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タイトルヨミ
シマネケン チュウブ マジ タカヤマ ヤタ キシロヤマ チイキ ニオケル オオエタカヤマ カザン フンシュツブツ ノ ガンソウ ブンプ ト ソレニ カンレンシタ シャメン ウンドウ
タイトル別表記
Lithofacies distribution of the Quaternary Oe-takayama Volcanic Products and related slope movements in the Maji-takayama to Yataki-shiroyama areas, Central Shimane, Japan
ファイル
言語
日本語
著者
木村 健志
田村 友紀夫
横田 修一郎
内容記述(抄録等)
 Field mapping of lithofacies distribution has been made to establish the volcanic stratigraphy of the Quaternary Oetakayama Volcanic Products in the Maji-takayama to Yataki-shiroyama areas, Central Shimane, Japan. The presence of at least three lava flow layers and three pyroclastic flow deposits were confirmed in the areas. With the exception of the lowest unit, the lavas and flow deposits are not continuous, and lateral change of lithofacies is remarkable. Fluvial gravels with thin tuffaceous silt layers also frequently occur, in addition to tuff breccias. Considering that the gravels are characterized by abundant dacite fragments, these may be correlative with the Shimano-hoshi Formation in the Gotsu area.
 The area is characterized by various slope movements including toppling, translational sliding, and debris avalanches. These movements occur not only on steep slopes on dacite, but also on varying slopes in other lithofacies. Especially, thin silt layers interbedded with tuff breccias sometimes cause local landslides because they are kinetically weak layers with impermeable properties. Consequently, the types of slope movements strongly depend on the lithofacies and slope structures in the areas.
掲載誌名
島根大学地球資源環境学研究報告
28
開始ページ
11
終了ページ
25
ISSN
13439774
発行日
2009-12-25
NCID
AA11455176
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
部局
(旧組織)大学院総合理工学研究科
備考
12-14,16+ / 1993+
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