Tephro-and archaeo-chronology of the Kirikubo Landslide, northern Nagano Prefecture, central Japan

Abstract

The Kirikubo Landslide is a Late Pleistocene large-scale landslide in the northern Nagano Prefecture, central Japan. The Tateyama E Tephra Bed just conformably overlies the main slip scarp, suggesting that the Kirikubo Landslide occurred primarily at 60 to 75 Ka. Secondary smaller-scale landslide cut the primary landslide mass at 7 to 10 Ka, based on the age of archaeological site on the slide blocks.