Estavelle (Karst 🌍)
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. == References...
https://en.wikipedia.org/wiki/Estavelle
#Estavelle #Karst #CaveGeology #DinaricAlps #DinaricKarstFormations
