Middle miocene to pleistocene planktonic foraminiferal biostratigraphy in the eastern equatorial Pacific Ocean

Hiroki Hayashi, Kyoko Idemitsu, Bridget S. Wade, Yuki Idehara, Katsunori Kimoto, Hiroshi Nishi, Hiroki Matsui

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We present a detailed dataset of planktonic foraminiferal biohorizons to enhance a biostratigraphy for the eastern equatorial Pacific. Middle Miocene to Pleistocene planktonic foraminiferal biostratigraphy is established using 269 samples from Cores 1H to 40H recovered from Integrated Ocean Drilling Program (IODP) Hole U1338B. In addition to the onboard study of Hole U1338A, a total of 60 biohorizons are recognized with three grades of reliability. Generally, these biohorizons are in agreement with each other and consistent with shipboard magnetostratigraphy, except for several discrepancies that may be caused by ecological diachronous processes. The studied sequence can be correlated with Zone M7 to Subzone PT1b. However, we cannot detect Miocene zones M6, M10, and M12 in this sequence because of discrepancies in some zonal marker biohorizons.

Original languageEnglish
Pages (from-to)91-109
Number of pages19
JournalPaleontological Research
Volume17
Issue number1
DOIs
Publication statusPublished - 2013 Apr

Keywords

  • IODP Exp 321
  • Middle Miocene to Pleistocene
  • biostratigraphy
  • equatorial Pacific
  • planktonic foraminifera

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology

Fingerprint

Dive into the research topics of 'Middle miocene to pleistocene planktonic foraminiferal biostratigraphy in the eastern equatorial Pacific Ocean'. Together they form a unique fingerprint.

Cite this