Stratigraphy and detailed age of the Upper Cretaceous Himenoura Group in the eastern part of Amakusa-Kamishima Island, Kumamoto, Japan

DOI Web Site Web Site 6 Citations 30 References
  • Kojo Yuki
    Graduate School of Science and Technology, Kumamoto University
  • Komatsu Toshifumi
    Graduate School of Science and Technology, Kumamoto University
  • Iwamoto Tadataka
    Graduate School of Science and Technology, Kumamoto University
  • Takashima Reishi
    The Center for Academic Resources and Archives Tohoku University Museum, Tohoku University
  • Takahashi Osamu
    Department of Astronomy and Earth Sciences, Tokyo Gakugei University
  • Nishi Hiroshi
    The Center for Academic Resources and Archives Tohoku University Museum, Tohoku University

Bibliographic Information

Other Title
  • 天草上島東部に分布する上部白亜系姫浦層群の層序と詳細な地質年代
  • アマクサ カミシマ トウブ ニ ブンプ スル ジョウブ ハクアケイ ヒメノウラ ソウグン ノ ソウ ジョ ト ショウサイ ナ チシツ ネンダイ

Search this article

Abstract

The Upper Cretaceous Himenoura Group is exposed in the eastern part of the Amakusa-Kamishima Island, Kumamoto, Japan, where it is divided into the Hinoshima and Amura Formations, in ascending order. Inoceramids, ammonoids, and microfossils (e.g., radiolarians and foraminifers) are abundant in this area. The Hinoshima Formation yields Dicarinella canaliculata and abundant Marginotruncana pseudolinneiana (foraminifers), Inoceramus amakusensis (inoceramid), and Texanites kawasakii (ammonoid), indicating a Santonian age. The Amura Formation yields a Campanian foraminifera assemblage composed mainly of Grobotruncana linneiana and G. cf. arca; these species are also abundant in the upper part of the Amura Formation. Therefore, the Santonian—Campanian boundary is probably situated in the lower part of the Amura Formation. In the Hinoshima and Amura Formations, the radiolarian assemblage is characterized by Amphipyndax stocki, Dictyomitra formosa, and D. koslovae, indicating the Santonian to Middle Campanian.

Journal

Citations (6)*help

See more

References(30)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top