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Planktonic Foraminiferal Biostratigraphy of the Late Cenozoic Sedimentary Sequence, Central Honshu, Japan
http://hdl.handle.net/10097/28831
http://hdl.handle.net/10097/2883102c3edc2-45a6-4105-9d75-df74a5966728
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00004211865.pdf (11.0 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2008-05-02 | |||||||
| タイトル | ||||||||
| タイトル | Planktonic Foraminiferal Biostratigraphy of the Late Cenozoic Sedimentary Sequence, Central Honshu, Japan | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 著者 |
Oda, Motoyoshi
× Oda, Motoyoshi
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Stratigraphic changes of planktonic foraminiferal assemblages in the Boso Peninsula, the Kakegawa area, and the Takasaki area situated along the Pacific side of central Honshu, Japan have been analyzed. These land-based sections provide a valuable record of planktonic foraminiferal events which took place during the Late Cenozoic in the middle latitude region of the North Pacific. Especially, the Boso section in which foraminifera are generally abundant and well preserved with prominent planktonic forms represents the most complete stratigraphic succession in the present study. The Boso section is also suitable for constructing the paleomagnetic stratigraphy as well as the biostratigraphy, because tuff beds frequently intercalated in the sequence serve as good keys for determining the stratigraphic position of samples from separate outcrops with considerable accuracy. Thirteen planktonic foraminiferal levels on the basis of first and last occurrences and three distinct levels defined by the coiling direction shift in the genus Pulleniatina are useful for stratigraphic correlation of the Middle Miocene to Pleistocene sequence distributed in the regions on the western Pacific side of Japan. They may not be applicable elsewhere, although some of these events seem to be important for a time-stratigraphic correlation of widely separate localities. The magnetic polarity sequence determined by measuring detrital remanent magnetization of samples from the same section of the Boso Peninsula of the present study is interpreted on the basis of six principal levels of the planktonic foraminifera, in comparison to a combined planktonic foraminiferal biostratigraphy and magnetostratigraphy established in deep-sea cores in the equatorial Pacific covering the time span from the Magnetic Epoch 5 to the Brunhes Normal Epoch. Climatic fluctuation within the Pleistocene on the basis of the vertical changes of the planktonic foraminiferal assemblages in the Boso sequence which were dated in terms of the paleomagnetic scale shows a warming trend across the Olduvai Event. A cooling trend, denoted by the upward decrease in the abundance of warm-water fauna associated with an increased abundance of cold-water fauna and influx of sinistral coiling Globigerina pachyderma in varying frequency, occurs shortly before the Jaramillo Event prior to the onset of the severe cooling in the earlier part of the Brunhes Normal Epoch. This may mark the initiation of mid-latitude glaciation. | |||||||
| 書誌情報 |
The science reports of the Tohoku University. Second series, Geology = 東北大学理科報告. 地質学 巻 48, 号 1/2, p. 1-A24, 発行日 1978-03-29 |
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| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0082464X | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA00836349 | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | application/pdf | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 出版者 | ||||||||
| 出版者 | Tohoku University | |||||||
| 資源タイプ | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 紀要類(bulletin) | |||||||
| 登録日 | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 公開日（投稿完了日） | ||||||||
| 日付 | 2008-05-02 | |||||||
| 日付タイプ | Created | |||||||
| 発行日 | ||||||||
| 日付 | 1978-03-29 | |||||||
| 日付タイプ | Created | |||||||
| フォーマット | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 10975315 bytes | |||||||
| 更新日 | ||||||||
| 日付 | 2010-01-27 | |||||||
| 日付タイプ | Created | |||||||
