Every year, the mine "Janowiczki" extracts 200,000 tons of basalt aggregate to be used mainly for concrete and bituminous masses production. The basalt rock present in the region of Wzgórza Strzelińskie is a result of basaltic lava outpourings from the deep crevices that appeared here millions of years ago as a consequence of orogenic movements (upwarping of the Sudetes).