Bulletin of the Graduate School of Education, Hiroshima University. Part. II, Arts and science education Issue 63
2014-12-19 発行

地域素材を活用した地学の学習(7) : 東広島市大芝島の高田流紋岩中にみられるスランプ構造

Geoscience Teaching Using Local Geological Materials (7) : Slump Structures in the Cretaceous Takada Rhyolites Distributed in Oshiba Jima Island, Higashi-hiroshima, SW Japan
Eto, Yuji
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abstract
In this paper, internal structure of slump beds distributed in Oshiba Jima Island, Higashi-hiroshima were described from a viewpoint of their form, and were considered in the context of teaching materials. The Oshiba Jima Island consists mainly of the H7 Rhyolite Member of Haigamine Formation of Cretaceous Takada Rhyolites. The slump beds were found out from the mudstone and tufaceous sandstone intercalated with welded tuff beds of the H7 Rhyolite Member. The form of asymmetric slump folds and thrusts on an outcrop are not difficult to describe. When used in combination of some analogue experiments, morphological characteristics of the slump beds have the potential to be a learning tool to improve the understanding of geologic structures.
description
本研究の一部に科学研究費補助金基盤研究(A)課題番号25242015および同基盤研究(C)課題番号26350235を使用した。
subject
Higashi-hiroshima
Oshiba Jima Island
Takada rhyolites
slump beds
teaching materials
東広島
大芝島
高田流紋岩
スランプ層
教材