Karst phenomena

The karst processes in Český kras were greatly influenced by the wide variety in mineral composition, the lack of water facilitated by the large number of faults where the karst water and its corrosive effects were concentrated. Besides small limestone pavements and sinkholes, caves also developed here. Only several larger caves have been discovered in the area but more than 250smaller cavities have been found. The most important and most well known is the Koněpruské jeskyně cave network with more than 2 km of underground passages. Several more caves have been discovered around Koněprusy and are protected in the Kotýz National Nature Monument. These include the Ve vratech, Jelínkův most, Děravá jeskyně and Kozí díry caves.

The other intensively-karstified area is around Srbsko, with many smaller cavities and the Na Chlumu cave system. Large caves also include the Barrandova jeskyně above the Berounka river valley and the Martina cave in Koda National Nature Reserve. The deepest cave discovered in Bohemia is the Arnoldka, at 111 metres below the surface, which is located in the Čeřinka quarry near Bubovice.

At present, surface water only descends into the underground karst circulation in a few places and on a small scale in the Bubovický potok stream valley, in the Propadlé vody valley, in the Tetínská rokle ravine and in the Císařská rokle ravine. The largest karst resurgences are the springs in Svatý Jan pod Skálou and also the Koda and Měňany resurgences.

PLA Administration Český kras

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