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 : 005F17 ( PascalFrancis/Checkpoint ); précédent : 005F16; suivant : 005F18Response 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. Prices [Australie] ; J.-C. Pion [France]Source :
- The Holocene : (Sevenoaks) [ 0959-6836 ] ; 1999.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Tunisie.
- topic : Géomorphologie, Sédimentologie.
English descriptors
- KwdEn :
Abstract
Four millennial-scale latest Pleistocene to Holocene climatic cycles are recorded by aeolian-lacustrine 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 (I) 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.
Affiliations:
- Australie, France, États-Unis
- Alsace (région administrative), Grand Est
- Strasbourg
- Université Strasbourg 1
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Lancaster</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Desert Research Institute, University of Nevada</s1><s2>Reno, Nevada 89506</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Reno, Nevada 89506</wicri:noRegion></affiliation></author><author><name sortKey="Kocurek, G" sort="Kocurek, G" uniqKey="Kocurek G" first="G." last="Kocurek">G. Kocurek</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Geological Sciences, University of Texas</s1><s2>Austin, Texas 78712</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Austin, Texas 78712</wicri:noRegion></affiliation></author><author><name sortKey="Deynoux, M" sort="Deynoux, M" uniqKey="Deynoux M" first="M." last="Deynoux">M. Deynoux</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>CNRS-Centre de Géochimie de la Surface, Université Louis Pasteur</s1><s2>Strasbourg 67084</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67084</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université Strasbourg 1</orgName></affiliation></author><author><name sortKey="Blum, M" sort="Blum, M" uniqKey="Blum M" first="M." last="Blum">M. 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Swezey</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Geological Sciences, University of Texas</s1><s2>Austin, Texas 78712</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Austin, Texas 78712</wicri:noRegion></affiliation></author><author><name sortKey="Lancaster, N" sort="Lancaster, N" uniqKey="Lancaster N" first="N." last="Lancaster">N. Lancaster</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Desert Research Institute, University of Nevada</s1><s2>Reno, Nevada 89506</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Reno, Nevada 89506</wicri:noRegion></affiliation></author><author><name sortKey="Kocurek, G" sort="Kocurek, G" uniqKey="Kocurek G" first="G." last="Kocurek">G. Kocurek</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Geological Sciences, University of Texas</s1><s2>Austin, Texas 78712</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Austin, Texas 78712</wicri:noRegion></affiliation></author><author><name sortKey="Deynoux, M" sort="Deynoux, M" uniqKey="Deynoux M" first="M." last="Deynoux">M. Deynoux</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>CNRS-Centre de Géochimie de la Surface, Université Louis Pasteur</s1><s2>Strasbourg 67084</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67084</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université Strasbourg 1</orgName></affiliation></author><author><name sortKey="Blum, M" sort="Blum, M" uniqKey="Blum M" first="M." last="Blum">M. Blum</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Department of Geosciences, University of Nebraska</s1><s2>Lincoln, Nebraska 68588</s2><s3>USA</s3><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Lincoln, Nebraska 68588</wicri:noRegion></affiliation></author><author><name sortKey="Prices, D" sort="Prices, D" uniqKey="Prices D" first="D." last="Prices">D. Prices</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Thermoluminescence Dating Laboratory, School of Geosciences, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>6 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Pion, J C" sort="Pion, J C" uniqKey="Pion J" first="J.-C." last="Pion">J.-C. Pion</name><affiliation wicri:level="4"><inist:fA14 i1="06"><s1>ORSTOM-GSTS, Université Louis Pasteur</s1><s2>Strasbourg 67084</s2><s3>FRA</s3><sZ>7 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67084</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université Strasbourg 1</orgName></affiliation></author></analytic><series><title level="j" type="main">The Holocene : (Sevenoaks)</title><title level="j" type="abbreviated">Holocene : (Sevenoaks)</title><idno type="ISSN">0959-6836</idno><imprint><date when="1999">1999</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Holocene : (Sevenoaks)</title><title level="j" type="abbreviated">Holocene : (Sevenoaks)</title><idno type="ISSN">0959-6836</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Africa</term><term>Geology and climatology</term><term>Geomorphology</term><term>Holocene</term><term>Pleistocene</term><term>Sahara</term><term>Sedimentology</term><term>Tunisia</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Afrique</term><term>Sahara</term><term>Tunisie</term><term>Géologie et climatologie</term><term>Géomorphologie</term><term>Sédimentologie</term><term>Pléistocène</term><term>Holocène</term><term>Chott Rharsa</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Tunisie</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Géomorphologie</term><term>Sédimentologie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Four millennial-scale latest Pleistocene to Holocene climatic cycles are recorded by aeolian-lacustrine 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 (I) 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></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0959-6836</s0></fA01><fA03 i2="1"><s0>Holocene : (Sevenoaks)</s0></fA03><fA05><s2>9</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>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</s1></fA08><fA11 i1="01" i2="1"><s1>SWEZEY (C.)</s1></fA11><fA11 i1="02" i2="1"><s1>LANCASTER (N.)</s1></fA11><fA11 i1="03" i2="1"><s1>KOCUREK (G.)</s1></fA11><fA11 i1="04" i2="1"><s1>DEYNOUX (M.)</s1></fA11><fA11 i1="05" i2="1"><s1>BLUM (M.)</s1></fA11><fA11 i1="06" i2="1"><s1>PRICES (D.)</s1></fA11><fA11 i1="07" i2="1"><s1>PION (J.-C.)</s1></fA11><fA14 i1="01"><s1>Department of Geological Sciences, University of Texas</s1><s2>Austin, Texas 78712</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></fA14><fA14 i1="02"><s1>Desert Research Institute, University of Nevada</s1><s2>Reno, Nevada 89506</s2><s3>USA</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>CNRS-Centre de Géochimie de la Surface, Université Louis Pasteur</s1><s2>Strasbourg 67084</s2><s3>FRA</s3><sZ>4 aut.</sZ></fA14><fA14 i1="04"><s1>Department of Geosciences, University of Nebraska</s1><s2>Lincoln, Nebraska 68588</s2><s3>USA</s3><sZ>5 aut.</sZ></fA14><fA14 i1="05"><s1>Thermoluminescence Dating Laboratory, School of Geosciences, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>6 aut.</sZ></fA14><fA14 i1="06"><s1>ORSTOM-GSTS, Université Louis Pasteur</s1><s2>Strasbourg 67084</s2><s3>FRA</s3><sZ>7 aut.</sZ></fA14><fA20><s1>141-147</s1></fA20><fA21><s1>1999</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>25948</s2><s5>354000083411670020</s5></fA43><fA44><s0>0000</s0><s1>© 1999 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>37 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>525-99-12250</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>The Holocene : (Sevenoaks)</s0></fA64><fA66 i1="01"><s0>GBR</s0></fA66><fA68 i1="01" i2="1" l="FRE"><s1>La réponse des systèmes éoliens aux modifications climatiques et hydrologiques de la frange nord du Sahara : des données à haute résolution du bassin de Chott Rharsa, Tunisie</s1></fA68><fC01 i1="01" l="ENG"><s0>Four millennial-scale latest Pleistocene to Holocene climatic cycles are recorded by aeolian-lacustrine 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 (I) 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.</s0></fC01><fC02 i1="01" i2="H"><s0>52526</s0><s1>II</s1></fC02><fC02 i1="02" i2="H"><s0>525</s0></fC02><fC03 i1="01" i2="H" l="FRE"><s0>Afrique</s0><s2>NG</s2><s5>01</s5></fC03><fC03 i1="01" i2="H" l="ENG"><s0>Africa</s0><s2>NG</s2><s5>01</s5></fC03><fC03 i1="02" i2="H" l="FRE"><s0>Sahara</s0><s2>NG</s2><s5>02</s5></fC03><fC03 i1="02" i2="H" l="ENG"><s0>Sahara</s0><s2>NG</s2><s5>02</s5></fC03><fC03 i1="03" i2="H" l="FRE"><s0>Tunisie</s0><s2>NG</s2><s5>03</s5></fC03><fC03 i1="03" i2="H" l="ENG"><s0>Tunisia</s0><s2>NG</s2><s5>03</s5></fC03><fC03 i1="04" i2="H" l="FRE"><s0>Géologie et climatologie</s0><s5>04</s5></fC03><fC03 i1="04" i2="H" l="ENG"><s0>Geology and climatology</s0><s5>04</s5></fC03><fC03 i1="05" i2="H" l="FRE"><s0>Géomorphologie</s0><s5>05</s5></fC03><fC03 i1="05" i2="H" l="ENG"><s0>Geomorphology</s0><s5>05</s5></fC03><fC03 i1="06" i2="H" l="FRE"><s0>Sédimentologie</s0><s5>06</s5></fC03><fC03 i1="06" i2="H" l="ENG"><s0>Sedimentology</s0><s5>06</s5></fC03><fC03 i1="07" i2="H" l="FRE"><s0>Pléistocène</s0><s2>NI</s2><s5>08</s5></fC03><fC03 i1="07" i2="H" l="ENG"><s0>Pleistocene</s0><s2>NI</s2><s5>08</s5></fC03><fC03 i1="08" i2="H" l="FRE"><s0>Holocène</s0><s2>NI</s2><s5>09</s5></fC03><fC03 i1="08" i2="H" l="ENG"><s0>Holocene</s0><s2>NI</s2><s5>09</s5></fC03><fC03 i1="09" i2="H" l="FRE"><s0>Chott Rharsa</s0><s2>NG</s2><s2>FS</s2><s4>INC</s4><s5>31</s5></fC03><fN21><s1>277</s1></fN21></pA></standard></inist><affiliations><list><country><li>Australie</li><li>France</li><li>États-Unis</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li></region><settlement><li>Strasbourg</li></settlement><orgName><li>Université Strasbourg 1</li></orgName></list><tree><country name="États-Unis"><noRegion><name sortKey="Swezey, C" sort="Swezey, C" uniqKey="Swezey C" first="C." last="Swezey">C. Swezey</name></noRegion><name sortKey="Blum, M" sort="Blum, M" uniqKey="Blum M" first="M." last="Blum">M. Blum</name><name sortKey="Kocurek, G" sort="Kocurek, G" uniqKey="Kocurek G" first="G." last="Kocurek">G. Kocurek</name><name sortKey="Lancaster, N" sort="Lancaster, N" uniqKey="Lancaster N" first="N." last="Lancaster">N. Lancaster</name></country><country name="France"><region name="Grand Est"><name sortKey="Deynoux, M" sort="Deynoux, M" uniqKey="Deynoux M" first="M." last="Deynoux">M. Deynoux</name></region><name sortKey="Pion, J C" sort="Pion, J C" uniqKey="Pion J" first="J.-C." last="Pion">J.-C. Pion</name></country><country name="Australie"><noRegion><name sortKey="Prices, D" sort="Prices, D" uniqKey="Prices D" first="D." last="Prices">D. Prices</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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