Figure 4.
Comparison of radiometric dates of Caribbean tephra layers and the Neogene
biostratigraphic ages correlated to the Berggren et al. (1995a) time scale. The
black circles show calibration ages used in the Berggren et al. (1995b) age
model. The 40Ar/39Ar ages are shown with 2-
error bars. Data are presented in Table 2. Ma* = ages of magnetic reversals for
Subchron C3n.4n(o) and younger have been calibrated to the astronomical time
scale of Shackleton et al. (1990), Hilgen (1991), Langereis et al. (1994), and
Berggren et al. (1995a).