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Siberia, in the context of paleocontinents, refers to a landmass that existed during the Silurian Period, oriented differently from its present-day alignment. This ancient continent, Siberia, was situated in the northern middle latitudes, separated from another landmass called Baltica by the Pleionic Ocean. A large platform sea extended southward from Siberia. Neighboring Siberia to the east was another continent known as Kazakhstania. In more equatorial positions were the separate continents of North China and South China. Unlike Siberia and Kazakhstania, most of North and South China were above sea level during this period.1

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