福井県坂井市三国町に分布する中部中新統米脇層の生痕化石群集

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  • フクイケン サカイシ ミクニマチ ニ ブンプ スル チュウブ チュウ シントウベイ ワキソウ ノ セイコン カセキ グンシュウ
  • Ichnofauna from the Middle Miocene Komegawaki Formation Mikuni-cho, Sakai City, Fukui Prefecture, Japan
Published
2021-12-01
Resource Type
departmental bulletin paper
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  • 福井大学地域環境研究教育センター
Publisher
福井大学地域環境研究教育センター

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Description

Trace fossils from the Middle Miocene (about 14 to 12 Ma) Komegawaki Formation in the Echizen Coast area, Fukui Prefecture, central Japan. Ichnofacies revealed that the paleoenvironment of the Shuku Tuff Member in the Komegawaki Formation is the Cruziana ichnofacies from the lower shoreface to the inner shelf zone. The ichnofacies contained seven ichnospecies such as Conichnus conicus, Cylindrichnus concentricus, Paleophycus haberti, Phycosiphon incertum, Rosselia socialis, Teichichnus isp. and Thalassinoides isp. The presence of Phycosiphon incertum revealed that alternating layers of mudstone and fine-grained sandstone of the Shuku Tuff Member were deposited in a sea area with low oxygen.

source:http://recre.ou.u-fukui.ac.jp/research.html#kiyou

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