| Project/Area Number |
26400499
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Niigata University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NODA Atsushi 産業技術総合研究所, 地質情報研究部門, 主任研究員 (50357745)
HARA Hidetoshi 産業技術総合研究所, 地質情報研究部門, 主任研究員 (60357811)
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| Research Collaborator |
HARA Kousuke
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 放散虫 / 白亜紀 / 生息深度 / 機能形態 / 収斂 |
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| Outline of Final Research Achievements |
The comparative research for Late Cretaceous radiolarian faunas within shallow-marine and deep-water sediments of Japan (Izumi and Yezo groups) and Oman (Suhaylah and Zabyat formations) was conducted to distinguish the depth distribution of each species from fossil assemblages. As a result, it confirmed that large discoidal spumellarians occur abundantly the shallow-marine sediments. Characteristic faunal compositions were also observed corresponding to the development of peculiar water mass structures. In addition, the fossil species considered to be a surface dweller has the same morphological features as recent shallow-water species. It implies that these common characteristics are attributed to a morphological convergence as an adaptive strategy for the shallow-marine environment. These findings indicate that it is possible to distinguish the depth distribution of radiolarians from the fossil assemblage.
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