Geochemistry of the Fejej Tuffs (South Omo, Ethiopia), their Tephrostratigraphical Correlation with Plio-Pleistocene Formations in the Omo-Turkana Basin

The FJ-1 Tuff and three additional isolated outcrops of volcanic tuffs listed in the Fejej area (South Omo, Ethiopia) are associated with a single volcanic event and correspond to the same ash deposit subsequently truncated by erosion. Data from new chemical analyses given by X-ray fluorescence allo...

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Veröffentlicht in:Comptes rendus. Palevol 2011-05, Vol.10 (4), p.251-258
Hauptverfasser: Chapon, Cécile, Bahain, Jean-Jacques, Beyene, Yonas, Bilcot, Jean-Baptiste, Guy, Christophe, Jullien, Michel, de Lumley, Henry, Provitina, Olivier
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container_issue 4
container_start_page 251
container_title Comptes rendus. Palevol
container_volume 10
creator Chapon, Cécile
Bahain, Jean-Jacques
Beyene, Yonas
Bilcot, Jean-Baptiste
Guy, Christophe
Jullien, Michel
de Lumley, Henry
Provitina, Olivier
description The FJ-1 Tuff and three additional isolated outcrops of volcanic tuffs listed in the Fejej area (South Omo, Ethiopia) are associated with a single volcanic event and correspond to the same ash deposit subsequently truncated by erosion. Data from new chemical analyses given by X-ray fluorescence allow correlation of these tuffs with the Borana Tuff of the Koobi Fora Formation, which is itself correlated with a tuff in the Upper G member or with the H-1 tuff of the Shungura formation. The geochronological assessment of this tephra is in agreement with previous magnetostratigraphical and biostratigraphical studies, attributing the Fejej FJ-1 Tuff to between 1.95 to 1.90 Ma. Le tuf volcanique FJ-1 et trois autres affleurements isolés de cendres volcaniques recensés dans la région de Fejej (Sud-Omo, Ethiopie) confirment l’enregistrement d’un seul événement volcanique et d’un unique dépôt de cendres tronqué par l’érosion. D’après la nouvelle composition chimique obtenue par fluorescence X et en concordance avec la magnétostratigraphie et la biostratigraphie, le tuf FJ-1 de Fejej, d’âge compris entre 1,95 et 1,90 Ma, peut être corrélé avec le tuf Borana de la formation de Koobi Fora, lui-même rapproché d’un tuf situé dans le membre G supérieur de la formation de Shungura, ou avec le tuf H-1 de cette même formation.
doi_str_mv 10.1016/j.crpv.2011.02.006
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D’après la nouvelle composition chimique obtenue par fluorescence X et en concordance avec la magnétostratigraphie et la biostratigraphie, le tuf FJ-1 de Fejej, d’âge compris entre 1,95 et 1,90 Ma, peut être corrélé avec le tuf Borana de la formation de Koobi Fora, lui-même rapproché d’un tuf situé dans le membre G supérieur de la formation de Shungura, ou avec le tuf H-1 de cette même formation.</description><identifier>ISSN: 1631-0683</identifier><identifier>EISSN: 1777-571X</identifier><identifier>DOI: 10.1016/j.crpv.2011.02.006</identifier><language>eng</language><publisher>Paris: Elsevier SAS</publisher><subject>Archaeology and Prehistory ; Bassin de l’Omo-Turkana ; Crystalline rocks ; Earth sciences ; Earth, ocean, space ; Ethiopia ; Exact sciences and technology ; Fluorescence X ; Glass shards ; Humanities and Social Sciences ; Igneous and metamorphic rocks petrology, volcanic processes, magmas ; Omo-Turkana Basin ; Paleontology ; Plio-Pleistocene ; Plio-Pléistocène ; Stratigraphy ; Tephrostratigraphy ; Téphrostratigraphie ; Verres volcaniques ; Vertebrate paleontology ; Volcano-sedimentary formations ; X ray fluorescence ; Éthiopie</subject><ispartof>Comptes rendus. 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source Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Access via ScienceDirect (Elsevier)
subjects Archaeology and Prehistory
Bassin de l’Omo-Turkana
Crystalline rocks
Earth sciences
Earth, ocean, space
Ethiopia
Exact sciences and technology
Fluorescence X
Glass shards
Humanities and Social Sciences
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Omo-Turkana Basin
Paleontology
Plio-Pleistocene
Plio-Pléistocène
Stratigraphy
Tephrostratigraphy
Téphrostratigraphie
Verres volcaniques
Vertebrate paleontology
Volcano-sedimentary formations
X ray fluorescence
Éthiopie
title Geochemistry of the Fejej Tuffs (South Omo, Ethiopia), their Tephrostratigraphical Correlation with Plio-Pleistocene Formations in the Omo-Turkana Basin
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