Estavelle
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Creux_Genat%2C_2.4.2005_und_17.4.2006.jpg/220px-Creux_Genat%2C_2.4.2005_und_17.4.2006.jpg)
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
[edit]- ^ "Karstgeology: Estavelle". www.showcaves.com. Retrieved 24 April 2020.
- ^ Milanovic, Petar (2004). Water Resources Engineering in Karst. CRC Press. pp. 211–212. ISBN 978-0-203-49944-3. Retrieved 24 April 2020.