北海道, 日高地方南部の日高幌別川・元浦川における 第四紀後期の段丘形成過程

抄録

Fluvial terraces distributing extensively along the Hidakahorobetsu and Motoura Rivers in southern Hidaka, Hokkaido were investigated by the tephrochronological and geomorphological method to reveal their formative periods and processes. Based on the data obtained and on the river profile sreconstructed from terrace surfaces and the present river-bed, the change in the river response to sea-level and climatic change during the Late Quaternary was discussed, focusing on the period from 20 to 60 kyr.B.P.