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ID 13885
JaLCDOI
Sort Key
1
タイトル(別表記)
Miocene Ukan Formation, Ukan Area, Okayama Prefecture, Southwest Japan
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
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.
キーワード
Lithology
Molluscan assemblage
Paleoenvironmental change
Ukan Miocene
出版物タイトル
Okayama University Earth Science Report
発行日
2001-09-20
8巻
1号
出版者
岡山大学理学部地球科学教室
出版者(別表記)
Department of Earth Sciences Faculty of Science, Okayama University
開始ページ
1
終了ページ
12
ISSN
1340-7414
NCID
AN10506284
資料タイプ
紀要論文
OAI-PMH Set
岡山大学
言語
日本語
著作権者
岡山大学地球科学研究報告編集委員会
論文のバージョン
publisher
NAID
Eprints Journal Name
esr