ID | 13874 |
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Sort Key | 3
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Title Alternative | Distributions and ages of the Paleogene deposits in the Kibi Plateau Area, and Paleogene paleogeography
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Author |
Tanaka, Hajime
Hotani, Shu
Yamamoto, Yasuo
Danhara, Tohru
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Abstract | The "Kibi Plateau" forms a unique geomorphic province with the gently-sloping and stable continental feature. Gravel deposites called the "Mountain Gravels", are distributed sporadically in the Kibi Plateau, and have been considered Pliocene deposits. However, recent fission-track ages of the tuff beds intercalated in the deposits have indicated that the ago of deposits are Paleogen in the age. So far, fission-track ages (using zircon) of 61 to 65, 55, 37, 34 to 35 and 27 Ma are obtained. Remaining the belt-like distributions of the Paleogene gravelly valley-full deposits suggest that the Kibe Plateau has been keeping as a stable block, and repeated periods of incision followed by sedimentation of valley-fill deposits are occurred in the area during Paleogene period.
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Keywords | Kibi Plateau
gravelly valley-fill deposites
fission-track ages
Paleogene palaeogeography
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Publication Title |
Okayama University Earth Science Report
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Published Date | 2003-12-20
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Volume | volume10
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Issue | issue1
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Publisher | 岡山大学理学部地球科学教室
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Publisher Alternative | Department of Earth Sciences Faculty of Science, Okayama University
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Start Page | 15
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End Page | 22
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ISSN | 1340-7414
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NCID | AN10506284
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Content Type |
Departmental Bulletin Paper
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OAI-PMH Set |
岡山大学
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language |
Japanese
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Copyright Holders | 岡山大学地球科学研究報告編集委員会
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File Version | publisher
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Eprints Journal Name | esr
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