Table 6.

Stratigraphic ranges of key Oligocene diatom marker species in Hole 647A

CoreTypeSectionInterval Top (cm)Interval Bottom (cm)Depth (mbsf)Rhizosolenia oligocaenicaSynedra jouseanaSceptroneis pupa
15R1125127136.65R
15R2124126138.14R
15RCC139.62R
16R14951145.59R
18R15052164.60RR
18RCC166.52R
19R5124126181.04R
20R14850183.98R
20R35254187.02RR
20R55052190.00R
20RCC191.49R
21R1124126194.34R
21R2124126195.84R
21R3124126197.34R
23RCC221.82R
24R28385224.23R
24R48688227.26R
24RCC227.50R
26RCC242.33R
  • Taxonomy follows Baldauf & Monjanel (1989).

  • Bold represents biostratigraphic datum.