Emplacement model of obsidian-rhyolite magma deduced from complete internal section of the Akaishiyama lava, Shirataki, northern Hokkaido, Japan

Keiji Wada, Hokkaido Univ. Education, Asahikawa, Japan and Kyohei Sano, Shirataki Geopark, Engaru town, 099-0111, Japan