georefid:2012-083042SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2012-083042<gco:CharacterString>Cenozoic paleoceanography indicated by size change of calcareous nannofossil and Discoaster abundance</gco:CharacterString>2009-01-01publicationgeorefid:2012-083042Sato, TokiyukiAkita University, Institute of Applied Earth Sciences, Akita, JapanauthorChiyonobu, ShunTohoku University, JapanauthorPalaeontological Society of Japan, [Tokyo], JapanpublisherdocumentHardcopyKaseki = Fossils8612-19We discuss in detail the Cenozoic paleoceanograpy related to the sea surface stratification, nutrient, and sea surface temperature based on the relationship between the coccolith maximum size and Discoaster abundance. The positive correlation was recognized between these parameters in the sequence from Eocene to Pliocene. As Discoaster is likely a lower photic species as like Florisphaera profunda, abundant occurrence of Discoaster indicates the sea surface stratification and the oligotrophic condition. On the basis of the relationship between coccolith maximum size and Discoaster abundance found in the Cenozoic sequence of ODP sites 807 and 731, the intervals of the late Eocene, NN3 to NN4 zones in the early Miocene, and NN6 to NN9 zones in the middle Miocene, are interpreted as the oligotrophic conditions.completedStratigraphyPaleobotanyalgaeArabian SeabiozonesCenozoicCoccolithophoraceaeCoccolithusdeep-sea environmentDiscoasterDiscoasteridaeEoceneEquatorial PacificIndian OceanIntegrated Ocean Drilling ProgramLeg 117Leg 130marine environmentmicrofossilsmiddle MioceneMiocenenannofossilsNeogeneNorth PacificNorthwest PacificOcean Drilling ProgramODP Site 731ODP Site 807Ontong Java PlateauPacific Oceanpaleo-oceanographyPaleogenePlantaePliocenespecies diversityTertiaryWest Pacificurn:org.iodp:exp:117urnlargerWorkCitationcampaignurn:org.iodp:exp:130urnlargerWorkCitationcampaignurn:org.iodp:exp:117:site:731urnlargerWorkCitationstudyurn:org.iodp:exp:117urnlargerWorkCitationcampaignurn:org.iodp:exp:130:site:807urnlargerWorkCitationstudyurn:org.iodp:exp:130urnlargerWorkCitationcampaignJapanesegeoscientificInformation59.4208156.37303.362216.2814