Radiolarian fossils from the Nishinoomote Formation of the Kumage Group in the South Shimanto Belt, Tanegashima Island

  • TANGE Terumichi
    Department of Science, Graduate school of Science and Technology, Shinshu University
  • TOKIWA Tetsuya
    Matsumoto Branch of the Association for the Geological Collaboration in Japan Faculty of Science, Shinshu University

Bibliographic Information

Other Title
  • 種子島に分布する四万十帯南帯熊毛層群西之表層から得られた放散虫化石
  • タネガシマ ニ ブンプ スル ヨンマンジュウタイ ナンタイ クマゲソウグン ニシノオモテソウ カラ エラレタ ホウサンチュウ カセキ

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<p>We carried out geological and radiolarian studies in the northern part of the Nishinoomote Formation of the Kumage Group in the South Shimanto Belt, Tanegashima Island. The Nishinoomote Formation in the study area consists mainly of thick bedded sandstone and alternating beds of sandstone and shale with minor amount of varicolored shale. As a result of the radiolarian study, Late Eocene radiolarians such as Lithocyclia ocellus group and Lychnocanium neptunei were obtained from two samples of black shales, and Late Eocene radiolarians such as Lychnocanoma babylonis and Shiphocampe missilis were recognized in one sample of varicolored shale. In the previous study, Early Oligocene radiolarian fossils and calcareous nannofossils had been reported from the northernmost part of the Nishinoomote Formation. Therefore, considering the difference of depositional age and lithology, further study is needed to clarify the relationship between the northernmost part and the northern part of the Nishinoomote Formation.</p>

Journal

  • Earth Science (Chikyu Kagaku)

    Earth Science (Chikyu Kagaku) 74 (3), 99-103, 2020-07-25

    The Association for the Geological Collaboration in Japan

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