Fig. 5

Isopachs of pyroclastic fall deposits (Ta-a, Ta-b, Ta-c, Ta-d, En-a and Spfa-1) in the vicinity of the study area based on Machida and Arai (2003), Furukawa and Nakagawa (2010) and Hirose et al. (2018). a Isopachs of Ta-a layer. b Isopach of Ta-b layer. c Isopach of Ta-c layer. d Isopach of Ta-d layer. e Isopach of En-a laer. f Isopach of Spfa-1 layer