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Author - title
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Year
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| details | Late Visean | Early Serpukhovian | Canada(NWT,Mackenzie) | Bamber,E.W. et al. A summary of Carboniferous and Permian biostratigraphy, Northern Yukon Territory and Northwest District of MacKenzie. (In: Current research Part G, Frontier Geoscience Program, Arctic Canada) | 1989 |
| details | Late Devonian | Carboniferous | USSR(Sverdlovskaya) | Aseeva,E.A. et al. Paleophytological characteristics of the rocks from the Gleevatskoi and Gdantsevskoi Suites of the Krivorozhskoistructure (Well from the Sverdlovskaya Region) | 1989 |