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Ikeda, Akihiro; Koizumi, Itaru (2000): Diatom abundance in sediments from ODP Leg 167 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.793436, Supplement to: Ikeda, A; Koizumi, I (2000): Data Report: Diatom flora of the northern California margin since 3 Ma. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-7, https://doi.org/10.2973/odp.proc.sr.167.231.2000

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Abstract:
The Pliocene and Pleistocene periods are known for the onset and consequent amplification of glacial-interglacial cycles. The California margin, situated in the mid-latitudes of the northern Pacific Ocean, is expected to be one of the most interesting regions for Pliocene to Pleistocene paleoceanography because this area occupies a unique position in the ocean-atmosphere system over the region. In this study, we investigated paleoceanographic history, using fossil diatoms, since the Brunhes/Matuyama (B/M) paleomagnetic boundary in which glacial and interglacial periods began to alternate in 100-yr cycles. In Hole 1018A, to a depth corresponding to the beginning of Northern Hemisphere glaciation (late Pliocene), we investigated the responses of the ocean-atmosphere system to stepwise cooling in the California margin. Although the work is still continuing, this data report shows that fossil diatoms of Pliocene and Pleistocene sediments significantly changed both in quality and quantity and implies a possible relationship to global climatic changes.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 38.518275 * Median Longitude: -125.192750 * South-bound Latitude: 36.988300 * West-bound Longitude: -127.783000 * North-bound Latitude: 41.009000 * East-bound Longitude: -123.277000
Date/Time Start: 1996-05-29T01:15:00 * Date/Time End: 1996-06-15T07:45:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Ikeda, A; Koizumi, I (2000): (Table 1) Diatom abundance in ODP Hole 167-1018A sediments. https://doi.org/10.1594/PANGAEA.793431
  2. Ikeda, A; Koizumi, I (2000): (Table 4) Diatom abundance in ODP Hole 167-1018A sediments from 3.00 to 0.78 Ma. https://doi.org/10.1594/PANGAEA.793435
  3. Ikeda, A; Koizumi, I (2000): (Table 2) Diatom abundance in ODP Hole 167-1020B sediments. https://doi.org/10.1594/PANGAEA.793433
  4. Ikeda, A; Koizumi, I (2000): (Table 3) Diatom abundance in ODP Hole 167-1021B sediments. https://doi.org/10.1594/PANGAEA.793434