number of downloads : 751

Open Date : 2007-04-12
2.53 MB
Author
Yokota, Shuichiro
Matsumura, Toshiaki
Shimauchi, Takeshi
Description
Structural relationship between the Triassic Nariwa Group and overlying Permian limestone blocks which have been believed to be portions of a nappe body,has been studied in Kawakami,central Okayama,Japan.Based on detail field mapping and observation in some large exposures,spatial distribution of these rocks and relations among them were obtained.The limestone blocks are concluded to be reworked deposits formed as basal conglomerate of the Cretaceaus Kanmon Group.Because,greenish volcanic rocks of the Cretaceous Kanmon Group seems to be lower than the limestone body stratigraphically as a whole.And both of them cover sandstone and shale beds of the Triassic Nariwa Group.Considering that there are many landslides in this area,low angle faults of the nappe structure are understoodto be such landslide planes formed just below the ground surface.
Journal information
島根大学地球資源環境学研究報告 17 , 31 - 47 , 1998-12-25
Publisher
島根大学総合理工学部地球資源環境学教室
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