2014 Fiscal Year Final Research Report
Temporal and geographical changes of faunal provinces on sea surface in high latitudes based on Quaternary planktic foraminifera
Project/Area Number |
24740346
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Stratigraphy/Paleontology
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Research Institution | Akita University |
Principal Investigator |
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Keywords | 地球史 / 浮遊性有孔虫 / 形態解析 / 北大西洋 / 北西太平洋 / 南大西洋 |
Outline of Final Research Achievements |
A morphological analysis of planktic forminifer Neogloboquadria pachyderma (sinistral) was carried out to introduce a paleoenvironmental proxy. Detailed morphological variability in the species was obtained from IODP Site U1304, the North Atlantic Ocean, where the species calcareous tests were exceptionally-well preserved. At the site, the species tests of small and more elongate in outline dominated ca. 0.36 Ma, while little fluctuation in size was observed through the analysed horizons for the last 1.6 million years. This findings suggest that the temporal morphological variation was caused by lateral movement of water masses around the site in 0.36 Ma.
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Free Research Field |
微古生物学
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