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Data report: calcareous nannofossils from the middle Miocene to Pleistocene, IODP Expedition 370 Site C0023

, Expedition 370 Scientists

Proceedings of the International Ocean Discovery Program

International Ocean Discovery Program

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      Abstract

      International Ocean Discovery Program Expedition 370 recovered marine subsurface sediments from 189 to 1126 meters below seafloor (mbsf) at Site C0023, which was established on the Nankai Trough, off Muroto Peninsula, Japan. Biostratigraphic studies based on calcareous nannofossil assemblages revealed the ages of sediments are from the middle Miocene to Pleistocene. Samples from 1126.885 to 796.530 mbsf yielded Miocene taxa such as Coccolithus miopelagicus, Cyclicargolithus floridanus, Catinaster calyculus, and Discoaster quinqueramus. The interval 790.285–774.984 mbsf spans the late Miocene to the early Pliocene, as it corresponds to bioevents spanning from the last occurrence (LO) of D. quinqueramus to the first occurrence of Ceratolithus cristatus. Samples from 769.440 to 639.982 mbsf are referred to the Pliocene based on occurrences of C. cristatus, Reticulofenestra pseudoumbilicus (≥7 µm), and/or Discoaster surculus. Sediments from 630.440 to 190.483 mbsf are dated to the Pleistocene, as an interval above the LO of Discoaster pentaradiatus. Preservation of calcareous nannofossils is poor or moderate in the middle Miocene samples and moderate to good in the samples from the upper Miocene to Pleistocene.

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      Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphic zonation (Bukry, 1973; 1975)

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        A review of calcareous nannofossil astrobiochronology encompassing the past 25 million years☆

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          Biozonation and biochronology of Miocene through Pleistocene calcareous nannofossils from low and middle latitudes

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            Author and article information

            Journal
            10.14379/iodp.proc.370.2017
            Proceedings of the International Ocean Discovery Program
            International Ocean Discovery Program
            2377-3189
            18 April 2018
            10.14379/iodp.proc.370.201.2018

            This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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            Self URI (journal page): http://publications.iodp.org/

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