北海道,網走・北見・津別地域の地すべり(第3報) : 端野地域での地すべり地形の特徴と最近の地すべり

概要

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A total of 170 landslide configurations were recognized from aerial photographs in the topogrophic map (1: 50,000) of Tanno. Most of them are found sporadically in the northwestern mountainous areas, which consist of the Jurassic to Cretaceous Nikoro Group， and in the central hilly areas，which consist of the Miocene Toika Formation. In the areas of the Nikoro Group， landslide configurations show morphology of small -scale debris slide(F type)on the base of steep slope and debris slump (A type)on the nearby gentle slope ridge. In the areas of the Toika Formation, most landslide configurations show mophology of small scale debris slump (A type)and debris slide(F type)on dip-slope. Moreover, largescale rock slump (B type)and slide(E type)are also found along the faults and axis of a fold. Some recent landslide damages and landslides with main scarp lacking in vegetation are caused by partial or complete re-sliding of older landslide debris.
北見工業大学の論文