| link
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From
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To
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Geolocation
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Author - title
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Year
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| details | Permian | China(N.China) | Gao,L. et al. Spores and pollen. Carboniferous and Permian spores and pollen. (In: Paleontological Atlas of North China.III.Micropaleontological Volume.) | 1984 | |
| details | Kungurian | USSR(Kazakh SSR) | Kukhtinova,L.V. et al. Lower Permian palynocomplexes of the terrigenous deposits in the eastern Caspian Depression | 1990 | |
| details | Early Permian | USSR(Kazakh SSR) | Medvedeva,A.M. et al. Direct evidence for vertical oil migration in the eastern Precaspian. | 1993 |