Proc. IODP, 303/306, Data report: Quaternary calcareous nannofossil datums and biochronology in the North Atlantic Ocean, IODP Site U1308

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Chapter contents Abstract Introduction Samples and methods Results Remarks on stratigraphic position of datums Datum 8: last occurrence of Gephyrocapsa spp. (large) Datum 5: last occurrence of Reticulofenestra asanoi Datums 2 and 3: first occurrence of Emiliania huxleyi and last occurrence of Pseudoemiliania lacunosa Conclusion Acknowledgments References Figures F1. Site map. F2. Marker species. F3. Datum events. F4. Oxygen isotope stratigraphy. Table T1. Datum ages. PDF file			Previous \| Next doi:10.2204/iodp.proc.303306.210.2009 Data report: Quaternary calcareous nannofossil datums and biochronology in the North Atlantic Ocean, IODP Site U1308¹ Tokiyuki Sato,² Shun Chiyonobu,³ and David A. Hodell⁴ Abstract We studied high-resolution Quaternary calcareous nannofossil biostratigraphy to clarify the relationship between nannofossil events and oxygen isotope stratigraphy using the continuous sediment sequence from Integrated Ocean Drilling Program Site U1308 in the North Atlantic Ocean. Results indicate that some nannofossil events found in the section, such as the last occurrences of Reticulofenestra asanoi and Gephyrocapsa spp. (large), are located in a different stratigraphic position compared to previous studies. We also clarify the critical stratigraphic positions of both the first occurrence of Emiliania huxleyi and the last occurrence of Pseudoemiliania lacunosa, which occur just below the highest peaks of each marine isotope Stage 8 and 12. ¹ Sato, T., Chinyonobu, S., and Hodell, D.A., 2009. Data report: Quaternary calcareous nannofossil datums and biochronology in the North Atlantic Ocean, IODP Site U1308. 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.303306.210.2009 ² Institute of Applied Earth Sciences, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegata-gakuencho, Akita 010-8502, Japan. toki@keigo.mine.akita-u.ac.jp ³ Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Aramaki-Aoba, Sendai 980-8578, Japan. ⁴ Department of Geological Sciences, University of Florida, 214 Williams Hall, PO Box 112120, Gainesville FL 32611, USA. Initial receipt: 29 September 2008 Acceptance: 10 September 2009 Publication: 25 November 2009 MS 303306-210 Top of page \| Previous \| Next