Geoscience reports of Shimane University

島根大学総合理工学部地球資源環境学教室

ISSN:1343-9774

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Use this link to cite this item : https://ir.lib.shimane-u.ac.jp/6126

Geoscience reports of Shimane University 22

2003-12-27 発行

島根県桜江町八戸川流域に分布する漸新統桜江層群

Oligocene Sakurae Group around the Yato River,Central Shimane Prefecture,SW Japan

Ohmachi, Akiko

Komuro, Hiroaki

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c006022015.pdf 1.08 MB

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The Nakano Formation of the Oligocene Sakurae Group around the Yato River in the Shimane Prefecture，SW Japan，is divided into lower and upper parts which are correlated with the Kawado Tuff and Tazu Welded Tuff Members，respectively．The KawadoTuff Member is mainly composed of crystal tuff and contains intercalated rhyolite and andesite lavas．Consequently，this member could have been produced by a variety of eruption type．However，the Tazu Welded Tuff Member is charactenzed by a thick and widely distributed welded tuff，suggesting it was the production of a catastrophic eruption．

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