Figure F5. Correlation of benthic delta18O signal at Site 1090 in the late Oligocene and early Miocene with the astronomically tuned delta18O record from Site 929 on the Ceara Rise (after Billups et al., 2002). This correlation can be used to directly relate the astronomically tuned Site 929 chronology to the polarity reversal stratigraphy at Site 1090 (Channell et al., in press). CM-O/M = carbon isotope maximum at the Oligocene/Miocene boundary (Hodell and Woodruff, 1994). Mi 1 and Mi 1a represent Miocene glacial events (Miller et al., 1991).

Figure F5. Correlation of benthic

¹⁸O signal at Site 1090 in the late Oligocene and early Miocene with the astronomically tuned

¹⁸O record from Site 929 on the Ceara Rise (after Billups et al., 2002). This correlation can be used to directly relate the astronomically tuned Site 929 chronology to the polarity reversal stratigraphy at Site 1090 (Channell et al., in press). CM-O/M = carbon isotope maximum at the Oligocene/Miocene boundary (Hodell and Woodruff, 1994). Mi 1 and Mi 1a represent Miocene glacial events (Miller et al., 1991).