| Project/Area Number |
11640458
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Osaka City University |
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Principal Investigator |
KUMAI Hisao Dept.of Geosciences, Fac.of Science, Osaka City University, 理学部, 教授 (40020680)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Pleistocene / Volcanic activity / lacustrine / verve like layers / paleontology / paleoenvironmental change |
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| Research Abstract |
The Middle Pleistocene lacustrine sediment occupies on the southeast slope of Yatsugatake volcano. It is named Kawakami lake deposit which intercalates several kinds of tephra layer such as scoria and volcanic ash. Some parts of the sediment are composed of so called verve like clay which are alternated with black and white band. Thickness of each layer is around 2mm. It can be calculated total layers more than 3,000 within about 5m of sediment. According to the result of diatomite analysis, the whitish part formed from autumn to spring. It may be indicated a set of white and dark bands as a annual deposit set. The *alynological analysis indicates that the vegetation change after falling a scorian layer may be characterized with the decrease of herbs.
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