Geology of Finland subsequent uplift and erosion would have eroded all of these sediments. In Finland, Caledonian nappes overlie shield rocks of Archean age. Despite occurring in about the same area the Scandinavian Caledonides and the modern Scandinavian Mountains are unrelated. The ice sheet that covered Finland intermittently during the Quaternary grew out from the Scandinavian Mountains. By some estimates the Quaternary glaciers eroded away on average 25 m of rock in Finland, with the degree of erosion being highly variable. Some of the material eroded in Finland has ended up in Germany, Poland, Russia and the Baltic states. Ground till left by
Borders of Finland Haapasaari, Helsinki, Hanko, Åland, Saimaa Canal. Border controls on land exist only on the Russian border. See Finland–Russia border. The only permanent border control on airports is on the Helsinki airport (although occasional controls can take place for charter flights on other airports). Borders of Finland The borders of Finland are the dividing lines between it and the neighbouring countries of Norway, Russia and Sweden. The border between Norway and Finland is 736 kilometers (457 mi) long. It is a land and river border between two tripoints. The western tripoint is marked by Treriksröset, a stone cairn where both countries