Samples of approximately 20-cm3 volume were processed on board the ship and in shore-based laboratories. Processing included soaking in a Calgon solution and washing through a 63-µm sieve. Shipboard processing dried the samples under a heat lamp, whereas the shore-based processing dried the samples overnight in an oven at 50°C. More indurated sediments required light crushing and agitation in a heated Calgon solution. The >150-µm fraction was examined for planktonic foraminifers. In rare instances, the 63- to 150-µm fraction was studied for zonal markers if the markers were absent from the larger size fraction. The zonal scheme of Blow (1969), with slight modifications by Kennett and Srinivisan (1983) and Curry, Shackleton, Ritcher, et al. (1995), was used to subdivide the Neogene into planktonic foraminiferal zones. Age estimates for Cenozoic datum levels are taken from Berggren et al. (1995a, 1995b), except for the first occurrence (FO) of Globigerinoides conglobatus at 6.2 m.y. (Chaisson and Pearson, 1997) (Table 1).