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| details | Kazanian | Russian Platform | Koloda,N.A. et al. Analogue of the Ufimian, Kazanian and Tatarian Stages of Russia in North - Western China based on miospores and bivalves. | 1996 | |
| details | Tatarian | Russian Platform | Koloda,N.A. et al. Analogue of the Ufimian, Kazanian and Tatarian Stages of Russia in North - Western China based on miospores and bivalves. | 1996 |