The famous Lågøystolane consist of large glacial erratics of conglomerate resting on bedrock that originally formed on the seafloor, that is, on what was once oceanic crust. The erratics were transported here by the ice during the last Ice Age, about 12,500–11,600 years ago. When the glacier melted and retreated, the large stones were left behind in the landscape.
Their location just north of Steinsundøyna suggests that the blocks belong to the same moraine ridge. They are probably part of the Younger Dryas moraine, which formed when the ice front stood still in the area towards the end of the Ice Age.
