Planktonic Foraminifera DSDP Leg 34—Nazca Plate

Abstract

This paper details the occurrence of planktonic foraminifera from Sites 319, 320, and 321, recovered from Leg 34 of the DSDP-the Nazca Plate leg. In addition, the report includes discussion of the planktonic foraminifera from two piston cores (DWBP 134 and AMPH 30P) also from the Nazca Plate, both close to the East Pacific Rise and at a latitude close to that (9°-13°S) drilled on the Nazca Plate during the operation of Leg 34. Foraminifera and sediments from the piston cores are Quaternary. Sediments containing foraminifera are at Site 319, early Miocene (N8) to late Miocene or Pliocene (NI8/19); at Site 320, Oligocene (N2), early Miocene (N4-N8) and Quaternary, and at Site 321 late Eocene (P16) to Oligocene (N2/3). At each DSDP site, records are made of residue percentage, small planktonic percentage (both defined herein), planktonic percentage, planktonic diversity and age. The following species are described as new: Globorotalia (Tur-borotalia) akersi, G (T.) bauerensis and Clavigerinella nazcaensis.