Sarkaslampi bedrock topography

The rocky areas of Ristilampi and Sarkaslampi are dominated by scarps rising 30-50m above the water and the valleys between the scarps, which illustrate the passage of fault and fracture zones in the area’s bedrock. The main type of rock in the bedrock is garnet-rich mica gneiss containing veins of granite, with larger areas of granite in some places.