About AOKI KAORI
About 立正大 地球環境科学
About IRINO TOMOHISA
About 北大 大学院地球環境科学研究院
About OBA TADAMICHI
About pyroclastic material
About stratigraphy(sequence of layers)
About chemostratigraphy
About Pleistocene Epoch
About Northwest Pacific Ocean
About sea bed
About boring core
About rock description
About volcanic glass
About major element
About tephrochronology
About 火山灰層序
About 海底コア
About 酸素同位体層序
About Kashima-nada Sea
About Quaternary
About Volcanic rocks
About 海底コア
About 後期更新世
About テフラ層序