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Author - title
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| details | Late Eocene | Early Oligocene | Kazakstan | Krasheninnikov,V.A. et al. Reference sections of the Eocene - Oligocene boundary strata on the territory of the former Soviet Union. The Kiin - Kerish Section (the Zaisan Lake Depression, southeastern Kazakhstan). (In: Late Eocene-Early Oligocene geological and Biotical events on the Territory of the Former Soviet Union.Part 2: the regional geology of the Upper Eocene and Lower ligocene. V.A.Krasheninnikov and M.A.Akhmetiev, editors) | 1996 |
| details | Early Tertiary | Arctic Ocean | Zaklinskaya,E.D. Paleogene flora of the Novosibirsk Islands based on palynological data. | 1980 |