WARUNKI HYDROGEOLOGICZNE UTWORÓW TRIASU GÓRNEGO NA OBSZARZE GZWP LUBLINIEC–MYSZKÓW

Abstract

HYDROGEOLOGY OF THE UPPER TRIASSIC IN THE AREA OF MGWB LUBLINIEC–MYSZKÓW

Abstract. The Upper Triassic formations from the Silesian-Cracow Monocline are composed mainly of claystones and mudstones interbedded by limestones and sandstones. In the north of the monocline, these formations are up to about 260 m thick. From their lithologic characteristics, these would be treated in the hydrogeological practice as low water-bearing capacity rocks, and as a capping aquitard in the context of water-rich aquifers in the Muschelkalk and Roethian carbonate formations. Analysis of lithologies in exploratory wells drilled in the study area allowed separating 5 groundwater horizons in the Upper Triassic, which are connected with the sandstone formations occurring at the top portions of the Woźniki and Lisów formations, Woźniki limestones, Lisów breccia, reed sandstones and boundary dolomite. These aquifers may have hydraulic connections. This contribution presents a characterisation of the hydrogeologic conditions within the Upper Triassic in the north of the Silesian-Cracow Monocline, based on archival data from exploratory wells and own hydrogeologic investigations and observations performed in wells and piezometers.