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By Dobruskina I.A.
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Additional resources for Triassic Floras of Eurasia
It occurs most likely in the Upper Triassic but the exact horizon is unknown (KRASSER, 1919). In Hungary plant assemblages at Mecsek mountain are known only by preliminary determinations (KAGY, 1960 - list 23). A small part of Rhaeto-Liassic flora of Banat, Roumania in the Southern Carpathians should probably be referred to as Rhaetian (SEMAKA & GIVULESKU, ]965 - list 24 a). Lower Triassic plants from the Balkans (Stara Plan ina) are similar to those of other parts of the German Basin (PANTIP, ]960; KHARKOVSKA & TENCHOV, 1963 - list 25 a , 25 b).
Palynological assemblages described by Klaus from Upper Buntsandstein of the east and west banks of the Rhine are practically identical which correlates with the position of Gres a Voltzia in comparison with the plant-bearing horizons of Thiiringer Senke. Tetrapods of the Buntsandstein (chart 3*) are known from the Middle Buntsandstein, mainly from its upper part (Chirotheriensandstein, Soiling Formation) and from the Cpper Buntsandstein as used in the older literature. It is interesting that Upper Buntsandstein tetrapods are known only in the southern part of the basin both east and west of the Rhine, and that the Middle Buntsandstein tetrapods occur in the whole basin most abundantly in the northern part.
Rhaetavicula contorta is a guide fossil for the Rhaetian. Latest data of alpinian geologists demonstrates that the "Rhaetian" with Rhaetavicula contorta is of Middle Norain age (DOBRGSKINA , 1976 c). Megaspores are very important for the determination of the TriassicJurassic boundary. They have been studied in the sections of Sud Deutsche ~enke (WICHER, 1951 ; JUNG, 1960) and from the boreholes of the north-western part of Nord Deutsche Senke (WILL, 1969). I n the French part of the basin the Rhaetian consists of sandstone and shale with Rhaetavicula contorta (below) and the LevaIIois marl (above).
Triassic Floras of Eurasia by Dobruskina I.A.