Rock avalanche in the northwestern face of Mount Mitou, west Tokyo

Yoshihiko Kariya; Chousei Shimizu; Koichiro Sawabe; Kuniyasu Mokudai; Go Sato

doi:10.14866/ajg.2013s.0_235

Annual Meeting of the Association of Japanese Geographers, Spring 2013

Session ID : P039

DOI https://doi.org/10.14866/ajg.2013s.0_235

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Host: The Association of Japanese Geographers

Abstract

Rock avalanche in the northwestern face of Mount Mitou, west Tokyo

*Yoshihiko Kariya, Chousei Shimizu, Koichiro Sawabe, Kuniyasu Mokudai, Go Sato

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Keywords: Rock avalanche, 14C age, Gravitational mass rock deformation , Disaster mythology

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Abstract

A rock avalanche feature having flow mounds and jigsaw crack deposits is present in the northwestern side of Mount Mitou, 70km west of Tokyo. This rock avalanche produced a natural dam in the valley bottom, resulting in formation of a small pond or a flood plain. Estimated volumetric magnitude and age of the deposits are 2*10^7 m^3 and 1292-1399 cal AD or before, respectively.

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