ID | 13885 |
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Sort Key | 1
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タイトル(別表記) | Miocene Ukan Formation, Ukan Area, Okayama Prefecture, Southwest Japan
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フルテキストURL | |
著者 |
藤原 貴生
Ryutenn Astro Park
田口 栄次
Reserach org. for Environmental Geology of Setouchi, Okayama University
鈴木 茂之
Department of Earth Sciences, Faculity of Science, Okayama University
Kaken ID
publons
researchmap
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抄録 | In this paper, we deal with the Miocene Ukan Formation, sporadically distributed in Ukan-cho, Okayama prefecture, from a viewpoint of analysis of lithology and molluscan assemblages.
The Ukan Formation is lithostratigraphically divided into the Suzuoka Conglomerate, Yamagata Muddy Sandstone, Shimoyokomi Sandstone and Conglomerate, Azechi Sandstone and Conglomerate, Tsuneyama Siltstone Members in ascending order.
The following 6 molluscan assemblages are recognized.
The lower four members and the last member is correlative to the Lower Sandstone and Upper Shale Formation of the Bihoku Group, respectively judging from lithology and fauna.
The temporal chages of the above mentioned molluscan assemblages represents that gradual deeping of sea during the depositional period from the Suzuoka Conglomerate and Yamagata Muddy Sandstone Members to the Azechi Sandstone and Conglomerate Member via the Shimoyokomi Sandstone and Conglomerate Member, and abrupt deeping of sea seems to have happened between the Azechi Sandstone and Conglomerate Member and the Tsuneyame Siltstone Member.
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キーワード | Lithology
Molluscan assemblage
Paleoenvironmental change
Ukan Miocene
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出版物タイトル |
Okayama University Earth Science Report
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発行日 | 2001-09-20
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巻 | 8巻
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号 | 1号
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出版者 | 岡山大学理学部地球科学教室
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出版者(別表記) | Department of Earth Sciences Faculty of Science, Okayama University
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開始ページ | 1
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終了ページ | 12
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ISSN | 1340-7414
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NCID | AN10506284
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資料タイプ |
紀要論文
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OAI-PMH Set |
岡山大学
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言語 |
日本語
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著作権者 | 岡山大学地球科学研究報告編集委員会
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論文のバージョン | publisher
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NAID | |
Eprints Journal Name | esr
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