Upwelling along the western Indian continental margin and its geological record - a summary

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dc.contributor.author Setty, M.G.A.P.
dc.contributor.editor Thiede, J.
dc.contributor.editor Suess, E.
dc.date.accessioned 1995-05-16T10:00:59Z
dc.date.accessioned 2017-09-29T13:48:38Z
dc.date.available 1995-05-16T10:00:59Z
dc.date.available 2017-09-29T13:48:38Z
dc.date.issued 1983
dc.identifier.citation Coastal Upwelling: its sediment record. Part B. Sedimentary records of ancient coastal upwelling; 1983; 201-216
dc.identifier.uri http://drs.nio.org/drs/handle/2264/6581
dc.description.abstract Upwelling along the western Indian continental margin is recorded each year from Cape Comorin to Cochin and further north up to Goa from June to September during the southwest monsoon. During this upwelling heavy phytoplankton blooms develop which contribute to the sediment compositions along the western continental margin. Here, under the influence of coastal upwelling and the resulting intense midwater oxygen minimum, a belt of laminated dark organic-carbon-rich muds is deposited along the upper slope. These laminations are believed to represent the response of the depositional environment to the annually recurring upwelling events. Distributions of organic carbon, opaline silica, benthic and planktonic faunas, and the preservation of biogenic sediment components can be correlated to the characteristics of the water masses and, thereby, to the intensity and magnitude of upwelling. Benthic and planktonic foraminifers are particularly useful indicators; e.g., the invasion of immigrant populations of @iGlobigerina bulloides@@, and of dextrally coiled @iNeogloboquadrina pachyderma typica@@ through upwelling leave a record of the presence of such water masses in the sediments of that region. The very occurrence of @iG. bulloides@@ and the absence or irregular occurrence of @iGloborotalia menardii@@ also imply upwelling in that region, as does the presence of benthic foraminifers @iHyalinea balthica@@ and @iEhrenbergina@@ sp.
dc.language en
dc.publisher New York: Plenum
dc.relation.ispartofseries NATO Conference Series IV. Marine Science, vol.10B
dc.relation.isbasedon 2nd Half of the NATO Advanced Research Institute on Coastal Upwelling and its Sediment Record, Vilamoura, Portugal; 1-4 Sep 1981
dc.relation.isreferencedby NON-SCI
dc.subject Fisheries
dc.subject Oceanography and Limnology
dc.subject.other Continental Margins
dc.subject.other Upwelling
dc.subject.other Plankton
dc.subject.other Zooplankton
dc.subject.other Sediment Composition
dc.subject.other ISW, India
dc.subject.other Foraminifera
dc.title Upwelling along the western Indian continental margin and its geological record - a summary
dc.type Book Chapter
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


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