georefid:2008-118147SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2008-118147<gco:CharacterString>Neogene oceanographic and climatic changes in the northern Indian Ocean; evidence from Radiolaria</gco:CharacterString>2007-01-01publicationgeorefid:2008-118147Sharma, V.University of Delhi, Department of Geology, Delhi, IndiaauthorDevi, L. BhagyapatiUniversity of Delhi, IndiaauthorCouncil of Scientific & Industrial Research, New Delhi, IndiapublisherdocumentHardcopyIn: Nigam, Rajiv (editor), Saraswat, R. (editor), Marine micropaleontological studies from the northern Indian Ocean36 (4)361-368Neogene is one of the important periods in the earth's history in view of significant changes that took place during the period in climatic and oceanographic conditions. Radiolarians from well preserved cores, uplifted marine sequences, and surface sediments from the northern Indian Ocean provided opportunity to reconstruct the Neogene oceanographic and climatic events. Studies based on radiolarians from land-based sections revealed episodes of cooling and warming in the late Early Miocene to Middle Miocene. Investigations of radiolarian upwelling fauna in the cores from the western Arabian sea demonstrated strengthening and weakening of upwelling during late Middle Miocene to Recent. Examination of radiolarians from surface sediments suggested presence of Antarctic Bottom water in the Mozambique and Madagascar basins of the western Indian Ocean. Certain radiolarian species are found useful in understanding paleomonsoonal changes and have been used to interpret such changes.completedStratigraphyassemblagesbiostratigraphyCenozoicDeep Sea Drilling ProjectDSDP Site 216DSDP Site 237DSDP Site 238Indian OceanInvertebrataLeg 115Leg 121Leg 22Leg 24marine environmentmicrofossilsmonsoonsNeogeneOcean Drilling ProgramODP Site 709ODP Site 758paleo-oceanographypaleoclimatologypaleoenvironmentpaleotemperatureProtistaRadiolariaTertiaryupwellingurn:org.iodp:exp:115urnlargerWorkCitationcampaignurn:org.iodp:exp:121urnlargerWorkCitationcampaignurn:org.iodp:exp:22urnlargerWorkCitationcampaignurn:org.iodp:exp:24urnlargerWorkCitationcampaignurn:org.iodp:exp:22:site:216urnlargerWorkCitationstudyurn:org.iodp:exp:22urnlargerWorkCitationcampaignurn:org.iodp:exp:24:site:237urnlargerWorkCitationstudyurn:org.iodp:exp:24urnlargerWorkCitationcampaignurn:org.iodp:exp:24:site:238urnlargerWorkCitationstudyurn:org.iodp:exp:24urnlargerWorkCitationcampaignurn:org.iodp:exp:115:site:709urnlargerWorkCitationstudyurn:org.iodp:exp:115urnlargerWorkCitationcampaignurn:org.iodp:exp:121:site:758urnlargerWorkCitationstudyurn:org.iodp:exp:121urnlargerWorkCitationcampaignEnglishgeoscientificInformation58.072890.2141-7.05005.2303