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doi:10.2204/iodp.proc.303306.202.2009

Results

The original census data of calcareous nannofossils are shown in Table T1. In general, calcareous nannofossils are very abundant in all samples. The assemblages are dominated by E. huxleyi, G. ericsonii, G. muellerae, and G. oceanica. The percent abundance of H. carteri and C. pelagicus is high in some samples. Compared with a composite oxygen isotope curve composed of data from gravity Core GGC-12, piston Core JPC-13, and Site U1304, the downcore variations in relative abundance of each species are more complex (Fig. F1) (oxygen isotope data provided by D.A. Hodell, pers. comm., 2008). The percent abundances of E. huxleyi and G. muellerae are high during marine isotope Stages (MIS) 6, 4, 3, and most of MIS 5 and low during MIS 1, 2, 7, and part of MIS 5. The percent abundance of G. ericsonii and G. oceanica are high during MIS 7 and late MIS 1 but low during MIS 2, 3, 4, and 5. The relative abundances of H. carteri, U. sibogae and C. pelagicus are high in MIS 2, 4, and 7 but low in MIS 3, 6, and most of MIS 5.

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