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
Finland–Russia border In 1947, Finnish trains were allowed to pass through the base, but the passenger car windows were blinded and locomotive replaced while crossing through. Earlier between 1940–41, Soviet Union had rented Hanko Peninsula as a military base. Apparently there was also a border crossing to the exclave at the time. In 2015, 9.1 million individuals crossed the border, half of which through Vaalimaa and Nuijamaa. Finland is the country that issues the most Schengen visas to Russians. On 26 November 1939, the Soviet Union's Red Army shelled the Russian village of Mainila, and blamed Finland. The Soviets used this false