Preliminary report on the radiolarian age of the Upper Cretaceous Matoya Group (Shimanto belt) in the Toba District, Mie Prefecture, Southwest Japan

DOI Web Site Web Site 2 Citations 37 References
  • Nakae Satoshi
    AIST, Geological Survey of Japan, Research Institute of Geology and Geoinformation
  • Kurihara Toshiyuki
    Graduate School of Science and Technology, Niigata University

Bibliographic Information

Other Title
  • 三重県鳥羽地域における上部白亜系的矢層群（四万十帯）の放散虫年代：予察報告

Search this article

Abstract

<p>A detailed field mapping and radiolarian dating in the Toba District, the Shima Peninsula (eastern tip of the Kii Peninsula) have revealed Coniacian–Campanian mudstones of the Upper Cretaceous Matoya Group. This group belongs to the Shimanto belt (northern subbelt) that formed along the plate boundary where the Kula plate has been subducting beneath the paleo-Asian continent. Seven out of 51 radiolarian-bearing samples from different outcrops of mudstone yield relatively well-preserved radiolarian assemblages, which are concentrated in three age-groups: (i) Early Coniacian, (ii) Early Campanian or Middle Santonian–Middle Campanian, and (iii) Middle–Late Campanian. This evidence has a potential to chronologically and stratigraphically divide the Matoya Group into several units.</p>

Journal

Citations (2)*help

See more

References(37)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top