Numerical age of the planktonic foraminiferal zonal boundary between N.15 and N.16 in the mid-latitude Northwest Pacific region

Author(s): Hayashi, Hiroki; Takahashi, Masaki
Author Affiliation(s): Primary:
Shiman University, Department of Geosciences, Matsue, Japan
California Academy of Sciences, United States
Geological Survey of Japan, Japan
Volume Title: Selected papers of 9th ICPNS (International congress on Pacific Neogene stratigraphy)
Volume Author(s): Ogasawara, Kenshiro, prefacer; Marincovich, Louie, Jr.; Kano, Kazuhiko; Yanagisawa, Yukio
Source: Chishitsu Chousa Kenkyuu Houkoku = Bulletin of the Geological Survey of Japan, 59(7-8), p.415-422; 9th International congress on Pacific Neogene stratigraphy, Tsukuba, Japan, Oct. 1-3, 2007, prefaced by Kenshiro Ogasawara, Louie Marincovich, Jr., Kazuhiko Kano and Yukio Yanagisawa. Publisher: Sangyou Gijutsu Sougou Kenkyuujo Chishitsu Chousa Sougou Senta, Tsukuba, Japan. ISSN: 1346-4272
Note: In English with Japanese summary. 26 refs.; illus., incl. strat. cols., 1 table, geol. sketch map
Summary: The first occurrence of the planktonic foraminiferal species Neogloboquadrina acostaensis, which defines the zonal boundary between zones N.15 and N.16, was precisely determined just above the KT-1 Tuff in the lower part of the Kubota Formation in the Tanagura area, Northeast Japan. According to radiometric ages of the KT-1 Tuff, this biohorizon is estimated at 10.6 Ma. Compiling deep-sea drilling data demonstrates that the biohorizon as synchronous at least in the mid-latitudes.
Year of Publication: 2008
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Asia; Assemblages; Atlantic Ocean; Biostratigraphy; Biozones; Cenozoic; DSDP Site 563; DSDP Site 588; DSDP Site 608; Deep Sea Drilling Project; Far East; Faunal list; Foraminifera; Fukushima Japan; Globigerinacea; Honshu; IPOD; Invertebrata; Japan; Kubota Formation; Leg 82; Leg 90; Leg 94; Lithostratigraphy; Lord Howe Rise; Microfossils; Mid-Atlantic Ridge; Miocene; Morphology; Neogene; Neogloboquadrina; Neogloboquadrina acostaensis; North Atlantic; North Pacific; Northeast Atlantic; Northwest Pacific; Pacific Ocean; Protista; Rotaliina; South Pacific; Southwest Pacific; Tanagura Japan; Taxonomy; Tertiary; Upper Miocene; West Pacific
Coordinates: N370000 N370000 E1402400 E1402400
S260642 S260642 E1611336 E1611336
N425012 N425013 W0230515 W0230515
N333831 N333832 W0434602 W0434603
Record ID: 2009094626
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