Geomorphology of river valleys at North-East Vietnam

Abstract

Main river valleys of the North-East Vietnam, i.e. valleys of Kau, Luknam, Thyong, Hakoi, Kalong and others are alike in structure and in the history of development. River terraces are connected with sea terraces and are dated on the basis of this correlation as well as on the spore-pollen analysis data. Their age ranges between Holocene and Early Pleistocene.