Figure F5. Quaternary through Paleocene chronostratigraphic units correlated with planktonic foraminifer and calcareous nannofossil zonations and with the geomagnetic polarity time scale. Time scales are from Berggren et al. (1995a). Zonations are those of (1) Berggren et al. (1995a), (2) Blow (1969), (3) Jenkins (1985, 1993) (see Fig. F7), (4) Martini (1971), and (5) Okada and Bukry (1980).