Figure F8. Southern Ocean diatom zonal scheme of Harwood and Maruyama (1992) plotted against the geomagnetic polarity time scale of Berggren et al. (1995b), 0-37 Ma interval. All zonal ages are revised from the Berggren et al. (1985) to the Berggren et al. (1995b) time scale. * = first occurrence, ** = last occurrence, † = first common occurrence, and ‡ = last common occurrence.