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Geolocation
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Author - title
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Year
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| details | Santonian | USSR(WSL) | Filippova,E.A. Santonian. (In: Stratigraphy of Mesozoic and Cenozoic Periods of Western Siberian Lowland. E.A.Filippova, editor) | 1957 | |
| details | Cenomanian | USSR(WSL) | Voitsel,Z.A. et al. Cretaceous spore and pollen assemblages of Western Siberian Lowland. | 1957 | |
| details | Jurassic | England(Yorkshire) | Harris,T.M. The investigation of a fossil plant | 1956 |