Calcareous nannofossils across the Cretaceous/Paleocene boundary in the southern Indian Ocean

Changes in the composition of calcareous nannoplankton across the Cretaceous/Paleocene boundary at southern high-latitude Ocean Drilling Program Hole 750A are documented in this semiquantitative study. These changes are compared with changes described from other localities at high- and low-latitudes. This study provides additional data toward a detailed documentation of the paleontologic changes that occurred in the late Maestrichtian and the early Paleocene, despite limitations to the interpretation caused by coring gaps, drilling disturbance, and the presence of an unconformity at the boundary at this site.