Early Holocene volcanic ash fallout in the Yammoûneh lacustrine basin (Lebanon): Tephrochronological implications for the Near East

A volcanic ash layer (Tyam-1) was identified in Holocene sediments from the Yammoûneh paleo-lake (Lebanon). The ash layer consisted of colourless shards. The major elemental chemistry of the glass as determined by electron microprobe analyses indicates a rhyolitic composition. Radiocarbon dating of...

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Bibliographic Details
Published in:Journal of volcanology and geothermal research 2009-10, Vol.186 (3), p.416-425
Main Authors: Develle, A-L., Williamson, D., Gasse, F., Walter-Simonnet, A-V.
Format: Article
Language:English
Subjects:
Crystalline rocks
Earth Sciences
Earth, ocean, space
Environmental Sciences
Exact sciences and technology
Freshwater
Global Changes
Holocene
Igneous and metamorphic rocks petrology, volcanic processes, magmas
lacustrine sequence
Lebanon
Sciences of the Universe
tephra
Volcanology
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Summary:A volcanic ash layer (Tyam-1) was identified in Holocene sediments from the Yammoûneh paleo-lake (Lebanon). The ash layer consisted of colourless shards. The major elemental chemistry of the glass as determined by electron microprobe analyses indicates a rhyolitic composition. Radiocarbon dating of detrital wood fragments located in the ash layer suggests an age of approximately 8.6 ka cal. BP. The timing of the layer and a chemical comparison with other published data suggest that Tyam-1 likely originated from Anatolia, and likely corresponds to early Holocene Z3–Z4–Z5 tephras. The preliminary results provided in this manuscript suggest a new stratigraphical and chronological marker for the continental records of Lebanon and neighbouring regions.
ISSN:0377-0273
1872-6097
DOI:10.1016/j.jvolgeores.2009.07.016