岡山県川上町における成羽層群の微小屈曲構造と地すべり移動の痕跡

島根大学地球資源環境学研究報告 Volume 20 Page 143-152 published_at 2001-12-28
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Title
岡山県川上町における成羽層群の微小屈曲構造と地すべり移動の痕跡
Title
Micro folds of the Triassic Nariwa Group and old shallow slides on slopes in the Kawakami area,Okayama,Japan
Title Transcription
オカヤマケン カワカミチョウ ニ オケル ナリワ ソウグン ノ ビショウ クッキョク コウゾウ ト ジスベリ イドウ ノ コンセキ
Creator
Sugiyama Terumasa
Source Title
島根大学地球資源環境学研究報告
Volume 20
Start Page 143
End Page 152
Journal Identifire
ISSN 13439774
Descriptions
Hill slopes in the Kawakami area,Okayama are known to be susceptible to landslide.The slopes consist of the Triassic Nariwa Group,which contains thin coal layers.Dips and strikes of the Nariwa Group change from place to place,and because of this complicated structure,many recent surface landslides overlap on tectonically deformed structures.
Characteristic minor folds of alternating beds of sandstone and mudstone are well recognized on hilly slopes.They are regarded as structures formed by surface sliding.These have following configurational characteristics:they tend to appear in restricted layers,have close folds,and axial planes of folds are almost horizontal.Based on the topographic situation that slopes containing minor folds are deeply eroded,they are regarded as remnants of old structures.Gently dipping bedding planes of minor folds may have influenced recent landsliding on slopes by forming potential sliding planes.
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学総合理工学部地球資源環境学教室
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
Date of Issued 2001-12-28
Publish Type Version of Record
Access Rights open access
Relation
[NCID] AA11455176
Remark 12-14,16+ / 1993+