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Geolocation
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Author - title
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Year
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| details | Eocene | USSR(Siberia) | Aleksandrova,A.N. et al. Palynoflora of Central Siberia at the Eocene-Oligocene Border | 1985 | |
| details | Early Oligocene | USSR(Kazakh SSR) | Akhmeteev,M.A. et al. Upper Eocene Oligocene spore and pollen, plant macrofossils and phytoplankton in stratotypes of Tchegan and Astsheairyk Formations (North Usturt, Kazakhstan). | 1992 |