Extinction to recovery intervals in the Paleozoic and Mesozoic ocean anoxic events, eastern Tethys

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400500
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Kumamoto University
• Principal Investigator: Komatsu Toshifumi 熊本大学, 自然科学研究科, 准教授 (40336201)
• Co-Investigator(Kenkyū-buntansha): Takashima Reishi 東北大学, 学術資源研究公開センター総合学術博物館, 准教授 (00374207) ; Shigeta Yasunari 独立行政法人国立科学博物館, 地学研究部, 研究主幹 (30270408)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 層位・古生物学 / 地質学 / 古環境 / 進化 / 適応放散

Outline of Final Research Achievements

We geologically investigated in the Paleozoic and Mesozoic fields, Southeast and East Asia, mainly in the Devonian to Carboniferous and Permian to Triassic in Vietnam. We revealed geologic ages in detail on the basis of conodont biostratigraphic data, and reported mass extinction events and global anoxic to dysoxic events around Devonian-Carboniferous boundary (DCB), the Lower Triassic Induan-Olenekian boundary (IOB) and Smithian-Spathian boundary (SSB). The depositional environments and fossil assemblages in several sections intercalating with DCB, SSB and IOB were reconstructed by facies analysis and paleosynecological study methods. Finally we discussed about natural histories of marine organisms after extinction events thorough recovery intervals to adaptive radiations each depositional environments.

Free Research Field

層位・古生物学