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
Germany–Poland border at the Yalta Conference and Potsdam Conference. This border was a compensation to Poland for territories lost to the Soviet Union as a consequence of the Molotov–Ribbentrop Pact, and resulted in significant westward transfers of German population from the Recovered Territories, matching the Polish population transfers from the Kresy territories. It roughly matched the centuries-old, historical border between the Medieval Polish and German states. It divided several river cities into two parts – Görlitz/Zgorzelec, Guben/Gubin, Frankfurt (Oder)/Słubice, Bad Muskau/Łęknica. The border was recognized by East Germany in the Treaty of Zgorzelec in 1950, by West Germany in 1970 in the