Kurita, Hiroshi; Obuse, Akiko (2003): Middle Miocene-uppermost lower Pliocene dinoflagellate cyst biostratigraphy, ODP Leg 186 Hole 1151A, off Sanriku coast of northern Japan, northwestern Pacific. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: Suyehiro, Kiyoshi, Sacks, I. Selwyn, Acton, Gary D., Acierno, Michael J., Araki, Eiichiro, Ask, Maria V. S., Ikeda, Akihiro, Kanamatsu, Toshiya, Kim, Gil Young, Li, Jingfen, Linde, Alan T., McWhorter, Paul N., Mora, German, Najman, Yanina M. R., Niitsuma, Nobuaki, Pandit, Benoy K., Roller, Sybille, Saito, Saneatsu, Sakamoto, Tatsuhiko, Shinohara, Masanao, Sun, Yue-Feng, Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999, 186, georefid:2004-011516

Abstract:
More than 70 dinoflagellate cyst taxa have been encountered in a palynological study of 34 samples from part of the Neogene section of Hole 1151A, Ocean Drilling Program (ODP) Leg 186 off the Sanriku Coast of northern Japan, northwestern Pacific. According to the diatom biostratigraphy, the age of the studied section ranges from the latest early Pliocene down to the earliest middle Miocene. On the basis of the present analysis, 17 biohorizons and possible biohorizons are discriminated as potential biostratigraphic markers. Seven acme events are also listed. The biohorizons show overall consistency with the stratigraphic ranges of species given by earlier studies of onshore sections in northern Japan, which indicates regional implications of those biostratigraphic events. In addition, dominance of protoperidiniacean species in the late late Miocene to early Pliocene assemblages from the present hole compares with a similar dominance of the same age reported previously in the Bering Sea and northern North Pacific. This implies establishment of nutrient-rich surface water in the wide region of the northwestern to north Pacific in the late Miocene.
Coverage:
West: 143.2000 East: 143.2000 North: 38.4500 South: 38.4500
Relations:
Expedition: 186
Site: 186-1151
Supplemental Information:
Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendices
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.186.105.2003 (c.f. for more detailed metadata)
Data download: application/pdf
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