L. Hably szerk.: Studia Botanica Hungarica 20. 1988 (Budapest, 1988)

Hably, Lilla: Egerian fossil flora from Kesztölc, NW Hungary

S T U D ï A XX. BOTANICA HUNGARICA (An

tea: Fragmenta Botanica) 1938 p. 33-61 Egerian fossil flora from Kesztölc, NW Hungary By L. HABLY (Received October 30, 1987) Abstract: A taxonomic analysis, palaeoecological and palaeoclimatological reconstruction of a Hungarian Egerian flora are given. With 98 figures and 10 plates. An outcrop containing palaeofloristic evidence can be found south of the village of Kesztölc, in bank of a streambed. This outcrop has been already mentioned by SCHRÉTER (19 53), who published altogether 7 Mollusca species from here. The geological section of the outcrop, as well as a comprehensive presentation of the Molluscan fauna has been given by BALD I (1973) and completed by LEÉL-ŐSSY (1984) for the upper strata (Figs 1 and 2). The sequence of the outcrop, according to BÁLDI (1973), is the following from the bottom upwards : 1. 2 m of coarse sand. 2. 50 cm of shaly clay with leaf imprints and brown coal stringers. 3. 2 m of cross-stratified coarse sand with clay pebbles, and with a Polymesoda-Tympanotonus community (

Ostrea cyathula

, Polymesoda convexa

, Teredo sp.

, Melanopsis impressa hantkeni

, Pirenella plicata

, Tympanotonus margaritaceus

, Theodoxus pictus

). 4. 1.5 m of cross-stratified coarse sand with very scarce fossils. 5. 30 cm of shaly clay with plant fossil impressions (

Cinnamomophyllum)

. 6. 1 m of coarse sand with a thin band of clay containing plant fossil imprints. 7. 2 m of shaly-lamellar fine-grained sandstone. An unexposed section of 8 m height is succeded by 8. 1 m of coarse-grained sandstone with fine pebbles and molluscs, 9. 2 m of sand with scarce fossils, 10. 2 m of coarse sand, locally with small pebbles, with abundant fossils at two levels: a Glycymeris latiradiata community below, and a Turritella fauna washed together in pockets above, representing a transition between the Pitar polytropa and Turritella venus communities. Palaeobotanical investigations on the material of this locality were performed by PÁLFALVY, I. and RÁKOS, L. (PÁLFALVY 1965). Thirty taxa were identified based on the macroflora, on macrofloristical and pollen studies. As there is no description or illustration of the material, and the species names are not included in the collection, we began to work on the material as if it were a new, so far unidentified assemblage. The mentioned collection is deposited in the Palaeobotanical Collection of the Hungarian Geological Survey (MÁFI BK classification number). There is also some unidentified material, collected by RÁSKY, K. and RÁKOSI, L. deposited in the Palaeobotanical Collection of the Hungarian Natural History Museum. The above material has been completed by the collection of the author now also deposited in the Hungarian Natural History Museum, Budapest.