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Shipboard calcareous nannofossil biostratigraphic and magnetostratigraphic data were acquired from all three holes at Site U1338 (see Tables T4 and T15 in the “Site U1338” chapter [Expedition 320/321 Scientists, 2010b]). Ciummelli (2013) provided additional higher resolution calcareous nannofossil biostratigraphic data for the late middle through earliest Pliocene interval that were partly published by Backman et al. (2013). Baldauf (2013) provided higher resolution diatom biostratigraphic data. See above references for methods of data acquisition. Age estimates and nomenclatures for geomagnetic chron boundaries follow the timescale of Lourens et al. (2004). Age estimates for equatorial Pacific diatom biohorizons were synthesized by Barron (1992) and are here converted from the timescale by Berggren et al. (1985) to that by Lourens et al. (2004). Age estimates for calcareous nannofossils mainly represent astronomically tuned calibrations from the western equatorial Atlantic (Backman et al., 2012).