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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 | Middle Visean | USSR(Permsk Oblast) | Burilova,R.V. et al. Detailed Division of the Lower Part of the Visean Stage. (In: Type sections of the Carboniferous of the Urals.) | 1979 | |
| details | Late Tournaisian | USSR(Permsk Oblast) | Burilova,R.V. Stratigraphy of Visean terrigenous deposits of the Southern Part of the Kizelov Region. (In: Type sections of the Carboniferous of the Urals.) | 1979 |