Planktonic foraminiferal zonation in the Cretaceous Yezo Group, Central Hokkaido, Japan

Nishi, Hiroshi; Takashima, Reishi; Hatsugai, Takayuki; Saito, Tsunemasa; Moriya, Kazuyoshi; Ennyu, Atsuhito; Sakai, Toshiaki

Planktonic foraminiferal zonation in the Cretaceous Yezo Group, Central Hokkaido, Japan

Nishi, Hiroshi; Takashima, Reishi; Hatsugai, Takayuki et al.

Journal of Asian Earth Sciences, 2003, 21(8), 867-886

Permalink : https://hdl.handle.net/2115/17185

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アクセス権	open access
URI	https://hdl.handle.net/2115/17185
タイトル	Planktonic foraminiferal zonation in the Cretaceous Yezo Group, Central Hokkaido, Japan
著者	Nishi, Hiroshi ; Takashima, Reishi ; Hatsugai, Takayuki ; Saito, Tsunemasa ; Moriya, Kazuyoshi ; Ennyu, Atsuhito ; Sakai, Toshiaki
著者名 Nishi, Hiroshi
著者名 Takashima, Reishi
著者名 Hatsugai, Takayuki
著者名 Saito, Tsunemasa
著者名 Moriya, Kazuyoshi
著者名 Ennyu, Atsuhito
著者名 Sakai, Toshiaki
言語	英語
キーワード	Planktonic foraminifers
	Biostratigraphy
	Cretaceous
	Hokkaido
	Japan
発行日	2003-06
出版者	Elsevier Science Ltd.
収録物名	Journal of Asian Earth Sciences
巻(号)	21(8)
ページ	867-886
抄録	The mudstone of the Yezo Group exposed in Central Hokkaido yields abundant microfossils of calcareous nannofossils, foraminifers, radiolarians and dinoflagellates. Benthic foraminifers consisting of both agglutinated and calcareous species occur abundantly and consistently throughout the sequence, while specimens of planktonic foraminifers are generally fewer than benthics in all samples. We recognized the following 13 planktonic foraminiferal zones assigned to the late Aptian to early Campanian in the Oyubari and Haboro–Kotanbetsu areas; (1) Globigerinelloides spp., (2) Ticinella primula, (3) Biticinella breggiensis, (4) Rotalipora subicinensis–Rotalipora ticinensis, (5) Rotalipora appenninica, (6) Rotalipora globotruncanoides, (7) Rotalipora cushmani (8), Whiteinella archaeocretacea (9) Helvetoglobotruncana helvetica, (10) Marginotruncana pseudolinneiana, (11) Marginotruncana sinuosa, (12) Contusotruncana fornicata, (13) Globotruncana arca. The Globigerinelloides spp. to H. helvetica Zones (late Aptian to early Turonian) can be correlated with standard zones in the Tethyan regions, whereas the assemblages from the M. pseudolinneiana to G. arca zones lack tropical zonal markers of Dicarinella concavata, D. asymetrica and Globotruncanita elevata in many studied sections. The scarcity or lack of tropical zonal species during the late Turonian to early Campanian suggests that the Oyubari and Haboro–Kotanbetsu regions in Hokkaido were located in the Transitional to Boreal biogeographical provinces.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	1367-9120
関連情報	URI http://www.sciencedirect.com/science/journal/13679120
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/S1367-9120(02)00138-4