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| details | Middle Eocene | Early Oligocene | Russia(Kaliningrad) | Vialov,O.S. et al. Region I. The Western Russian, (East European), Platform, (Lithuania, Byelorussia and Kaliningrad Region of Russia). (In: Late Eocene-Early Oligocene geological and Biotical events on the Territory of the Former Soviet Union.Part 1: The regional geology of the Upper Eocene and Lower Oligocene. V.A.Krasheninnikov and M.A.Akhmetiev, editors) | 1996 |