<gco:CharacterString>Mise en place de la circulation au Pacifique central equatorial et des assemblages des nannofossiles calcaires au Neogene (Leg DSDP 85); II, Influence de l'emersion de l'isthme de Panama, entre 7 et 2 Ma Establishment of Equatorial Pacific water circulation and of calcareous nannofossil assemblages during the Neogene (DSDP Leg 85); II, The uplift of the Isthmus of Panama and its consequences between 7 and 2 Ma</gco:CharacterString>

georefid:2012-069644SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2012-069644<gco:CharacterString>Mise en place de la circulation au Pacifique central equatorial et des assemblages des nannofossiles calcaires au Neogene (Leg DSDP 85); II, Influence de l'emersion de l'isthme de Panama, entre 7 et 2 Ma Establishment of Equatorial Pacific water circulation and of calcareous nannofossil assemblages during the Neogene (DSDP Leg 85); II, The uplift of the Isthmus of Panama and its consequences between 7 and 2 Ma</gco:CharacterString>1987-01-01publicationgeorefid:2012-069644Pujos, AnnickUniversite de Bordeaux I, Departement Geologie Oceanographie, Talence, FranceauthorSociete Geologique de France, Paris, FrancepublisherdocumentHardcopyBulletin de la Societe Geologique de France3 (4)731-736Four sites were drilled during DSDP Leg 85 in the equatorial Pacific. Calcareous nannofossils from Mio-Pliocene sediments recovered from the central and eastern parts of the high-productivity area were studied in detail. Two main geologic events occurred during the Neogene which modified the water masses circulation in the Pacific Ocean: (1) between 15 and 7 Ma, Antarctic glaciation influenced greatly the Pacific circulation (first part of the study); (2) between 7 and 2 Ma, the progressive uplift of the isthmus of Panama gave rise to a tropical and an equatorial upwelling, which changed the distribution of discoasters and Coccolithus pelagicus, and triggered off the recent Pacific circulation.completedStratigraphyalgaeassemblagesbiostratigraphycalcareous compositionCenozoicCentral AmericaDeep Sea Drilling ProjectEast PacificEquatorial PacificIPODLeg 85microfossilsnannofossilsNeogeneNorth PacificNortheast Pacificocean circulationPacific OceanpaleoenvironmentPanamaPlantaereconstructionTertiaryupliftsurn:org.iodp:exp:85urnlargerWorkCitationcampaignFrenchgeoscientificInformation-133.2010-113.50300.29545.5100