UIS Commission on Karst Hydrogeology and Speleogenesis
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Glossary

Glossary of Karst and Cave Terms

ponor
(Slavic.) 1. Hole or opening in the bottom or side of a depression where a surface stream or lake flows either partially or completely underground into the karst ground-water system. A seaponor is where sea-water flows or is drawn into an opening by a vacuum in karstified rock [20]. 2. Hole in the bottom or side of a closed depression through which water passes to or from an underground channel [10]. Synonyms: (British.) swallet, swallow hole, stream sink; (French.) ponor, aven, gouffre, perte; (German.) Schlund, Saugloch, Schlinger, Ponor; (Greek.) katavothra; (Italian.) inghittitoio, capovento; (Russian.) ponor; (Spanish.) sumidero, ponor, perdida; (Turkish.) su yutan; (Yugoslavian.) ponor, utok, poziralnik, pivka. See also swallow hole.