Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 20. 2002. (Budapest, 2002)

VÖRÖS, A. & PÁLFY, J. Locality and outcrops The Horog-hegy (265 m) lies 2 km ENE of the village of Köveskál, 4 km N of the northern shore of Lake Balaton. The bulk of the hill is formed by Megyehegy Dolomite (Lower Pelsonian?), overlain by gently dipping beds of Felsöörs Limestone (Pelsonian to Illyrian), about 40 m in thickness. The fossiliferous localities occur on the forested northern slope of Horog-hegy, between the hilltop and an E-W running forest track (Figure 1). During a short visit in 1995, T. BUD AI, L. DOSZTÁLY, I. SZABÓ and A. VÖRÖS collected ammonites from loose blocks in the area, which indicated the presence of both the middle Anisian Balatonicus Zone and the uppermost Anisian "Larciaroceras beds". T In 2001, J. PÁLFY, I. SZENTE and A. VÖRÖS made a more detailed field survey on the northern slope of the Horog-hegy and excavated a few small artificial exposures; this involved the removal of the thin (10-20 cm) soil above the bedrock and bed-by-bed collecting of fossils (brachiopods, ammonoids, bivalves) at four points (Horoghegy I., n.,m. and LV.; Fig. 1). Horog-hegy I. This is the largest outcrop with a 4 m horizontal and 1 m vertical extent, cut into the rather steep slope. The lowermost unit is a more than 50 cm thick, light grey, slightly siliceous, unfossiliferous limestone (mudstone). This is overlain, with a sharp contact, by a 40 cm thick, light-brown, coarse-grained bioclastic limestone with brachiopods of rock-forming amount ("Upper Recoaro"); this rock-type is very widespread on the hillside and provided the brachiopod fauna of the previous collections). On the irregular top of the brachiopod limestone, a thin (5-10 cm) layer of ochre-yellow, finegrained crinoidal limestone follows which yielded a moderately rich, poorly preserved ammonoid fauna (Beyrichites, Scbreyerites },Judicarites). Horog-hegy II. A smaller, 2 m wide outcrop around 50 m eastwards from the previous one, along the strike of the beds. The exposed sequence is almost the same as in Horoghegy I., but here the lowermost mudstone is well-bedded, slightly bittiminous and yielded a poorly preserved Bulogites, and the brachiopod limestone ("Upper Recoaro") attains only 20 cm thickness. Horog-hegy III. Nearer to the hilltop, 40 m southwards from Horog-hegy I, a small pit exposes a few thin beds of monotonous, dark grey, bituminous limestones which provided some ammonoids (Balatonites, Norites). The measured dip is 20° to the NNW (320°). Horog-hegy IV. Another small pit 10 m southwards from the previous one. A tliin (10-15 cm) layer of brachiopod-rich, light grey bioclastic limestone ("Lower Recoaro"), intercalated between dark grey, bituminous limestones is exposed here. About 20 cm below, a yellowish-grey, mottled, pebbly mudstone layer appears. The measured dip is 18° to the NNW (330°). Apart from brachiopods and bivalves, this brachiopod bed also yielded, a few ammonoids {Balatonites, Norites). Figure 1 — Location of the study area. A — Index map of Hungary; B — Köveskál and its vicinity in the west-central part of Balaton Highland; C — Location of outcrops, I: Horog-hegy L, II: Horoghegy II., III: Horog-hegy III., IV: Horog-hegy IV., * : loose blocks with ammonoids of Trinodosus Zone.