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Author - title
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Year
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| details | Late Eocene | USSR(Ukrainian SSR) | Zosimovich,V.Y. et al. The boundary between Upper Eocene and Oligocene in the Kiev Dnieper area as based on palynological data. | 1979 | |
| details | Late Oligocene | USSR(Ukrainian SSR) | Zosimovich,V.Y. A boundary of Oligocene and Miocene in the Boreal Province of the East-European Platform | 1991 |