About SATO YUICHIRO
About SUGIYAMA TETSUO
About 大分地質学会誌
About Oita prefecture
About limestone(rock)
About Hexacorallia
About Porifera
About animal fossil
About description of fossil
About Jurassic Period
About 佐伯市
About Mesozoic
About 大分
About 石灰岩
About サンゴ
About 海綿
About 化石
About 発見