About OIKAWA TERUKI
About 産業技術総合研 地質情報部門
About SASAO EIJI
About 日本原子力研究開発機構
About HOSHINO YASUHARU
About 東北大 植物園
About radiocarbon dating
About wood fossil
About historical development of landform
About fluvial terrace
About Nagano prefecture
About river
About stratum
About 梓川
About gravel bed
About Quaternary
About Dating
About Physical geography
About 長野
About 梓川
About 上流
About 谷
About 分布
About 礫層
About 材化石
About 年代