About TAKAHASHI MASAKI
About YASUI MAYA
About KANAMARU TATSUO
About YAMASHITA DAISUKE
About 日本大学文理学部自然科学研究所研究紀要(Web)
About Gunma prefecture
About geological survey
About pumice
About chemical composition
About volcano
About trench investigation
About whole rock chemical composition
About Asama volcano
About Volcanic rocks
About 火山
About テフラ
About トレンチ調査
About 岩
About 化学組成
About マグマ