Abstract
The River Hei flows to the east across the central part of Kitakami Mountains and debouches in its lower course into the embayed Miyako Lowland. In the middle course, the river makes incised meandering. A section cut into a slip-off slope of a meander shows a sequence of down-stream migration of the bending and accompanying deposition of fluviatile and subaerial sediments (see illustration). The fluviatile sediments are red; such materials are found in residual form both in the mountains and on the terraces along Sanriku coast.
Such paleopedological data are useful for the study of the chronological relation of the incised meandering in the mountains with the coastal terrace formation and the evolution of the mountain landscape.
