Proc. IODP, 303/306, Data report: Pliocene–Pleistocene planktonic foraminifer bioevents at IODP Site U1313

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Chapter contents Abstract Introduction Methods Results and discussion Early Pliocene events Late Pliocene–early Pleistocene events Astronomical age of bioevents FO of Globorotalia puncticulata LO of Globorotalia margaritae Disappearance of Globorotalia puncticulata Reappearance of Globorotalia puncticulata LO of Globorotalia puncticulata FAO of Globorotalia inflata FAO of Neogloboquadrina pachyderma sinistral Reduction of Neogloboquadrina pachyderma sinistral Increase of Neogloboquadrina pachyderma sinistral FO of Globorotalia truncatulinoides Conclusions Acknowledgments References Figures F1. Abundance vs. depth. F2. Ratio vs. depth. F3. Bioevents. Table T1. Quantitative data. PDF file			Previous \| Next doi:10.2204/iodp.proc.303306.205.2009 Data report: Pliocene–Pleistocene planktonic foraminifer bioevents at IODP Site U1313¹ F.J. Sierro,² I. Hernandez-Almeida,² M. Alonso-Garcia,² and J.A. Flores² Abstract We performed a quantitative study of some planktonic foraminifer species from Integrated Ocean Drilling Program Site U1313 to define main biostratigraphic events. Some of these events were characterized by large changes in species abundance rather than their first or last occurrences. Changes in relative abundances of planktonic foraminifers were compared to the color reflectance and magnetostratigraphic records measured at this site. We obtained astronomical ages for all these events through calibration to the isotope timescale. Comparison of these ages with the astronomical dates derived from the Mediterranean indicates that most of the events were synchronous in the mid-latitudes of the North Atlantic and the Mediterranean. ¹ Sierro, F.J., Hernandez-Almeida, I., Alonso-Garcia, M., and Flores, J.A., 2009. Data report: Pliocene–Pleistocene planktonic foraminifer bioevents at IODP Site U1313. In Channell, J.E.T., Kanamatsu, T., Sato, T., Stein, R., Alvarez Zarikian, C.A., Malone, M.J., and the Expedition 303/306 Scientists, Proc. IODP, 303/306: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.303306.205.2009 ² Department of Geology, Group of Oceanic Geosciences, Faculty of Sciences, University of Salamanca, 37008 Salamanca, Spain. Correspondence author: sierro@usal.es Initial receipt: 9 May 2008 Acceptance: 2 October 2008 Publication: 26 January 2009 MS 303306-205 Top of page \| Previous \| Next