About SHIRAI MASAAKI
About HAYASHIZAKI RYO
About UTSUGAWA TAKAKO
About OMURA AKIKO
About rate of sedimentation
About sedimentary environment
About amount of sediment
About lead isotope
About Sea of Japan
About submarine sediment
About pelagic sediment
About dam lake
About lead-210
About 20th century
About Marine geology
About 日本海
About 新潟
About トラフ
About 採取
About コア
About 20世紀
About 堆積速度
About ダム湖
About 環境