{"NOAAStudyId":"12583","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2012-02-23","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-12583.xml","doi":null,"earliestYearBP":55000000,"earliestYearCE":-54998050,"entryId":"noaa-ocean-12583","funding":[],"investigators":"Shamrock, J.L.; Watkins, D.K.","mostRecentYearBP":35000000,"mostRecentYearCE":-34998050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/12583","originalSource":null,"publication":[{"abstract":"A relatively complete section of Eocene (~33.9-55.8 Ma) pelagic \r\nchalk from offshore northwestern Australia was used to analyze \r\nrange and abundance data of ~250 Eocene species to test the \r\nefficacy of the existing CP (Okada and Bukry 1980) and NP \r\n(Martini 1971) biostratigraphic zonation schemes. \r\nChanges in nannofossil diversity, abundance, and community \r\nstructure were monitored through several Eocene paleoenvironmental \r\nevents, as identified by changes in d13C and d18O data, to examine \r\nvariations in surface water conditions. Major changes in nannofossil \r\nassemblages, as indicated by dominance crossovers, correspond to \r\npaleoenvironmental shifts such as the PETM (Paleocene-Eocene thermal \r\nmaximum) and the EECO (Early Eocene climatic optimum). This research \r\nalso provides systematic paleontology and range data for one new \r\ngenus (Hexadelus) and eight new species or variants (Calcidiscus \r\nellipticus, Cruciplacolithus nebulosus, Cruciplacolithus opacus, \r\nCyclicargolithus parvus, Hexadelus archus, Hayella situliformis \r\nvar. ovata, Markalius latus, Pedinocyclus annulus) and addresses \r\nseveral taxonomic issues in other Eocene species. \r\n","author":null,"citation":"Shamrock, J.L. and D.K. Watkins. 2012. \r\nEocene calcareous nannofossil biostratigraphy and community structure \r\nfrom Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). \r\nStratigraphy, Vol. 9, no. 1.\r\n","edition":null,"identifier":null,"issue":null,"journal":"Stratigraphy","pages":null,"pubRank":"1","pubYear":2012,"reportNumber":null,"title":"Eocene calcareous nannofossil biostratigraphy and community structure  from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762)","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"52340","geo":{"geoType":"Feature","geometry":{"coordinates":["-19.8869","112.2539"],"type":"POINT"},"properties":{"easternmostLongitude":"112.2539","maxElevationMeters":"-1360","minElevationMeters":"-1360","northernmostLatitude":"-19.8869","southernmostLatitude":"-19.8869","westernmostLongitude":"112.2539"}},"locationName":"Ocean>Indian Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"20916","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>population abundance"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/shamrock2012/shamrock2012.txt","linkText":"shamrock2012.txt","urlDescription":"Original Data and Full Metadata","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>paleocean>population abundance"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/shamrock2012/shamrock2012.xls","linkText":"shamrock2012.xls","urlDescription":"Original Data and Full Metadata","variables":[]}],"dataTableName":"ODP762-2012","dataTableNotes":null,"earliestYear":55000000,"earliestYearBP":55000000,"earliestYearCE":-54998050,"mostRecentYear":35000000,"mostRecentYearBP":35000000,"mostRecentYearCE":-34998050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP762"}],"studyCode":null,"studyName":"Eastern Indian Ocean ODP762 Eocene Calcareous Nannofossil Data ","studyNotes":"Raw Eocene calcareous nannofossil abundance data from ODP Leg 122, \nSite 762, Eastern Indian Ocean. Data are raw nannofossil counts from \n184.49-422.00 msbf (Core 3-4-49cm to 29-1-50cm). Assemblage data \nwas collected by first identifying 500 specimens to species level, \nexcept members of Pontosphaeraceae and Syracosphaeraceae, \nwhich were rare and sporadic through the section. Additionally, \ntwo long traverses were examined to identify rare specimens, \nwhich were given a value of 1 and added to the total. \nThis data was used to convert all species and genera to percent \nabundance for further analysis. \n\nDetailed site information can be found in Shamrock and Watkins (2012), \nor from Leg 122 Initial Reports (Haq et al. 1990) and Scientific Results \n(Rad et al. 1992). The vast majority of original taxonomic references \ncan be found in Perch-Nielsen (1985) and Bown (1998). \nSamples were supplied by the International Ocean Drilling Program (IODP). \n\n","version":"1.0","xmlId":"10626"}