noaa-ocean-12583 Eastern Indian Ocean ODP762 Eocene Calcareous Nannofossil Data Shamrock, J.L.; Watkins, D.K. Eastern Indian Ocean ODP762 Eocene Calcareous Nannofossil Data 2012-02-23 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/12583 Investigator J.L. Shamrock Investigator D.K. Watkins earth science paleoclimate paleocean population abundance geoscientificInformation 55000000 cal yr BP 35000000 cal yr BP Complete -19.8869 -19.8869 112.2539 112.2539 -1360 -1360 Ocean Indian Ocean ODP762>LATITUDE -19.8869>LONGITUDE 112.2539 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Shamrock, J.L. and D.K. Watkins. 2012. Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy, Vol. 9, no. 1.

A relatively complete section of Eocene (~33.9-55.8 Ma) pelagic chalk from offshore northwestern Australia was used to analyze range and abundance data of ~250 Eocene species to test the efficacy of the existing CP (Okada and Bukry 1980) and NP (Martini 1971) biostratigraphic zonation schemes. Changes in nannofossil diversity, abundance, and community structure were monitored through several Eocene paleoenvironmental events, as identified by changes in d13C and d18O data, to examine variations in surface water conditions. Major changes in nannofossil assemblages, as indicated by dominance crossovers, correspond to paleoenvironmental shifts such as the PETM (Paleocene-Eocene thermal maximum) and the EECO (Early Eocene climatic optimum). This research also provides systematic paleontology and range data for one new genus (Hexadelus) and eight new species or variants (Calcidiscus ellipticus, Cruciplacolithus nebulosus, Cruciplacolithus opacus, Cyclicargolithus parvus, Hexadelus archus, Hayella situliformis var. ovata, Markalius latus, Pedinocyclus annulus) and addresses several taxonomic issues in other Eocene species. STUDY NOTES: Raw Eocene calcareous nannofossil abundance data from ODP Leg 122, Site 762, Eastern Indian Ocean. Data are raw nannofossil counts from 184.49-422.00 msbf (Core 3-4-49cm to 29-1-50cm). Assemblage data was collected by first identifying 500 specimens to species level, except members of Pontosphaeraceae and Syracosphaeraceae, which were rare and sporadic through the section. Additionally, two long traverses were examined to identify rare specimens, which were given a value of 1 and added to the total. This data was used to convert all species and genera to percent abundance for further analysis. Detailed site information can be found in Shamrock and Watkins (2012), or from Leg 122 Initial Reports (Haq et al. 1990) and Scientific Results (Rad et al. 1992). The vast majority of original taxonomic references can be found in Perch-Nielsen (1985) and Bown (1998). Samples were supplied by the International Ocean Drilling Program (IODP).

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/shamrock2012/shamrock2012.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/shamrock2012/shamrock2012.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11