Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 17. 1994. (Budapest, 1994)

Fig. 1. Location of the paleobotanical site 4. A light grey clay (it is clayey aleurite according to the grain-size analysis by Gy. SZAKMÁNY) of conchoidal fracture, with thin bands of sand along the bedding planes. Some scarce Tympanotonus margaritaceus and Melanopsis impressa hantkeni indicate a brackish facies similar to that of the underlying layer. There are many tubular sand-filled burrows and excellenty preserved leaf imprints. 5-10. An alternation of clay and sand, with the predominance of sand upwards. The clay contains leaf imprints and trace fossils; no other fossils have been observed. 11. A hard, fine-grained sandstone with casts of Glycymeris sp. and Turritella venus, indicative of a marine ingression. 12. A friable, fine grained sandstone. 13. A clayey fine sand with a Tympanotonus-Polymesoda community similar to that of Layer 3, with Polymesoda convexa brongniarti, Ostrea cyathula, Turritella beyrichi, Tympanotonus margaritaceus, as the most abundant fossils. The grain-size analysis of the layer with fossil leaves was made by Gy. SZAKMÁNY (Eötvös Loránd University, Budapest). On the basis of the data the sediment is clayey coarse silt (Table 1), which is visible on the frequency and cumulative curves (Fig. 3). The percentile measures show that the sediment of this layer is very well sorted. The fine-skewed curve suggests that this territory had a low-energy sedimentary environment. The graphic kurtosis is platykurtic; it is caused by the moderate enrichment of the very small grain-sized (3.5-2.0 ) clay.