Figure 2. Late Neogene and Quaternary calcareous nannofossil zonations and supplementary biostratigraphic events as compiled by Young et al. (1994). The events are adopted from Berggren et al. (1995a, 1995b), except for the two events marked with asterisks. The age with single asterisk is a new correlation of Rio et al. (1990) to the magnetostratigraphy of Cande and Kent (1995), and the age with double asterisks is adopted from Takayama (1993).