georefid:2000-054086SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2000-054086<gco:CharacterString>Pliocene-Pleistocene planktonic Foraminifera from the ODP Leg 170 Hole 1039B in the Middle American Trench off Costa Rica</gco:CharacterString>2000-01-01publicationgeorefid:2000-054086Ibaraki, MasakoShizuoka University, Department of Biology and Geosciences, Shizuoka, JapanauthorShizuoka Daigaku Rigakubu, Shizuoka, JapanpublisherdocumentHardcopyReports of Faculty of Science, Shizuoka University3437-58The drill site of Hole 1039B is located on the bottom of the Middle American Trench off Costa Rica. Biostratigraphic analyses by means of planktonic Foraminifera are made on 148 samples in total from Cores 170-1039B-1H through 18X of about 160 meters in thickness. These sediments are included in Zones N19 through N23, the Pliocene to Pleistocene in age. Occurrences of planktonic Foraminifera are rare in Zones N19 and N21, although those are common in Zones N22 and N23. A temporal decrease of warm-water dwellers is recognized at ca. 4Ma in Zone N19, suggesting an influence of the closing of the Central American Seaway.completedStratigraphybiostratigraphyCenozoicCentral AmericaCosta RicaEast PacificForaminiferaInvertebrataLeg 170microfossilsMiddle America TrenchNeogeneNorth PacificNortheast PacificOcean Drilling ProgramODP Site 1039Pacific Oceanpaleo-oceanographyplanktonic taxaPleistocenePlioceneProtistaQuaternaryTertiaryurn:org.iodp:exp:170urnlargerWorkCitationcampaignurn:org.iodp:exp:170:site:1039urnlargerWorkCitationstudyurn:org.iodp:exp:170urnlargerWorkCitationcampaignEnglishgeoscientificInformation-86.1200-86.12009.38239.3823