2011 Fiscal Year Final Research Report
Modes of ammonoid occurrence and preservation in siderite concretion
| Project/Area Number |
21540483
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | イノセラムス / 化石 / 産状 / センサス群集 / タフォノミー / 菱鉄鉱ノジュール |
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| Research Abstract |
Well preserved census assemblages of Sphenoceramus naumanni were newly discovered from several unfossiliferous horizons including oxygen-depleted environments, in which siderite nodules were formed. Still retaining their life-habit, they seemed to be buried and preserved in situ. The paradoxical result that the fossil individuals lived in unsuitable condition retained much original ecological information would be a tip to reconstruct paleoecology of inoceramid bivalves in further research.
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