Mediterranean tephra stratigraphy revisited : Results from a long terrestrial sequence on Lesvos Island, Greece
Identifieur interne : 000143 ( Main/Exploration ); précédent : 000142; suivant : 000144Mediterranean tephra stratigraphy revisited : Results from a long terrestrial sequence on Lesvos Island, Greece
Auteurs : V. Margari [Royaume-Uni] ; D. M. Pyle [Royaume-Uni] ; C. Bryant [Royaume-Uni] ; P. L. Gibbard [Royaume-Uni]Source :
- Journal of volcanology and geothermal research [ 0377-0273 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Téphra, Stratigraphie, Pléistocène, Pyroclastite, Eruption, Campanien, Ignimbrite, Ponce, Tuf volcanique, Modèle, Chronologie, Haute résolution, Pollen, Période glaciaire, Tephrostratigraphie, Colonne stratigraphique, Datation, C 14, Analyse chimique, Terre rare, Granulométrie, Champs Phlégréens, Volcan Santorin, Ile Lesvos, Ile Pantelleria, Arc Hellénique, Anatolie.
English descriptors
- KwdEn :
- Anatolia, C-14, Campanian, Hellenic Arc, Pantelleria, Phlegraean Fields, Pleistocene, Santorin, chemical analysis, chronology, dating, eruptions, glacial periods, granulometry, high resolution, ignimbrite, models, pollen, pumice, pyroclastics, rare earths, stratigraphic columns, stratigraphy, tephra, tephrostratigraphy, tuff.
Abstract
A composite 40.2 m sediment sequence from Megali Limni, Lesvos Island, Greece, spanning the interval from 22 to 62 ka BP, contains six Pleistocene tephra layers, which can be identified on the basis of their major and trace elemental compositions. The youngest tephra deposit correlates with the 22 ka Y-2 marker, erupted during the Cape Riva eruption of Santorini. The second tephra originates from the Campanian area in Italy and corresponds to the Campanian Ignimbrite eruption (the 39 ka Y-5 marker). The next two layers are compositionally identical, and originate from Eastern islands of the Hellenic Arc; they could potentially correspond to the Upper and Lower Pumice eruptions of Nisyros or some other previously unidentified eruption from Yali. The fifth stratum corresponds to the Y-6 marker, which erupted during the Green Tuff eruption of the Pantelleria Island. The source of the last tephra layer is either the Yali-Nisyros complex or Central Anatolia; no specific corresponding eruption has yet been found. Long distal tephra sequences within terrestrial settings are rare in the eastern Mediterranean and the Megali Limni record contains the most complete sequence to date. Moreover, its age model, based on independent chronologies such as AMS and conventional radiocarbon dates and high-resolution pollen stratigraphy, provides new ages for these eruptions and places them within the context of the millennial-scale palaeoenvironmental variability of the last glacial period.
Affiliations:
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Le document en format XML
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Pyle</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Department of Earth Sciences, University of Cambridge, Downing Street</s1><s2>CB2 3EQ</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>CB2 3EQ</wicri:noRegion><orgName type="university">Université de Cambridge</orgName><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName></affiliation></author><author><name sortKey="Bryant, C" sort="Bryant, C" uniqKey="Bryant C" first="C." last="Bryant">C. 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Gibbard</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Quaternary Palaeoenvironments Group, Department of Geography, University of Cambridge, Downing Place</s1><s2>CB2 3EN</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>CB2 3EN</wicri:noRegion><orgName type="university">Université de Cambridge</orgName><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of volcanology and geothermal research</title><title level="j" type="abbreviated">J. volcanol. geotherm. res.</title><idno type="ISSN">0377-0273</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of volcanology and geothermal research</title><title level="j" type="abbreviated">J. volcanol. geotherm. res.</title><idno type="ISSN">0377-0273</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anatolia</term><term>C-14</term><term>Campanian</term><term>Hellenic Arc</term><term>Pantelleria</term><term>Phlegraean Fields</term><term>Pleistocene</term><term>Santorin</term><term>chemical analysis</term><term>chronology</term><term>dating</term><term>eruptions</term><term>glacial periods</term><term>granulometry</term><term>high resolution</term><term>ignimbrite</term><term>models</term><term>pollen</term><term>pumice</term><term>pyroclastics</term><term>rare earths</term><term>stratigraphic columns</term><term>stratigraphy</term><term>tephra</term><term>tephrostratigraphy</term><term>tuff</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Téphra</term><term>Stratigraphie</term><term>Pléistocène</term><term>Pyroclastite</term><term>Eruption</term><term>Campanien</term><term>Ignimbrite</term><term>Ponce</term><term>Tuf volcanique</term><term>Modèle</term><term>Chronologie</term><term>Haute résolution</term><term>Pollen</term><term>Période glaciaire</term><term>Tephrostratigraphie</term><term>Colonne stratigraphique</term><term>Datation</term><term>C 14</term><term>Analyse chimique</term><term>Terre rare</term><term>Granulométrie</term><term>Champs Phlégréens</term><term>Volcan Santorin</term><term>Ile Lesvos</term><term>Ile Pantelleria</term><term>Arc Hellénique</term><term>Anatolie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A composite 40.2 m sediment sequence from Megali Limni, Lesvos Island, Greece, spanning the interval from 22 to 62 ka BP, contains six Pleistocene tephra layers, which can be identified on the basis of their major and trace elemental compositions. The youngest tephra deposit correlates with the 22 ka Y-2 marker, erupted during the Cape Riva eruption of Santorini. The second tephra originates from the Campanian area in Italy and corresponds to the Campanian Ignimbrite eruption (the 39 ka Y-5 marker). The next two layers are compositionally identical, and originate from Eastern islands of the Hellenic Arc; they could potentially correspond to the Upper and Lower Pumice eruptions of Nisyros or some other previously unidentified eruption from Yali. The fifth stratum corresponds to the Y-6 marker, which erupted during the Green Tuff eruption of the Pantelleria Island. The source of the last tephra layer is either the Yali-Nisyros complex or Central Anatolia; no specific corresponding eruption has yet been found. Long distal tephra sequences within terrestrial settings are rare in the eastern Mediterranean and the Megali Limni record contains the most complete sequence to date. Moreover, its age model, based on independent chronologies such as AMS and conventional radiocarbon dates and high-resolution pollen stratigraphy, provides new ages for these eruptions and places them within the context of the millennial-scale palaeoenvironmental variability of the last glacial period.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Angleterre de l'Est</li></region><settlement><li>Cambridge</li></settlement><orgName><li>Université de Cambridge</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Margari, V" sort="Margari, V" uniqKey="Margari V" first="V." last="Margari">V. Margari</name></region><name sortKey="Bryant, C" sort="Bryant, C" uniqKey="Bryant C" first="C." last="Bryant">C. Bryant</name><name sortKey="Gibbard, P L" sort="Gibbard, P L" uniqKey="Gibbard P" first="P. L." last="Gibbard">P. L. Gibbard</name><name sortKey="Pyle, D M" sort="Pyle, D M" uniqKey="Pyle D" first="D. M." last="Pyle">D. M. Pyle</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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