About KANEKO TAKAYUKI
About SHIMIZU SATOSHI
About 服部鉱業
About ITAYA TETSUMARU
About 岡山理大 蒜山研
About potassium-argon dating
About Dating related to geochemistry
About Volcanic geology in general
About Ar
About 年代
About 高原
About 地域
About 火山活動