PIASKOWCE CERGOWSKIE JAKO NAJWAŻNIEJSZY SUROWIEC SKALNY WOJEWÓDZTWA PODKARPACKIEGO

Abstract

THE CERGOWA SANDSTONE AS THE MOST IMPORTANT INDUSTRIAL RAW MATERIAL IN THE PODKARPACKIE VOIVODSHIP

Abstract. Industrial mineral deposits mined in the Podkarpackie Voivodship of southern Poland are modest in size and of low variety. The best physical-mechanical properties are shown by the Cergowa sandstones (Lower Oligocene) which occur in the southern part of the region and constitute a subdivision of the Carpathian Flysch suite. The Cergowa sandstone, mined in the Lipowica II-1 quarry near Dukla, meets strict quality standards required of crushed stone used in aggregates by the construction industry. The outstanding physical properties result from the mineral composition and diagenetic processes. Dissolution of marginal parts of mineral grains increased the contact surface between corroded grains and the dolomitic-calcitic cement (with an admixture of clay matrix). This resulted in strong cementation of the Cergowa sandstones, which is expressed by very high hardness and resistance of the rock. The output of the Cergowa sandstone and other construction aggregate products mined in the Podkarpackie Voivodship does not meet the market demands, which reflect a continuous growth of the construction industry in the region.