V Mankově skále Cave, karst cave, structural analysis, petrography, stratigraphy, electrical resistivity tomography

Článek popisuje geologii, geomorfologii, stratigrafii a hydrologii jeskyně ve slepencích palkovického souvrství v Palkovických hůrkách (Vnější Západní Karpaty) - dále viz anglický abstrakt.

Karst cave and landform occurrences within the Czech part of the Outer Western Carpathians and the Vienna Basin are rare. Here we report on akarst cave V Mankově skále in another area, at Myslíkovské Lurdy, locality in the southern part of the Palkovické hůrky Hills near Frýdek-Místek town. Although this cave has been known among the locals for many years, its lithology, stratigraphy, karst geomorphology and structural control have never been described in detail. This paper aims to fill in this gap. The V Mankově skále Cave is a 10m long karst cave with an entrance located at the outcrop of conglomerate layer consisting of massive intraclasts of the Štramberk limestones. The analysed samples of conglomerate contain clasts of detrital biogenic limestone, sandstone ararely also phyllite. Clay flow rolls found at the bottom of sandstone overburden of the conglomerate bed contain dinoflagellate assemblage indicating amaterial redeposition during the Upper Campanian/Lower Maastrichtian period. The newly studied landforms represent the karst within the youngest host rocks on the territory of the Outer Western Carpathians in Czechia, making part of the Late Cretaceous Palkovice Fm. within the Baška Development (Silesian Unit). Numerous wall scallops and karren forms have been identified on the cave walls, indicating genesis under phreatic conditions. However, the structural analysis and cave morphology indicate that the cave development is probably also related to mechanical effect of gravitational slope movements.