| Project/Area Number |
14255001
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TANABE Kazushige The University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (20108640)
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| Co-Investigator(Kenkyū-buntansha) |
NISHI Hiroshi Hokkaido University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (20192685)
KODAMA Kazuto Kochi University, Marine Core Research Center, Professor, 海洋コア研究センター, 教授 (00153560)
MAEDA Haruyoshi Kyoto University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (10181588)
SHIGETA Yasunari National Science Museum, Department of Geology, Researcher, 地学研究部, 研究官(研究職) (30270408)
TSUJINO Yasuyuki Tokushima Prefectural Museum, Department of Geology, Researcher, 地学研究部, 研究員(研究職) (60372223)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥23,790,000 (Direct Cost: ¥18,300,000、Indirect Cost: ¥5,490,000)
Fiscal Year 2004: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2003: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2002: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Keywords | North American Pacific coast / Marine Cretaceous / Biochronology / California / Alaska / ammonites / microfossils / magnetostratigraphy / 有孔虫 / 古生物地理 |
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| Research Abstract |
This study has its aims to establish chronostratigraphy and international correlation of the Cretaceous deposits in the north Pacific regions as well as to consider the establishment of the north Pacific bioprovince from analysis of yielded macro faunas. For this purpose, international field expedition has been carried out in 2002-2004 for the marine Cretaceous deposits on the U.S.Pacific coast. The marine Cretaceous deposits (Great Valley Sequence) widely exposed along the Sacramento Valley, northern California and those in the Talkeetna Mountains, southern Alaska have been studied from the lithostratigraphic, biostratigraphic and magnetostratigraphic points of view. As a result of our field and laboratory studies successively collected fossil samples and sediment core samples, detailed mega-and microfossil biostratigraphic frameworks have been established for the Barremian to Turonian sequence in the North Fork Cottonwood Creek, northern California. Also, five magnetostratigraphic stages, i.e., M5,M3,M1,M0r,C34n (with M-1r reversal horizon) were recognized in the Barremian to Lower Albian sequence. This is the first report of the high-resolution Early to Middle Cretaceous biochronology and magnetostraligraphy in the North pacific regions. We have also recognized the continuous highly fossiliferous marine Campanian to Maastrichtiain strata from the Talkeetna Mountains, southern Alaska.
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