Ural Ocean
small, ancient ocean between Siberia and Baltica; formed in the Late Ordovician epoch; began to shrink in the Devonian Period and became a seaway
en-US/ˈjʊɹəl ˈoʊʃən/
small, ancient ocean between Siberia and Baltica; formed in the Late Ordovician epoch; began to shrink in the Devonian Period and became a seaway