Bleik, on the island of Andøya has the longest sandy beach (3 km) of Norway. Behind this beach lies a terminal moraine, a glacial till that was left behind by the ice sheet during the last Ice Age. Bleik is situated on one of the few extreme points of Norway that were not fully covered with land ice during this ice age. Terminal moraines are formed at the edges of glaciers. Towards this point, all the debris that is collected by the pulling and scraping of the ice, is pushed forward and dumped on a heap. The moraine marks the end of the ice and because the glacier behaves very much like a conveyor belt, the longer it exists, all the greater the quantity of the deposited material will be.