1996 Fiscal Year Final Research Report Summary
RECONSTRUCTION OF PALEOENVIRONMENTS DURING THE MIDDLE PLEISTOCENE BASED ON THE CORRELATION OF WIDE-SPREADED VOLCANIC ASHES
| Project/Area Number |
07304072
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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 | 総合 |
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| Research Field |
Geology
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| Research Institution | FACULTY OF SCIENCE,OSAKA CITY UNIVERSITY |
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Principal Investigator |
KUMAI Hisao DEP.GEOSCIENCES,FAC.SCIENCE,OSAKA CITY UNIV., PROFESSOR, 理学部, 教授 (40020680)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMOKAWA Kouichi INST.ENVIRONMENT,GEOLOGICAL SURVEY OF JAPAN,SENIOR RESEAR., 環境地質部, 主任研究官
KIKKAWA Kiyoshi INST.ENVIRONMENT,GEOLOGICAL SURVEY OF JAPAN,SENIOR RESEAR., 環境地質部, 主任研究官
SUZUKI Takehiko DEP.GEOGRAPHY,FAC.SCIENCE,TOKYO METRO.UNIV., ASSIST., 理学部, 助手 (60240941)
KIKUCHI Takao DEP.GEOGRAPHY,FAC.SCIENCE,TOKYO METRO.UNIV., ASSOCIATE PROF., 理学部, 助教授 (10087140)
YOSHIKAWA Syusaku DEP.GEOSCIENCES,FAC.SCIENCE,OSAKA CITY UNIV., ASSOCIATE PROF., 理学部, 助教授 (30047394)
SAKAI Junichi DEP.GEOLOGY,FAC.SCIENCE,SHINSHU UNIV., PROF.
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| Project Period (FY) |
1995 – 1996
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| Keywords | wide-spreaded volcanic ashes / Middle Pleistocene / reconstruction of paleoenvironment / correlation of stratigraphy / paleoclimate / records of volcano activity / regional variation / Lower-Middle Pleistocene boundary |
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| Research Abstract |
The subject of this research project is to reconstruct of paleoenvironment during the Middle Pleistocene of the area from central Honshu to Kanto district based on the correlation of wide-spreaded volcanic ashes such as B_1, B_2, and B_3. After the establishment of correlation of stratigraphy used wide-spreaded volcanic ashes as the time marker, the paleoclimate and paleogeomorphological features are reconstruct.
Result of the studies, about 10 wide-spreaded volcanis ashes intercalated in the Lower to Middle Pleistocene sediment were correlated from central Honsyu to Kanto district. Some of the horizons interbeded between the wide-spreaded volcanic ashes indicate the warm climate. Especially, the sediment deposited around 0.42 Ma indicate the most warm climate during the Middle pleistocene and correspond to the 11.3 ^<18>0 stage. And regarding on the Lower-Middle Pleistocene boundary also correlated from Boso peninsula to inland basin such as Yatsugatake region and Matsumoto basin.
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