Radiolarian biostratigraphy from the Neogene Kuromatsunai Formation in the Imakane area, southwestern Hokkaido, Japan

• Itaki Takuya

  Department of Earth and Planetary Science, University of Tokyo

• Nojo Ayumu

  Department of Science Education, Iwamizawa College, Hokkaido University of Education

Bibliographic Information

Other Title

• 西南北海道今金地域の新第三系黒松内層から産出した放散虫化石による生層序年代
• セイナン ホッカイドウ イマ カネチイキ ノ シン ダイ3ケイ クロマツ ナイソウ カラ サンシュツ シタ ホウサンチュウ カセキ ニ ヨル セイソウ ジョ ネンダイ

Abstract

Depositional age of the Kuromatsunai Formation was examined on the basis of biostratigraphic study of Neogene radiolarians in the Imakane area, southwestern Hokkaido, Japan. Three radiolarian biozones, the Lithelius barbatus Zone (6.8-5.6 Ma), the Stylacontarium acquilonium Zone (5.6-5.2 Ma), and the Spongurus pylomaticus Zone (5.2-4.2 Ma), were recognized from the Sumiyoshi Siltstone Member of the formation. The lowest and the upper most parts of the member were correlated to the middle part of the L. barbatus Zone (ca. 6 Ma) and the base of the S. pylomaticus Zone (5.2 Ma), respectively.

Journal

• The Journal of the Geological Society of Japan

  The Journal of the Geological Society of Japan 110 (5), 325-328, 2004

  The Geological Society of Japan

Keywords

• Kuromatsunai Formation
• Imakane
• southwestern Hokkaido
• Neogene
• Radiolaria
• biostratigraphy

Details

• CRID: 1390001206238407296
• NII Article ID: 110003009854
• NII Book ID: AN00141768
• DOI: 10.5575/geosoc.110.325
• ISSN: 13499963
• ISSN: 00167630
• NDL BIB ID: 6967350
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6967350
• Web Site: https://www.jstage.jst.go.jp/article/geosoc/110/5/110_5_325/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed