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dc.contributor.authorRao, Ch.M.
dc.contributor.authorMurty, P.S.N.
dc.date.accessioned1993-12-05T09:56:26Z
dc.date.accessioned2017-09-29T13:47:25Z
dc.date.available1993-12-05T09:56:26Z
dc.date.available2017-09-29T13:47:25Z
dc.date.issued1968
dc.identifier.citationBulletin of National Institute of Sciences of India, vol.38; 1968; 442-448
dc.identifier.issn0027-9528
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/5986
dc.description.abstractSediment samples collected from the shelf and slope regions along two sections normal to the coast off Madras and Karaikal and from a few stations in between have been studied for their grain size, coarse fraction constituents and calcium carbonate content. Grain size study has shown that the sediments off Madras are mainly sandy in nature and vary from fine to very fine sands in the nearshore and outer shelf regions to medium to coarse sands in the midshelf region. Off Karaikal they vary from coarse sands in the nearshore region to fine sands and silts in the outer shelf and slope regions. Coarse fraction studies have revealed among other things the occurrence of oolites in association with shallow water benthic foraminifera like Rotalia beccarii etc., in sediments beyond 30 fathoms depth, from which it was deduced that these sediments might have been laid down when the sea level was relatively lower than the present day level and were not covered by the present day deposition of terrigenous sediments. The calcium carbonate content increases progressively with depth along these two sections and varies from 1.75% to 37% off Madras and from 6% to 54% off Karaikal
dc.languageen
dc.publisherNational Institute of Sciences of India
dc.relation.ispartofB Natl Inst Sci India
dc.subjectGeology and Geophysics
dc.subject.othercalcium carbonates
dc.subject.othergrain size
dc.subject.othershelf geology
dc.subject.othersediments
dc.subject.otherISW, India, Tamil Nadu, Madras
dc.titleStudies on the shelf sediments off the Madras coast
dc.typeJournal Article


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