In this study we identified a total of 11 calcareous nannofossil events at five ODP sites in the tropical and equatorial Pacific (Table T3). Although we discussed assigned ages for these events, as well as the degree of diachronity at different latitudes and oceans, we do not provide a final calibration of these events in the region. This paper constitutes a first attempt; in the future, when paleomagnetic and isotope stratigraphies become refined, they will be compared against these results.