貝形虫およびカイエビ化石の生層序とジルコン―フィッション・トラック法に基づく篠山層群の年代の再考 Revised age of the Sasayama Group, southwest Japan, based on ostracode and conchostracan bio-stratigraphy and zircon fission-track dating

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The age of the non-marine Cretaceous Sasayama Group, distributed in western Honshu, Japan, was reassessed based on ostracod and conchostracan bio-stratigraphy, and zircon fission-track dating. The ostracod genera <i>Mongolocypris</i> and <i>Eucypris</i> from the lower part of the Sasayama Group, combined with the conchostracan genera <i>Yanjiestheria</i> and <i>Nemetheria</i> from the upper part of the group, suggest an age range from Albian to Cenomanian. Zircon fission-track dating of the lower and upper parts of the group yields ages of 106±9, 100.9±8.4, and 96.1±7.4 Ma, also indicating a range from Albian to Cenomanian. These data indicate that deposition of the Sasayama Group began about 30 Ma later than previously thought.

収録刊行物

  • 地質学雑誌

    地質学雑誌 116(5), 283-286, 2010

    一般社団法人 日本地質学会

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    130000413340
  • NII書誌ID(NCID)
    AN00141768
  • 本文言語コード
    JPN
  • 資料種別
    雑誌論文
  • ISSN
    0016-7630
  • NDL 記事登録ID
    10727825
  • NDL 雑誌分類
    ZM49(科学技術--地球科学--地質)
  • NDL 請求記号
    Z15-174
  • データ提供元
    CJP引用  NDL  J-STAGE 
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