Lačný A., Sýkora M. & Plašienka D., 2015: Reinterpretation of occurrences of the Meliaticum near villages Brádno and Rákoš (Revúcka vrchovina Highland, Western Carpathians). Acta Geologica Slovaca, 7, 1, 85–92. (in Slovak with English summary)

Reinterpretácia výskytov meliatika v oblasti Brádna a Rákoša (Revúcka vrchovina, Západné Karpaty)

Reinterpretation of occurrences of the Meliaticum near villages Brádno and Rákoš (Revúcka vrchovina Highland, Western Carpathians)

Alexander Lačný, Milan Sýkora & Dušan Plašienka

Katedra geológie a paleontológie, Prírodovedecká fakulta, Univerzita Komenského v Bratislave, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava; lacny@fns.uniba.sk

Abstract

We present results of reinvestigation of two areas where, according to published geological maps, the Meliatic rocks should occur as tectonic slices inserted between the Turnaic Slovenská skala Nappe and the underlying Palaeozoic complexes of the Gemericum. However, these occurrences were not confirmed by our research. Instead, we document a continuous, though overturned, Lower–Middle Triassic succession of the Turnaicum in the area of Rákoš Village, since no typical Meliatic rocks were found there. Similarly, the supposed slivers of the Meliatic Bôrka Nappe near Brádno Village are reinterpreted as cataclastic tectonic breccias (rauhwackes). The breccias are dominantly composed of carbonate fragments with small portion of siliciclastic material derived from the overriding Turnaic thrust sheet. They likely formed during its nappe emplacement over the underlying Gemericum.

Key words: Turnaicum, Slovenská skala Nappe, Meliaticum, Bôrka Nappe, Revúcka vrchovina Highland, cataclasis, fold structures

Manuscript received: 2014-10-22

Revised version accepted: 2015-05-04