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Geolocation
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Author - title
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Year
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| details | Artinskian | USSR(Urals) | Samoilovich,S.R. Pollen and spores of Permian deposits of Cherdyn and Aktyubinsk in the Lower Urals. (In: Palaeobotanical Symposium) | 1953 | |
| details | Jurassic | USSR(Kazakh SSR) | Medvedeva,A.M. et al. Direct evidence for vertical oil migration in the eastern Precaspian. | 1993 |