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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 | Kungurian | USSR(Komi ASSR) | Chalyshev,V.I. et al. The boundary of the Permian and Triassic in the Red-Colored deposits of northern Priural | 1965 | |
| details | Ufimian | USSR(Komi ASSR) | Chalyshev,V.I. et al. The boundary of the Permian and Triassic in the Red-Colored deposits of northern Priural | 1965 | |
| details | Early Kazanian | USSR(Orenburg) | Gayazova,A.L. Spore-pollen complexes from the Lower Kazanian deposits of the Orenburg District. | 1974 |