Abstract
Many landslides with Neogene siliceous mudstone beds in Tohoku district are characteristically observed in the form of largescale weathered-rock slide or bedrock slide. The main purpose of this study is to clarify the anomalous sedimentary structure of the siliceous mudstone beds distributed around Ou mountains and Yokote basin, and to identify if there exists any relationship between landslide occurrence and such structural formation. We added a new observation result to the previous researches done by Abe et al.(1994) and Abe (1996). It was verified that the anomalous sedimentary structure of the siliceous mudstone formation was mainly formed by marine slumping at the time of piling up of Sannai-formation layers . Moreover, stratum of the mountain range is found to be characterized by remarkable crushing. It was clarified that the main cause of landslide in the mountain range was the existence of ‘weak stratum’ according to the anomalous sedimentary structure of the siliceous mudstone formation . Since these types of landslide do not often exhibit clear surface topography, analysis of underground sedimentary structure becomes important for the forecast of these landslides.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
