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dc.contributor.authorSubrahmanyam, V.
dc.contributor.authorRamana, M.V.
dc.contributor.authorSubbaRaju, L.V.
dc.date.accessioned1997-12-01T10:01:55Z
dc.date.accessioned2017-09-30T01:29:56Z
dc.date.available1997-12-01T10:01:55Z
dc.date.available2017-09-30T01:29:56Z
dc.date.issued1989
dc.identifier.citationJournal of the Geological Society of India, vol.34(2); 1989; 121-132
dc.identifier.issn0016-7622
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7228
dc.description.abstractGeophysical studies of the southwestern continental margin revealed significant surface and subsurface topographic highs (ridges) trending NNW-SSE to NW-Se beyond the shelf break. Residual magnetic anomaly map depicts prominent NNW-SSE, NW-SE and E-W trends. The magnetic anomaly map also reveals three different provinces, A, B and C, based on magnetic signatures, confined to inner shelf, outer shelf and lower shelf. A prominent E-W trending structural lineament with a NW-SE trending offset is observed cutting across the inner shelf and the lower shelf. Model studies of the geopotential data over the topographic rise indicate about 18 km thick mafic basement of continental origin at a shallow depth (~800 m). The gravity model studies indicate a thick consolidated sediment layer deposited over the horst and grabenlike features within the granitic layer. The occurrence of ridges parallel to the shelf edge shows the similarity of the western Indian continental margin with the outer typical and extensively studies passive margins
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.othercontinental margins
dc.subject.othertopography
dc.subject.otherridges
dc.subject.othermagnetic anomalies
dc.subject.othercontinental shelves
dc.subject.othergravity data
dc.subject.othermodels
dc.subject.otherISW, India, Karnataka, Karwar
dc.titleMarine geophysical studies off Karwar, West Coast of India
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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