About YASUI Maya
About Nihon Univ., Tokyo, JPN
About 日本大学文理学部自然科学研究所研究紀要
About volcano
About volcanic product
About pyroclastic material
About gravel
About eruptive activity
About macrostructure
About micro structure
About fragment
About pyroclastic flow deposit
About aggregation
About bonding and joining
About vulcanian eruption
About lapilli
About Mt. Asamayama volcano
About microstructure
About anastomosis
About ignimbrite
About Volcanic geology in general
About 火山
About 噴出物
About テクスチャ
About 噴火
About プロセス