埼玉県比企丘陵の中部中新統から産出した珪藻化石　　微化石年代による岩相層序の再検討

• 須藤 斎

• 高橋 雅紀

• 柳沢 幸夫

書誌事項

タイトル別名

• Diatom fossils of the Middle Miocene sequence in the Hiki Hills area, Saitama Prefecture, central Japan. Biochronologic re-examination of the lithostratigraphic division.
• サイタマケンヒキキュウリョウ ノ チュウブ チュウ シントウ カラ サンシュツ シタ ケイソウ カセキ ビカセキ ネンダイ ニ ヨル ガンソウソウ ジョ ノ サイケントウ

抄録

Marine diatoms occur in the Miocene marine sequence formally assigned to the lowest part of the Tsuchishio Formation distributed along the Arakawa River in the northern part of the Hiki Hills area, central Japan. Nineteen samples yield age diagnostic diatom fossils, which indicate the sequence belonging to the lower Denticulopsis lauta Zone (NPD 4A). The absence of both Denticulopsis praelauta and Cavitatus lanceolatus surely represents that the age of the investigated sequence is precisely placed between the last occurrence (LO) of D. praelauta (D41 : 15.7Ma) and the first occurrence (FO) of C. lanceolatus (D41.5 : 15.6Ma). This age-constraint requires the revision of the previously established stratigraphy of the extremely deformed Miocene series in this area, because the reported fission track ages are apparently inconsistent with the diatom chronology of this study.

収録刊行物

• 地質学雑誌

  地質学雑誌 108 (4), 266-278, 2002

  一般社団法人 日本地質学会

キーワード

• Japan

詳細情報

• CRID: 1390001206234644352
• NII論文ID: 110003013239
• NII論文ID: 10010351650
• NII書誌ID: AN00141768
• DOI: 10.5575/geosoc.108.266
• ISSN: 13499963
• ISSN: 00167630
• NDL書誌ID: 6148112
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6148112
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可