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
Poland–Ukraine border of Poland-Russia, Poland-Lithuania, Poland-Belarus and Poland-Ukraine borders. Poland and Ukraine have confirmed the border on 18 May 1992. It is the longest of Polish eastern borders. The border became much more open compared to the Soviet times, when despite being part of the Eastern Bloc, crossing was very difficult. As the border was opened to mass traffic, the number of people crossing the Polish-Ukrainian border begun raising steadily since 1990, stabilizing around 2000s. Approximately 3 million Ukrainians crossed the border in the 1990s, annually. One of the peak numbers was recorded in 2001, with about 12 million people crossing the