群馬県富岡地域, 中新世北村・馬場凝灰岩のK-Arおよび40Ar-39Ar年代:とくに浮遊性有孔虫化石帯のN.13/N.14境界に関連して

高橋 雅紀; 齋藤 和男; 梅津 浩之; 市川 なつみ

doi:10.5575/geosoc.98.323

The Journal of the Geological Society of Japan

Online ISSN : 1349-9963
Print ISSN : 0016-7630
ISSN-L : 0016-7630

K-Ar and⁴⁰Ar-³⁹Ar ages of the Miocene Kiocene Kitamura and Baba Tuffs in the Tomioka area, Gunma Prefecture, central Japan:with special reference to the N.13/N.14 boundary of planktonic foraminiferal zones

Masaki Takahashi, Kazuo Saito, Hiroyuki Umetsu, Natsumi Ichikawa

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Keywords: Globigerina nepenthes

JOURNAL FREE ACCESS

1992 Volume 98 Issue 4 Pages 323-335

DOI https://doi.org/10.5575/geosoc.98.323

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