Figure F2. Summary of the Neogene chronostratigraphy adopted for Leg 178 studies. Geomagnetic polarity timescale is after Cande and Kent (1995). Sources for calibration of each zonation: 1 = Berggren et al., 1995, 2 = Cande and Kent, 1995, 3 = Harwood and Maruyama, 1992; Winter and Iwai, Chap. 29, this volume; Iwai, 2001, unpubl. data, 4 = Lazarus, 1992, 5 = Okada and Bukry, 1980, 6 = Martini, 1971, 7 = Berggren, 1992.