Influence of estuaries on shelf sediment texture

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dc.contributor.author Nair, R.R.
dc.contributor.author Hashimi, N.H.
dc.date.accessioned 1995-06-11T10:01:18Z
dc.date.accessioned 2017-09-29T13:48:19Z
dc.date.available 1995-06-11T10:01:18Z
dc.date.available 2017-09-29T13:48:19Z
dc.date.issued 1986
dc.identifier.citation Journal of Coastal Research, vol.2; 1986; 199-203
dc.identifier.issn 0749-0208
dc.identifier.uri http://drs.nio.org/drs/handle/2264/6209
dc.description.abstract Granulometric analyses of sediments on the western continental shelf of India demonstrate that the texture of inner continental shelf sediments (10 to 60 m water depth) appears to be determined by the size and number of estuaries present on the coast. Offshore from regions where there are a large number of estuaries, the inner shelf sediments are fine grained (average mean size 5.02 phi, 0.03 mm), rich in organic matter ( 2%) and low in calcium carbonate ( 25%). In contrast, in regions with relatively fewer estuaries, the shelf sediments are of sand size (average mean size 1.53 phi, 0.35 mm), poor in organic matter ( 1%) and rich in calcium carbonate ( 30%). Echo profiles of the sea floor are characterized by sub-bottom reflections in the former and their absence in the latter. These differences are attributed to the fact that the estuaries act as regional filters which permit deposition of only fine-grained sediments on the inner shelf while trapping the coarse-grained material in the estuarine basin. An example of this filtering effect is discussed from the sediment texture distribution on the south-western shelf of India (Kerala) where it is particularly well displayed
dc.language en
dc.publisher Tirunelveli: JCSONLINE
dc.relation.ispartof J Coastal Res
dc.relation.isreferencedby SCI
dc.subject Geology and Geophysics
dc.subject.other calcium carbonates
dc.subject.other organic matter
dc.subject.other organic matter
dc.subject.other sediments
dc.subject.other granulometry
dc.subject.other sediment texture
dc.subject.other continental shelves
dc.subject.other estuaries
dc.subject.other ISW, India, Kerala
dc.title Influence of estuaries on shelf sediment texture
dc.type Journal Article
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


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