Abstract
Palynological samples, plant megafossils, and fossil wood taken from the upper Lipovtsy Subformation (Porechye open-pit coal mine in the Il’ichevka coalfield, Razdol’naya River Basin, southern Primorye), as well as coal samples for determining coal-forming plants from dispersed cuticles are analyzed. The taxonomic composition of the identified palynomorphs from the coals and interstratal clastic sediments indicates the Aptian age of host deposits. The palynological spectra from the lower humic–rhabdopissite coal seam are dominated by Gleicheniaceae and Cyatheaceae accompanied by Dicksoniaceae and Ginkgocycadophytus. In the palynological spectra from the upper coal seam, the share of Gleicheniaceae substantially decreases, though they remain dominant; simultaneously, single angiosperm pollen grains appear in them. The spectra from the clastic rocks are dominated by Polypodiaceae and Cyatheaceae. The taxonomical composition of the gymnosperms is relatively diverse, although their abundance is low. The share of angiosperms increases with respect to both their diversity and abundance. The angiosperm pollen, found for the first time in the Aptian deposits of the Razdol’naya River Basin, provides grounds to assume that these pants appeared earlier than previously thought (early Albian). The coal-forming plants of the Il’ichevka coalfield are determined.
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Original Russian Text © T.A. Kovaleva, V.S. Markevich, E.V. Bugdaeva, E.B. Volynets, M.A. Afonin, 2016, published in Tikhookeanskaya Geologiya, 2016, Vol. 35, No. 1, pp. 54–65.
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Kovaleva, T.A., Markevich, V.S., Bugdaeva, E.V. et al. New data on palynostratigraphy of the Lipovtsy formation in the Razdol’naya coal Basin (Southern Primorye). Russ. J. of Pac. Geol. 10, 50–62 (2016). https://doi.org/10.1134/S1819714016010061
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DOI: https://doi.org/10.1134/S1819714016010061