1987 Fiscal Year Final Research Report Summary
Fundamental research for the restoration of the Late Cenozoic paleoenvirons by using planktic microfossils in the Northwest Pacific
| Project/Area Number |
61540565
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Kumamoto University |
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Principal Investigator |
ODA Motoyoshi Faculty of Science, Kumamoto Univ. Associate Professor, 理学部, 助教授 (60108454)
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| Co-Investigator(Kenkyū-buntansha) |
MANABE Kenichi Faculty of Education, Fukushima Univ. Associate Professor, 教育学部, 助教授 (10007354)
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| Project Period (FY) |
1986 – 1987
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| Keywords | Late Cenozoic / planktic foraminifera / biostratigraphy / magnetostratigraphy / correlation / paleogeography / 古地理 / 古海洋 |
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| Research Abstract |
We studied the planktic foraminiferal biostratigraphy partly combined with magnetostratigraphy of the Pliocene strata distributed in the Okinawa, Miyazaki, Nabari, Yotsukura and Nakajo areas. Detailed correlation done by present study enable us to reconstruct precise paleoceanography and paleogeography in Pliocene in order of 0.1 Ma resolution.
Planktic foraminiferal biostratigraphy was made on the Neogene strata in the Fujikawa area of the southern Fossa-Magna region (Oda et et., 1987, Fossil, vol43). Paleogeography and paleoceanography of the Fossa-Magna region and its surrounding areas, central Japan, During the Middle Miocene has been presumed by the paleobathymetric and sedimentologic data and biogiographic connections of planktic foraminifera under the detailed correlation of the Neogene strata distributed in the Fujikawa, Shinshu, Boso, Kakegawa and Takasaki areas. The Kofu sea way between the southern and northern areas of the Fossa-Magna region existed in the early Middle Miocene when the warm surface water prevailed and also in the middle Middle Miocene when the cool surface water flowed from north to south. However, in the late Middle Miocene, the sea way has colsed due to the uplifting the Kanto and Koma massifs and the circulation patterns of surface water changed radically owing to the creation of the geographic Barrier.
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Research Products
(2 results)
