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Title: 北海道シューパロ川流域に分布する白亜系の地質と浮遊性有孔虫化石層序
Other Titles: Geology and planktonic foraminiferal biostratigraphy of Cretaceous strata distributed along the Shuparo River,Hokkaido,Japan
Authors: 高嶋, 礼詩1 Browse this author
西, 弘嗣2 Browse this author
斎藤, 常正3 Browse this author
長谷川, 卓4 Browse this author
Authors(alt): Takashima, Reishi1
Nishi, Hiroshi2
Saito, Tsunemasa3
Hasegawa, Takashi4
Keywords: Hokkaido
Yezo Group
Early Cretaceous
planktonic foraminifera
"Orbitolina-Praecaprotina limestone"
Issue Date: 15-Jun-1997
Publisher: 日本地質学会
Journal Title: 地質學雜誌
Journal Title(alt): Journal of the Geological Society of Japan
Volume: 103
Issue: 6
Start Page: 543
End Page: 564
Abstract: A continuous sequence of the lower and middle parts of the Cretaceous Yezo Group is exposed in the northern part of the Oyubari area, central Hokkaido. This group, striking in a north-south direction, consists chiefly of turbidite and interbedded hemipelagic mudstone sequences and intercalates a prominent olistostrome unite in its lower part. The lower and middle parts of Yezo Group in the studied area comprise the following five formations in ascending order: the Tomitoi Formation (sandstone-dominants alternative beds of sandstone and mudstone), the Shuparogawa Formation (thinly alternating beds of sandstone and mudstone, including Orbitolina-Praecaprotina limestone olistolith in its middle part), the Maruyama Formation (debris flow deposits and tuffaceous sandstone), the Hikagenosawa Formation (laminated mudstone and massive mudstone), and the Takinosawa Formation (mudstone-dominant alternating beds of mudstone and sandstone). These formations yield the following planktonic foraminiferal species which are useful for interregional correlation: Globigerinelloides duboisi, Hedbergella gorbachilae, Ticinella primula, Biticinella breggiensis, Rotalipora subticinesis, Rotalipira brotzeni, Rotalipora cushmani, and Helvetoglo-botruncana Helvetica. Based on the stratigraphic distribution of these age-diagnostic species, the Tomitoi Formation and the middle part of the Shuparogawa Formation are correlated with the late Aptian Stage, the upper part of the Shuparogawa Formation and the lower part of the Hikagenosawa Formation with the Albian Stage, the middle part of the Hikagenosawa Formation and the lowermost part of the Takinosawa Formation with the Cenomanian Stage, and the lower part of the Takinosawa Formation with the Turonian Stage.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高嶋 礼詩

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