| 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 | Volgian | USSR(Siberia) | Vakhrameev,V.A. et al. Paleobotanical data and the Jurassic-Cretaceous boundary. | 1975 | |
| details | Liassic | USSR(WSL) | Golbert,A.V. et al. Paleolandscapes of West Siberia in Jurassic, Cretaceous, and Paleogene. | 1968 |