Notes on Neogene calcareous nannofossil biostratigraphy of the Ontong Java Plateau and size variations of Reticulofenestra coccoliths

Abstract

A total of 35 calcareous nannofossil datums were found in the Neogene sediments recovered at five sites (Sites 803-807) on the Ontong Java Plateau in the eqautorial Pacific during Ocean Drilling Program Leg 130. Among them, 12 datums in the Pleistocene-upper Pliocene sequences were correlated with magnetostratigraphy. Pliocene and Miocene calcareous nannofossil assemblages in 289 samples obtained from Holes 804C, 805B, 805C, and 806B were studied. Reticulofenestra coccolith size distribution patterns in these Pliocene-Miocene sediments were also revealed through the present investigation. -Author