Along the eastern half of the northern shore are terraces of pebble and shingle sloping steeply to the lake but level on their surfaces. At their base there is a strip of swampy ground with grass. The lake seems to have been formed by the action of the prevailing eastern wind which has dammed up the broad mouth of the valley which morphologically is the continuation of the Kalema. It is the threshold of sand brought thither by the wind that has given origin to the lake basin. Signs of glacial action are not visible here, and the blocks seen at some places have fallen down from the rocks above. As pointed out before, the slopes of the hills, especially those south of the lake, are covered with a thin layer of sand.
IIIFカラー高解像度
