Английская Википедия:Estavelle
Материал из Онлайн справочника
Шаблон:Short description In karst geology, estavelle or inversac is a ground orifice which, depending on weather conditions and season, can serve either as a sink or as a source of fresh water. It is a type of ponor or sinkhole.[1][2]
References
Шаблон:Caves Шаблон:Rivers, streams and springs