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
Postage stamps and postal history of Latvia Postal Service routes in Finland. In 1685 the Duke of Courland Friedrich Casimir initiated his own postal service and asked the Swedish authorities to cease their postal operations within his territory, but King Charles XI of Sweden ignored his request and stood for his rights in Courland. On 5 July 1710, Russian troops under the command of Tsar Peter I of Russia took over Riga and made it a part of the Russian Empire. During World War I, Latvia was occupied by Germany, and used German stamps overprinted by the Ober Ost. In 1919, German stamps were handstamped "LIBAU", but