隠岐島後,久見より中期中新世貝類化石の発見 Discovery of Middle Miocene Mollusus at Kumi, Dogo, Oki Islands

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Oki islands have been familiar to the Japanese geologists as the working area of petrological studies of alkaline rocks, while the biostratigraphic works have not so developed as to establish the whole successions. It is the upper Miocene to be confirmed as the oldest horizon by marine fauna. TOMITA (1936) first reported the occurrence of Cardium shinjiense, Crenella paeramaena, Mya arenaria, Pecten swiftii, P. yessoensis, Natica janthostoma, Chrysodomus despectus and Thyasira bisecta from his Dogo group. Later, foraminifers such as Cibicides lobatulus, Globigerina bulloides, Uvigerina subperegrina, Epistominella japonica and so on, were found out by TAI (1954) from the same horizon. Since then, these fossils have been regarded as the indicators of the upper Miocene, and the whole successions of volcanic activities have been made on this paleontologic basis Accordingly, a new middle Miocene fauna described below as Kumi fauna is quite noteworthy, because it means the first evidence of the middle Miocene transgression in Oki islands. It is, moreover, interesting in the paleo-ecological considerations that this new fauna is composed mainly of rocky bottom inhabitants in the warm current. Before entering into the description, the authors wish to express their hearty thanks to Mr. S. KASAMATSU of Education Office of Saigo-cho for the information of fossil locality, and Dr. M. OMORI of Azabu Veterinary College and Dr. J. ITOIGAWA Of Nagoya University for their kind suggestions on paleontology.

収録刊行物

  • 島根大学理学部紀要

    島根大学理学部紀要 13, 121-130, 1979-12-20

    島根大学

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  • NII論文ID(NAID)
    110000993529
  • NII書誌ID(NCID)
    AN00108106
  • 本文言語コード
    ENG
  • 資料種別
    Departmental Bulletin Paper
  • 雑誌種別
    大学紀要
  • ISSN
    03879925
  • NDL 記事登録ID
    2426365
  • NDL 刊行物分類
    ME71(古生物)
  • NDL 雑誌分類
    ZM2(科学技術--科学技術一般--大学・研究所・学会紀要)
  • NDL 請求記号
    Z14-380
  • データ提供元
    CJP引用  NDL  NII-ELS  IR 
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