| Project/Area Number |
26750109
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geography
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Tanabe Susumu 国立研究開発法人産業技術総合研究所, 地質情報研究部門, 主任研究員 (50415709)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 完新世 / 海水準低下 / 霞ヶ浦 / 植物遺体 / アイソスタシー / 堆積物荷重 / 海水準変動 / 利根川低地 / 縄文海進 / 湖棚 |
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| Outline of Final Research Achievements |
Beneath the Innermost Tonegawa Lowland, I discovered lake sediments, which indicate the paleo-water depth of ca. 1-2 m, deposited in relation to sea-level rise during 3-2 cal kyr BP. The sea-level index points of the lake sediments indicate that sea level dropped to -2.2 m T.P. at 3.0 cal kyr BP when the paleo-water depth estimated from plant macrofossils in the lake sediments is regarded as 2 m. This finding shows that the “Yayoi regression” existed in the Innermost Tonegawa Lowland, and it influenced on the evolution of the modern fluvial geomorphology in the Tokyo Lowland.
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