ID | 117773 |
Title Alternative | Preliminary reports of the Quaternary sediment core drilled in Nakatokushima-cho Tokushima City, West Japan
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Author |
Nakatani, Koretaka
AIST
Nishiyama, Kenichi
Tokushima University
Tokushima University Educator and Researcher Directory
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Nakao, Kenichi
Tokushima Prefectural Museum
Sato, Yoshiki
AIST
Haneda, Yuki
AIST
Suzuki, Yoshiaki
AIST
Mizuno, Kiyohide
AIST
Nakashima, Rei
AIST
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Keywords | Tokushima Plain
Quaternary
Tephra
Radiocarbon
Pollen
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Content Type |
Journal Article
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Description | A 80 m-long borehole core (TK-B-1) drilled in the Tokushima Plain was examined. Based on the sedimentary facies, volcanic ash layers, pollen fossils and radiocarbon dates, this core was divided into the following 13 units. Unit 1 is a metamorphic rock that forms the base of the Tokushima Plain. Units 3 to 8 are Pleistocene and consist of marine and fluvial strata. Units 12-10 are considered to be Alluvium based on radiocarbon dates, and K-Ah tephra found in Unit 11. In Unit 10, we found a volcanic glass concentration derived from AT tephra, but the concentration is a possibility of rework. We intend to reveal the subsurface geological structure of the Tokushima Plain based on the database of borehole data, lithologic stratigraphy, volcanic ash stratigraphy and biostratigraphy.
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Journal Title |
GSJ Interim Report
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Volume | 82
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Start Page | 7
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End Page | 20
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Published Date | 2021-11
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Remark | 令和2年度沿岸域の地質・活断層調査研究報告
Annual Report of Investigations on Geology and Active Faults in the Coastal Zone of Japan (FY2020) 出典:産総研地質調査総合センターウェブサイト(https://www.gsj.jp/researches/project/coastal-geology/sokuho/r2sokuho.html) |
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language |
jpn
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departments |
Science and Technology
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