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| details | Middle Jurassic | Early Cretaceous | USSR(Buryat ASSR) | Koleshikov,C.M. Stratigraphy of Mesozoic Coal deposits. (In: The History of Upper Mesozoic Coal Accumulation in the Territory of Buryat ASSR and the Southeast Part of the Lensk Basin.) | 1963 |
| details | Middle Rhaetian | Late Rhaetian | USSR(Chelyabinskaya) | Zakharevich,A.N. On the Size and age of the Sygoyaksk Suite of the Chelyabinsk Basin. (In: New data on the Triassic stratigraphy of the Paleo-Urals. V.I. Tuzikova and G.N. Papulov, editors) | 1980 |