Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 62. (Budapest 1970)

Szabó, I. ; Ravasz, Cs.: Investigation of the Middle Triassic volcanics of the Transdanubian Central Mountains, Hungary

Fig. 3. Upper Anisian and Lower Ladinian interbedding tuff layers in the Pécsely-Aszófő area (I). — 1. Cherty limestone. — 2. Chert, radiolorite. — 3. Quartzose shale. — 4. Siliceous limestone. — 5. Tuff. — 6. Tuffaceous clay. — 7. Yellow limestone. — 8. Dolomite. — 9. Sampling place. limestones divide the sequence into two parts; the tuffaceous marls of the upper part—up to the red, cherty Tridentinus limestone Horizon

— are characterized by the high frequency of Posidonia. In the higher Ladinian beds, irrespective of a few thin, green clay layers, no significant tuffaceous formation is known to occur. In the profiles in the vicinity of Felsőörs (II), only Lower Ladinian tuffaceous rocks are known to occur (Fig. 4). Compared to the former territory, the sequence is thinner here, comprising a smaller number of siliceous layers. In these the volcanic fragments are easily recognizable even to the naked eye. This formation is identical with the Trachyceras reitzi beds described by J. BÖCKH (1872). Often fossiliferous, the formation is overlain, again, by red, cherty Tridentinus limestones. In the vicinity of Sóly (III) the ratio of the tuffaceous rocks is more subordinate and, like in the previous case, two horizons are separated by the tuff material. The tuffaceous layers are exposed on the west side of the őrhegy at Sóly and in the roadcuts of the Veszprém-Várpalota road, near kilometre stone 33 (Fig. 5). Within the 3.5-m-thick argillaceous-calcareous sequence separating the Megyehegy Dolomite and the Upper Anisian thick-laminated, bedded, cherty-siliceous dolomites, the tuff intercalation is 20 to 50 cm thick, of yellowish-green colour, rather