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Author - title
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| details | Middle Jurassic | USSR(Yakut ASSR) | Pavlov,V.V. Age determination of the coal deposits in the area of the lower course of the Lepiske River, (Sangar area of the Lena Coal Basi), based on palynology. | 1957 | |
| details | Early Triassic | USSR(Yakut ASSR) | Skripina,G.F. Triassic spore-pollen assemblages of Middle Vilyuusk gas-containing deposits. (In: Palynological characteristics of the Paleozoic, Mesozoic and Cenozoic deposits of Vakutia. A.I.Tomskayiya and V.F.Vozin, editors) | 1971 |