Fig.1. A: Location map and B: geological and
hydrological setting of the Olkusz-Zawiercie karst region.
1. Upper Jurassic limestones on the surface; 2. Upper Jurassic limestones under
the cover of sand-clay deposits; 3. Triassic limestones and dolomite, also nonkarstic
rocks; 4. springs; 5. rivers; 6. limit of hydraulic depression cone in Middle
Triassic aquifer; 7. well at Chechlo (see Fig.2); 8. altitude in m a.s.l.