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
Norway–Russia border There are restrictions on food import in both directions, especially meat, and alcohol may only be imported into Norway if staying in Russia more than 24 hours, so food and alcohol are less often traded, which otherwise are the most traded goods over the Sweden–Norway and Finland–Norway border. There are suggestions about a new larger border checkpoint to be built on the Norwegian side, as the current station has insufficient capacity to handle increased traffic, and the ground is not sufficiently stable to allow an expansion at the current site. Individual Norwegian police executives have called for a common border