suppa

Riuttanloko are narrows typical of ridge periods. Supa were born during the ice age during the melting phase of the continental glacier. When the glacier melted, ice blocks of different sizes came off its edge and were buried in the soil (ridges) accumulated by the glacial rivers. As the block of ice slowly melted, a hole the size of the block appeared in its place. Supa often occur in flocks, forming suppa terrains or suppa valleys. Often, the bottoms of the deepest ditches, which reach below the groundwater level, are swamped or have ponds with clear water. The area of ​​Riuttanlukku includes the suppa area between Riuttanmäki, Hiivolannummi and Hanhisuo, where there are large, steep suppa valleys. Riuttanlukku's deepest pit is the pit of the skiing slope shown in the picture, with a height difference of 40 meters on both sides of the slope.