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dc.contributor.authorSiddiquie, H.N.
dc.contributor.authorSukheswala, R.N.
dc.date.accessioned1997-11-26T09:56:51Z
dc.date.accessioned2017-09-29T13:47:05Z
dc.date.available1997-11-26T09:56:51Z
dc.date.available2017-09-29T13:47:05Z
dc.date.issued1976
dc.identifier.citationJournal of the Geological Society of India, vol.17(4); 1976; 539-546
dc.identifier.issn0016-7622
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/5516
dc.description.abstractA study of thin sections from the lower and middle parts of Unit 5 (Paleocene) from Site 219 shows that these largely consist of acidic or rhyolitic tuffs. The overlying limestones in Unit 5 (Paleocene) and Unit 4 (Lower Eocene) also contain tuffaceous material in varying proportions. Albite/oligoclase forms the phenocrysts as also needles in the groundmass of these tuffs and tuffaceous material in limestones. The euhedral fresh felspars suggest that the source of activity was nearby and possibly most of the activity was subaqueous rather than subaerial. Similar acidic tuffs in the Deccan Traps have been reported particularly from the West Coast of India. The acidic tuffs at site 219 are of the same age as the Deccan Traps and may represent a late phase of Deccan Trap activity on the Laccadive Ridge before its subsidence and separation from peninwular India
dc.languageen
dc.publisherGeological Society of India
dc.relation.ispartofJ Geol Soc India
dc.relation.isreferencedbySCI
dc.subjectGeology and Geophysics
dc.subjectGeology and Geophysics
dc.subject.otherdeep sea drilling
dc.subject.otherpetrology
dc.subject.othermineralogy
dc.subject.othertexture
dc.subject.otherpalaeo studies
dc.subject.otherISW, Laccadive
dc.titleOccurrence of rhyolytic tuffs at deep sea drilling project site 219 on the Laccadive Ridge
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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