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–Russia border a majority of the individuals crossing the borders did so for the explicit purpose of short term (usually under one day) shopping; this was the case with 45% of foreigners entering Poland, and 87% of Poles entering Russia. Compared to traffic on other non-EU Polish borders, a much larger percentage (22% foreigners and 7% Poles) crossed the borders for the purpose of tourism and transit (16.5% foreigners). Because Kaliningrad Oblast is small, homogeneous and an exclave within the European Union, in 2011 the whole Oblast was granted the status of border area eligible to local border traffic rules. In reciprocity,