Development of gravitational rock deformation and its related landforms on the Hounose-dendeiro Ridge, the upper Tama River Basin

Yoshihiko KARIYA; Koichiro SAWABE; Chosei SHIMIZU; Hiroshi KUROSAWA

doi:10.14866/ajg.2014s.0_100042

Annual Meeting of the Association of Japanese Geographers, Spring 2014

Session ID : P006

DOI https://doi.org/10.14866/ajg.2014s.0_100042

Conference information

Host: The Association of Japanese Geographers

Abstract

Development of gravitational rock deformation and its related landforms on the Hounose-dendeiro Ridge, the upper Tama River Basin

Yoshihiko KARIYA, *Koichiro SAWABE, Chosei SHIMIZU, Hiroshi KUROSAWA

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Keywords: Linear depression, Toppling, Buckling, Tephra, 14C age

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Abstract

Development of gravitational rock deformation and its related landforms on the Hounose-dendeiro Ridge, the upper Tama River Basin, 100 km west of Tokyo, are discussed. Toppling and buckling of bedrock (sedimentary rocks of the Shimanto belt) and the resultant formation of gravitational faults and linear depressions are described. Timing of these deformations is also discussed by using tephrochronology and radiocarbon dates.

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