] ; D. Price [Australie] ; J. C. Pion [France]

Source :

Holocene (Sevenoaks) [ 0959-6836 ] ; 1999-02.

RBID : ISTEX:9225012776C9342E78430EF12145D90C26867878

Descripteurs français

Pascal (Inist)
- Afrique, Chott Rharsa, Géologie et climatologie, Géomorphologie, Holocène, Pléistocène, Sahara, Sédimentologie, Tunisie.
Wicri :
- geographic : Tunisie, Tunisie.
- topic : Géomorphologie, Sédimentologie.

English descriptors

Abstract

Four millennial-scale latest Pleistocene to Holocene climatic cycles are recorded by aeolian-lacus trine strata along the southern margin of Chott Rharsa, a playa situated within an active tectonic basin along the northern margin of the Sahara Desert in Tunisia. Cycles are characterized by (1) a humid phase of dunefield stabilization and high lake levels, and (2) an arid phase of playa desiccation and deflation with dunefield construction. The cycles overall define a progressive drying trend and correlate well with a detailed chronology from Morocco and with the Sahara region in general for the latest Pleistocene and early Holocene. Climatic events appear more regional in nature for the later Holocene. An isolated outcrop of aeolian deposits dated at >86 ka BP argues for records of older cycles in the Chott Rharsa Basin that were subsequently removed by long-term deflation in the area.

Url:

https://api.istex.fr/document/9225012776C9342E78430EF12145D90C26867878/fulltext/pdf

DOI: 10.1191/095968399670329816

Affiliations:

Le document en format XML

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<term>Aeolian accumulations</term>
<term>Aeolian activity</term>
<term>Aeolian construction</term>
<term>Aeolian deposits</term>
<term>Aeolian sands</term>
<term>Aeolian systems</term>
<term>Aeolian unit</term>
<term>Africa</term>
<term>Arid</term>
<term>Arid episodes</term>
<term>Arid phase</term>
<term>Atlantic temperatures</term>
<term>Atlas mountains</term>
<term>Carbonate</term>
<term>Carbonate rock fragments</term>
<term>Carte geologique</term>
<term>Catastrophic rise</term>
<term>Chott</term>
<term>Chott rharsa</term>
<term>Chott rharsa basin</term>
<term>Climatic</term>
<term>Climatic change</term>
<term>Climatic changes</term>
<term>Climatic events</term>
<term>Climatic subcycles</term>
<term>Coque</term>
<term>Crescentic dunes</term>
<term>Crust</term>
<term>Crust formation</term>
<term>Desert margins</term>
<term>Djerid</term>
<term>Djerid ridge</term>
<term>Dune</term>
<term>Dune topography</term>
<term>Early holocene</term>
<term>Elevation</term>
<term>Elevation range</term>
<term>Environmental change</term>
<term>Fourth cycle</term>
<term>Fresh water</term>
<term>Gasse</term>
<term>Geological society</term>
<term>Geology and climatology</term>
<term>Geomorphology</term>
<term>Grain size</term>
<term>Groundwater seepage</term>
<term>Gypsum</term>
<term>Gypsum crust</term>
<term>Hadley cell</term>
<term>Holocene</term>
<term>Holocene climate</term>
<term>Humid</term>
<term>Humid period</term>
<term>Humid phase</term>
<term>Hydrological changes</term>
<term>Lacustrine</term>
<term>Lacustrine deposits</term>
<term>Lacustrine unit</term>
<term>Lake cycle</term>
<term>Lake tigalmamine</term>
<term>Last deglaciation</term>
<term>Latest pleistocene</term>
<term>Major cycles</term>
<term>Many places</term>
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<term>Pleistocene strata</term>
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<term>Sediment</term>
<term>Sedimentology</term>
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<term>Southern tunisia</term>
<term>Stratigraphic</term>
<term>Stratigraphic context</term>
<term>Stratigraphic record</term>
<term>Study area</term>
<term>Subtropical belt</term>
<term>Thermoluminescence</term>
<term>Tigalmamine</term>
<term>Tunisia</term>
<term>Tunisie</term>
<term>Universite louis pasteur</term>
<term>Upper part</term>
<term>Widespread aeolian activity</term>
<term>Younger dryas event</term>
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<term>Chott Rharsa</term>
<term>Géologie et climatologie</term>
<term>Géomorphologie</term>
<term>Holocène</term>
<term>Pléistocène</term>
<term>Sahara</term>
<term>Sédimentologie</term>
<term>Tunisie</term>
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<term>Aeolian accumulations</term>
<term>Aeolian activity</term>
<term>Aeolian construction</term>
<term>Aeolian deposits</term>
<term>Aeolian sands</term>
<term>Aeolian systems</term>
<term>Aeolian unit</term>
<term>Arid</term>
<term>Arid episodes</term>
<term>Arid phase</term>
<term>Atlantic temperatures</term>
<term>Atlas mountains</term>
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<term>Carbonate rock fragments</term>
<term>Carte geologique</term>
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<term>Climatic change</term>
<term>Climatic changes</term>
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<term>Djerid ridge</term>
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<term>Stratigraphic context</term>
<term>Stratigraphic record</term>
<term>Study area</term>
<term>Subtropical belt</term>
<term>Thermoluminescence</term>
<term>Tigalmamine</term>
<term>Tunisia</term>
<term>Tunisie</term>
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<term>Younger dryas event</term>
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<front><div type="abstract" xml:lang="en">Four millennial-scale latest Pleistocene to Holocene climatic cycles are recorded by aeolian-lacus trine strata along the southern margin of Chott Rharsa, a playa situated within an active tectonic basin along the northern margin of the Sahara Desert in Tunisia. Cycles are characterized by (1) a humid phase of dunefield stabilization and high lake levels, and (2) an arid phase of playa desiccation and deflation with dunefield construction. The cycles overall define a progressive drying trend and correlate well with a detailed chronology from Morocco and with the Sahara region in general for the latest Pleistocene and early Holocene. Climatic events appear more regional in nature for the later Holocene. An isolated outcrop of aeolian deposits dated at >86 ka BP argues for records of older cycles in the Chott Rharsa Basin that were subsequently removed by long-term deflation in the area.</div>
</front>
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Serveur d'exploration sur les relations entre la France et l'Australie

Response of aeolian systems to Holocene climatic and hydrologic changes on the northern margin of the Sahara: a high-resolution record from the Chott Rharsa basin, Tunisia

Response of aeolian systems to Holocene climatic and hydrologic changes on the northern margin of the Sahara: a high-resolution record from the Chott Rharsa basin, Tunisia

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur les relations entre la France et l'Australie
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