dc.contributor.author | Pattan, J.N. | |
dc.contributor.author | Shane, P. | |
dc.contributor.author | Pearce, N.J.G. | |
dc.contributor.author | Banakar, V.K. | |
dc.contributor.author | Parthiban, G. | |
dc.date.accessioned | 2006-08-26T15:15:27Z | |
dc.date.available | 2006-08-26T15:15:27Z | |
dc.date.issued | 2001 | |
dc.identifier.citation | Current Science, vol. 80(10), 1322-1326pp. | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/267 | |
dc.description.abstract | A 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.extent | 173056 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.publisher | Indian Academy of Sciences | |
dc.subject | marine sediments | |
dc.subject | Indian Ocean | |
dc.title | An occurrence of approx. 74 ka Youngest Toba tephra from the western continental margin of India | |
dc.type | Journal Article | |