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dc.contributor.authorPattan, J.N.
dc.contributor.authorShane, P.
dc.contributor.authorPearce, N.J.G.
dc.contributor.authorBanakar, V.K.
dc.contributor.authorParthiban, G.
dc.date.accessioned2006-08-26T15:15:27Z
dc.date.available2006-08-26T15:15:27Z
dc.date.issued2001
dc.identifier.citationCurrent Science, vol. 80(10), 1322-1326pp.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/267
dc.description.abstractA dispersed volcanic ash layer was recovered at ~6 300 cm depth in a 5.52 m long sediment core collected at a latitude 9~'21'E from a water depth of 2300 m on the Western Continental Margin of India (WCMI). Glass shards from ash layer were studied for morphology, major, trace and rare earth element concentration to trace the source. Bubble wall junction-type morphology of glass shard suggests magmatic origin. Shards have high SiO2 (77%) and total alkalies (8.5%), indicating rhyolitic composition. The major, trace and rare earth element composition of these glass shards are indistinguishable from that of Youngest Toba ash of ~6 74 ka from the Northern Sumatra and confirm as the source. The new occurrence of Youngest Toba Tuff from the WCMI, Central Indian Ocean Basin and South China Sea Basin suggests a reassessment of the ash volume and global climatic implications.
dc.format.extent173056 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherIndian Academy of Sciences
dc.subjectmarine sediments
dc.subjectIndian Ocean
dc.titleAn occurrence of approx. 74 ka Youngest Toba tephra from the western continental margin of India
dc.typeJournal Article


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