Abstract
From the numerous shore profiles represented along the pacific coast of north-eastern. Japan we can read the crustal movements that have affected these regions.
It was not only. once that the land rose and sank. The depth of submergence of this region, that is, of an ancient river mouth, was measured from a point, in reference to which the profile of the bay bottom changes its angle of inclination. Besides policyclic crustal movements there were differential movements. While one region had upheaved in a straight line by mere tilting, another had deformed in a series of elevations and depressions, resulting in a wavy surface, at the junction of which two forms of crustal movements the existence of a flexure axis may be inferred.
In this paper, the coastal profiles of the northern half of the Kitakami district and the sea bottom profiles, or their differentiated curves, alone are given.
