{"created":"2023-07-27T04:39:24.861827+00:00","id":12028,"links":{},"metadata":{"_buckets":{"deposit":"6040d4ef-98de-4008-964d-3a5720f97312"},"_deposit":{"created_by":3,"id":"12028","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"12028"},"status":"published"},"_oai":{"id":"oai:tohoku.repo.nii.ac.jp:00012028","sets":["91:155"]},"author_link":["26638"],"item_4_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1978-03-29","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1/2","bibliographicPageEnd":"A24","bibliographicPageStart":"1","bibliographicVolumeNumber":"48","bibliographic_titles":[{"bibliographic_title":"The science reports of the Tohoku University. Second series, Geology  = 東北大学理科報告. 地質学"}]}]},"item_4_date_62":{"attribute_name":"登録日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2008-05-02","subitem_date_issued_type":"Created"}]},"item_4_date_63":{"attribute_name":"公開日（投稿完了日）","attribute_value_mlt":[{"subitem_date_issued_datetime":"2008-05-02","subitem_date_issued_type":"Created"}]},"item_4_date_65":{"attribute_name":"発行日","attribute_value_mlt":[{"subitem_date_issued_datetime":"1978-03-29","subitem_date_issued_type":"Created"}]},"item_4_date_80":{"attribute_name":"更新日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-01-27","subitem_date_issued_type":"Created"}]},"item_4_description_15":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"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.","subitem_description_type":"Abstract"}]},"item_4_description_41":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"紀要類(bulletin)","subitem_description_type":"Other"}]},"item_4_description_66":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"10975315 bytes","subitem_description_type":"Other"}]},"item_4_publisher_34":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Tohoku University"}]},"item_4_radio_69":{"attribute_name":"公開範囲","attribute_value_mlt":[{"subitem_radio_item":"学外"}]},"item_4_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0082464X","subitem_source_identifier_type":"ISSN"}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00836349","subitem_source_identifier_type":"NCID"}]},"item_4_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Oda, Motoyoshi"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-02-03"}],"displaytype":"detail","filename":"KJ00004211865.pdf","filesize":[{"value":"11.0 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"KJ00004211865.pdf","url":"https://tohoku.repo.nii.ac.jp/record/12028/files/KJ00004211865.pdf"},"version_id":"dca95c95-382b-4926-a6ca-9e89fdb6bc7d"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Planktonic Foraminiferal Biostratigraphy of the Late Cenozoic Sedimentary Sequence, Central Honshu, Japan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Planktonic Foraminiferal Biostratigraphy of the Late Cenozoic Sedimentary Sequence, Central Honshu, Japan"}]},"item_type_id":"4","owner":"3","path":["155"],"pubdate":{"attribute_name":"公開日","attribute_value":"2008-05-02"},"publish_date":"2008-05-02","publish_status":"0","recid":"12028","relation_version_is_last":true,"title":["Planktonic Foraminiferal Biostratigraphy of the Late Cenozoic Sedimentary Sequence, Central Honshu, Japan"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2023-07-27T17:33:50.154511+00:00"}