島根大学地球資源環境学研究報告

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島根大学地球資源環境学研究報告 14
1995-12-25 発行

隠岐島後北東部中村地域に分布する時張山累層および郡累層の層序と構造

The Tokibaliyama Formation in the northeastem part of the Oki-Dogo Island
小島 健
小室 裕明
村上 久
ファイル
内容記述(抄録等)
The Tokibariyama Formation of the late Oligocene is divided into the Choshigawa Rhyolitic and Chikaishigawa Rhyolitic and Chikashigawa Andesitic Members in ascending order. The Choshigawa Rhyolitic Member consists mainly of pyroclasitc rocks intercalating some lake deposits−thin alternated beds of sandstone and mudstone−at the upper part.These deposits show a period of weak eruption.The Chikaishigawa Andesitic Member consists mainly of lavas and partly of pyroclasitc rocks. Namely,andesitic lavas flowed out after the explosive eruption of rhyolitic magma.
NCID
AA11455176