About SHIRAI Masaaki
About Tokyo Metropolitan Univ.
About OMURA Akiko
About Univ. Tokyo
About Geographical Reports of Tokyo Metropolitan University
About rate of sedimentation
About reservoir(water)
About lead isotope
About ocean basin
About Northwest Pacific Ocean
About abyssal sediment
About dam reservoir
About lead-210
About Kumano basin
About Kumano-nada Sea
About Sedimentology in general
About Isotope geology
About 深海
About 堆積環境
About ダム貯水池
About 熊野灘