On deglaciation between Pieksämäki and Pielavesi in central Finland

Abstract

On the basis of four end moraine formations, some of them not known before, the phases of deglaciation between Pieksämäki and Pielavesi in central Finland have been described in this paper. The trend of these end moraines, other transverse formations and radial eskers show that the ice retreated northwestward on quite an even front. The orientation of these end moraines bear witness to small oscillations and stagnations of the ice during general deglaciation. On the map (App. 1) have been marked the end moraines and radial eskers. On the basis of the trend of the end moraines, the general orientation of the retreating ice margin was drawn on the map of deglaciation (Fig. 6). The directions of striae and radial eskers, running quite a right angle to the trend of the retreating ice margin, were also used to determine the stages of deglaciation. Wherever there were no end moraines, the lines of deglaciation were drawn only on the basis of the trend of the radial eskers.