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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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| original | Middle Albian | Early Cenomanian | Colorado | Pannella,G. Palynology of the Dakota Group and Graneros Shale of the Denver Basin. | 1966 |
| original | Valanginian | Senonian | USSR(WSL) | Krasnova,L.M. et al. Selaginellaceae. (In: Pyltsa i spory zapadnoi Sibiri, yura-paleotsen. S.R.Samoilovich and N.D.Mtchedlishvili, editors) | 1961 |