B. Papp szerk.: Studia Botanica Hungarica 35. 2004 (Budapest, 2004)

Erdei, B.; Bruch, A. A.: A climate analysis of Late Oligocene (Egerian) macrofloras from Hungary

nannozones in the Central Paratethys area is in most cases impossible. They also comment on the G. opima opima foraminifera zone, i.e. it is very probable that Paragloborotalia opima s.l. {Globorotalia opima) disappeared at the Kiscellian/ Egerian boundary. Therefore the original definition of the K/EB with the first appearance of Pgr. opima s.l. is erroneous (BÁLDI et al. 1999). Thus, considering the above we should not exclude that fossil plants of the Eger-Wind locality (the lower level, see later) may represent the upper part of the Kiscellian (Lower Chattian). Four members of the Eger Formation are clearly recognisable in the EgerWind brickyard the lowermost member of which (marine glauconitic and tuffitic sandstones) provides no macro flora. In the subsequent layers three flora levels are recorded. The lower level flora is yielded by molluscan clay with deep littoral to bathyal fauna (mentioned above as a possible Late Kiscellian flora), the middle level flora by the alternating clays and sandstone comprising a shallow marine fauna and finally the upper level flora (younger Egerian, but still the upper part of Oligocène) by coarse sand and intercalating clays (brackish and limnic), respectively (KVACEK and FlABLY 1991). The stratigraphical position of the lower and middle members are dated by nannoplankton as mentioned above. An additional fossil assemblage in Andornaktálya, in the close vicinity of Eger, is preserved in pelitic deposits of the Eger Formation. Lithologically the sequence is quite similar to the upper part of the Eger-Wind brickyard. The extremely poor nannoflora indicates an age not younger than Late Oligocène (NAGYMAROSY in VARGA et al. 1989). Localities in the Transdanubian Range (N Hungary) The Pomáz locality became known primarily for its mollusc fauna which promoted the stratigraphical revision of the fossiliferous strata (BÁLDI 1973). Plant remains are fossilised in fine grained clay (clayey coarse silt) indicating a lowenergy sedimentary environment (SZAKMÁNY in HABLY 1994). Fossiliferous layers belonging to the Many Sand Formation are dated by molluscs as Egerian (BÁLDI 1973) and according to its nannoflora (co-occurrence of Helicopontosphaera recta and Triquetrorhabdulus carinatus) placed to the NP25 zone (NAGYMAROSY pers. comm. in HABLY 1994). The Vértesszőlős locality was exposed in the course of a road construction. Fossiliferous layers comprising fossil plant remains, a nannoflora of low diversity and molluscs are sandstones with intercalating clay lenses (Many Sand Formation). Based on both the mollusc fauna (BÁLDI 1976) and its nannoflora (NAGYMAROSY pers. comm. in HABLY 1990) layers are attributed to the Egerian, to the