Fig. 9From: “Volcanism in the Chugoku region: a review for the first UNESCO field school on Geoenvironmental disaster reduction”Deposits from a pyroclastic density current of the lower Miocene Koura formation. Notice abundant armored lapilli in the basal part of the section, a vaguely stratified pumice rich central part and several fining upward subsets in the topmost part (pencil-tip)Back to article page