MODIFICATION OF PALYNOFLORA IN THE MOSCOW SYNECLISE AT THE PERMIAN-TRIASSIC BOUNDARY

Three microfloral assemblages are distinguished among palynomorphs occ urring in Upper Permian (Vyatka Horizon) and Lower Triassic (Vokhma Ho rizon) terrestrial deposits of the Moscow syneclise. One of them, typi cal of the middle Vyatka Horizon (Luptyug Member), is distinct from an other, confined to Lower Triassic beds of the Vokhma Horizon, whereas the third one, occurring in the upper Vyatka beds (Moloma Member), is transitional in composition. The data obtained suggest that a hiatus i n sedimentation corresponding to the boundary epoch between the termin al Permian and earliest Triassic did not have identical time spans in different areas of the Moscow syneclise. According to the character of palynoflora and associated vertebrate fauna, it was minimal in the Ve tluga River basin. The paper is supplemented with a description of the new pollen species Ephedripites permasensis Yaroshenko sp. nov. colle cted from the Krasnye Baki Subformation of the Vokhma Horizon.