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<title lang=en>Early Pleistocene climatic cycles in continental deposits of the Lesser Caucasus of Armenia inferred from palynology, magnetostratigraphy, and 40Ar/39Ar dating</title>
<creator>Joannin, Sebastien</creator>
<creator>Cornee, Jean-Jacques</creator>
<creator>Münch, Philippe</creator>
<creator>Fornari, Michel</creator>
<creator>Vasiliev, Iuliana</creator>
<creator>Krijgsman, Wout</creator>
<creator>Nahapetyan, Samuel</creator>
<creator>Gabrielyan, Ivan</creator>
<creator>Ollivier, Vincent</creator>
<creator>Roiron, Paul</creator>
<creator>Chataigner, Christine</creator>
<contributor>Laboratoire Chrono-environnement (LCE) ; Université Bourgogne Franche-Comté (UBFC) - Université de Franche-Comté (UFC) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Paléoenvironnement et paléobiosphère (PP) ; Université Claude Bernard Lyon 1 (UCBL) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Maison des Sciences de l'Homme et de l'Environnement Claude Nicolas Ledoux (MSHE) ; Centre National de la Recherche Scientifique (CNRS) - Université de Franche-Comté (UFC)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géoazur (GEOAZUR) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA) - Université Côte d'Azur (UCA) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire de la Côte d'Azur - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Paleomagnetic Laboratory ‘Fort Hoofddijk', Utrecht University, Faculty of Geosciences ; Utrecht University [Utrecht]</contributor>
<contributor>ARCHEORIENT - Environnements et sociétés de l'Orient ancien (Archéorient) ; Université Lumière - Lyon 2 (UL2) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire méditerranéen de préhistoire Europe-Afrique (LAMPEA) ; Institut de Recherche pour le Développement (IRD) - Aix Marseille Université (AMU) - Ministère de la Culture et de la Communication (MCC) - Institut national de recherches archéologiques préventives (Inrap) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Centre de Bio-Archéologie et d'Ecologie (CBAE) ; Université Montpellier 2 - Sciences et Techniques (UM2) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>French CNRS “ECLIPSE” program Environnements quaternaires du Petit Caucase : forçage du volcanisme, des glaciations et de l'Homme.</contributor>
<description>International audience</description>
<source>ISSN: 0012-821X</source>
<source>Earth and Planetary Science Letters</source>
<publisher>Elsevier</publisher>
<identifier>hal-00470353</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00470353</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00470353</source>
<source>Earth and Planetary Science Letters, Elsevier, 2010, 291 (1-4), pp.149-158. 〈10.1016/j.epsl.2010.01.007〉</source>
<identifier>DOI : 10.1016/j.epsl.2010.01.007</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2010.01.007</relation>
<language>en</language>
<subject lang=en>climate.</subject>
<subject lang=en>magnetostratigraphy</subject>
<subject lang=en>Western Asia</subject>
<subject lang=en>Caucasus paleovegetation</subject>
<subject lang=en>40Ar/39Ar dating</subject>
<subject lang=en>climate</subject>
<subject lang=en>Early Pleistocene</subject>
<subject>[SDE] Environmental Sciences</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<subject>[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<subject>[SHS.ENVIR] Humanities and Social Sciences/Environmental studies</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Plio-Pleistocene diatomitic sequences in the Shamb paleo-lake (South Armenia, Lesser Caucasus) offer a rare opportunity to give new insights on the paleo-climate of Western Asia. We present an integrated palynological, 40Ar/39Ar geochronologic and magnetostratigraphic study for the most complete section in the sedimentary deposits of the Shamb paleo-lake. 40Ar/39Ar dating of two volcaniclastic layers provided ages of 1.24 ± 0.03 and 1.16 ± 0.02 Ma (2. Magnetostratigraphic data show that the entire Shamb section is of reversed polarity which, combined with 40Ar/39Ar dating, suggests that the entire section correlates with part of the Matuyama period (1.785-1.070 Ma). Pollen assemblages and macroremains diversity clearly show an alternation of glacial and interglacial phases. Age calibrations and accumulation rate extrapolation allow a direct correlation of climate changes with the global isotopic curve, and show that the Shamb section probably ranges from approximately 1.300 to 1.080 Ma (marine isotopic stages 40 to 31). The vegetation of the Lesser Caucasus developed in a mosaic pattern in a Pleistocene continental, mostly arid climate, comparable to the present-day climate. The observed vegetation changes record a dominant climate response to the obliquity orbital parameter, but the influence of precession could not be established from the Shamb data. Pollen and macroflora both indicate that glacial periods were cold and dry and that interglacials were warm with local humidity. The early Pleistocene climatic model for Western Asia is thus similar to the climatic model for the Mediterranean area.</description>
<date>2010-01-27</date>
</dc>
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