テフロクロノロジーによる徳島県神山町の高根地すべり,東大久保地すべりの発生時期の推定

概要

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In this study，tephrochronological ages of the Koune Landslide andthe Higashiohkubo Landslide in Kamiyama Town，Tokushima Prefecture，areestimated. The Koune Landslide is divided into two landslides; the PrimaryKoune Landslide and the Secondary Koune Landslide. The Primary KouneLandslide is cut by main scarp and moving mass of the Secondary Landslide.The Secondary Koune Landslide is overlain by the Kikai-Akahoya Tephra andre-sedimentation of the Aira-Tanzawa Tephra， suggesting that the landslideoccurred primarily between 7.3 ka and 26-29 ka. Therefore， the Primarylandslide is older than the Secondary one. The Higashiohkubo Landslide is notoverlain by the Aira-Tanzawa Tephra，but the Kikai-Akahoya Tepahra, suggestingthat the landslide occurred primarily between 7.3 ka and 26-29 ka.
徳島大学の論文