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| details | Kazanian | USSR(Leningrad) | Faddeeva,I.Z. Palynostratigraphy of Permian deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) | 1990 | |
| details | Bashkirian | Moscovian | China(Sinkiang Uighur) | Zhou,Y.-X. Earliest pollen-dominated microfloras from the Early Late Carboniferous of the Tian Shan Mountains, northwest China: Their significance for the origin of conifers and palaeophytogeography. | 1994 |