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dc.contributor.authorKhadge, N.H.
dc.date.accessioned2009-01-12T09:18:24Z
dc.date.available2009-01-12T09:18:24Z
dc.date.issued1997
dc.identifier.citationGeology in South Asia - 2. Proceedings of the Second South Asia Geological Congress (GEOSAS 2), Colombo, Sri Lanka: January 19-24, 1995, Ed. by: Wijayananda, N.P.; Cooray, P.G.; Mosley, P. 191-196p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/2052
dc.description.abstractIn a 7.5 m-long box core, collected at 9 degrees S and 77 degrees E from 5400 m water depth from the Central Indian Basin, geotechnical properties clearly reflect the Plio-Pleistocene boundary. It is marked by a drastic change in the physical properties and clay mineralogy, indicating a sedimentary hiatus or a volcanic ash layer. The shear strength increases from 10 to 13 kPa at this boundary, and despite higher clay and montmorillonite contents, the water content and liquid limit decrease drastically, showing the same values (WC and LL = 94%). These indicate the highly compressed and consolidated nature of this layer, which may be due to overburden pressure of the thick sediment column. Wet-bulk density increases from 1.2 to 1.5 g/cc and porosity decreases from 87 to 71 per cent at this layer. The boundary layer is about 30 cm thick and is devoid of any radiolarian fossils, which may be attributed to either sudden climatic change or to volcanic activity, which precluded preservation of radiolarian fossils
dc.language.isoen
dc.publisherGeological Survey and Mines Bureau, Dehiwala, Sri Lanka
dc.relation.ispartofseriesGeol. Surv. Mines Bureau Sri Lanka Prof. Pap.. 7
dc.rightsCopyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectsediments
dc.subjectsediment properties
dc.subjectphysical properties
dc.subjectdeposition features
dc.subjectgeotechnology
dc.subjectgrain size
dc.subjectshear strength
dc.subjectcores
dc.titlePhysical properties of a long sediment core from the central Indian Basin
dc.typeConference Article


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