Earth Science (Chikyu Kagaku)
Online ISSN : 2189-7212
Print ISSN : 0366-6611
Volume 74 , Issue 3
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Research Article
Short Report
  • Terumichi TANGE, Tetsuya TOKIWA
    Type: short report
    2020 Volume 74 Issue 3 Pages 99-103
    Published: July 25, 2020
    Released: February 25, 2021
    JOURNALS FREE ACCESS

    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.

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