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dc.contributor.authorGupta, S.M.
dc.date.accessioned1995-07-14T10:01:41Z
dc.date.accessioned2017-09-30T01:29:50Z
dc.date.available1995-07-14T10:01:41Z
dc.date.available2017-09-30T01:29:50Z
dc.date.issued1988
dc.identifier.citationJournal of the Palaeontological Society of India, vol.33; 1988; 59-71
dc.identifier.issn0552-9360
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7083
dc.description.abstractRadiolarian abundance in two Quaternary sediment cores, collected from the Central Indian Basin, was studied and Nigrini's (1971) and Goll's (1980) zones are recognised. New radiolarian zones Collosphaera orthoconus, Lamprocyrtis nigriniae, Lamprocyrtis neopheteroporos and Lamprocyrtis heteroporos are proposed and described to modify Nigrini's and Goll's zonations. A hiatus of 0.2-0.3 M.Y., correspondings to Pseudocubus warrenin zone (Goll, 1980) in core F-88 B, suggest the erosion and redistribution of Pliocene taxa by a bottom water current (probably Antarctic Bottom Water Current). Volcanic ash layers of apparently about 20,000; 30,000 - 40,000; 80,000; 340,000 and younger than 4000,000 years are also recognised, which suggest suboceanic explosive volcanic eruptions during late Quaternary in the area
dc.languageen
dc.publisherPalaeontological Society of India
dc.relation.ispartofJ Palaeontol Soc India
dc.subjectGeology and Geophysics
dc.subject.otherQuaternary
dc.subject.othervolcanic ash
dc.subject.otherecological zonation
dc.subject.otherradiolarian ooze
dc.subject.othercore analysis
dc.subject.othersediments
dc.subject.otherpalaeontology
dc.subject.otherLamprocyrtis warreni
dc.subject.otherLamprocyrtis heteroporos
dc.subject.otherLamprocyrtis neopheteroporos
dc.subject.otherLamprocyrtis nigriniae
dc.subject.otherCollosphaera orthoconus
dc.subject.otherISW, Central Indian Ocean
dc.titleRadiolarian zonation and volcanic ash layers in two Quaternary sediment cores from the Central Indian Ocean Basin
dc.typeJournal Article


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