Kilonniemi gneiss outcrop

The gneisses of the Lake Oulujärvi belong to the oldest bedrock area of the EU. They have crystallised deep under an ancient mountain range. The mountains formed in a collision of Earth´s early continents. At that time the Earth´s atmosphere was lacking oxygen, and primitive cyanobacteria living in oceans were the most developed form of life. You can explore gneisses for example in Kilonniemi on Manamansalo island.