About TAKAHASHI MASAKI
About KIKUCHI MASAYUKI
About ORITO KOICHI
About YASUI MAYA
About KANAMARU TATSUO
About TAKEMOTO HIROYUKI
About 日本大学文理学部自然科学研究所研究紀要
About chemical composition
About volcano
About debris flow
About pyroclastic flow deposit
About X-ray fluorescence analysis
About decay
About volcanic product
About Nagano prefecture
About Gunma prefecture
About volcanic rock
About debris avalanche
About sector collapse
About Mt. Asamayama volcano
About whole rock chemical composition
About Volcanic geology in general
About 黒
About 斑
About 火山
About 大規模
About 山体崩壊
About 堆積物
About 岩
About 化学組成
About 分析
About 起源