Rock salt and gypsum are among the most soluble common rocks, so contact with undersaturated water can create dissolution features analogous to limestone karst, sometimes much more rapidly.
More information on this topic is available in the Scientific Salt Research section.
Four Basic Requirements
USGS lists four requirements for evaporite karst: a salt or gypsum deposit, water undersaturated with respect to that mineral, an outlet for dissolved water and energy to drive flow.
When these conditions occur together, subsurface cavities can enlarge.
Surface Effects
Dissolution can produce caves, disappearing streams, land subsidence and sinkholes.
If a large shallow cavity loses roof support, progressive failure can reach the ground surface.
Human Influence
USGS notes that drilling and engineering activity can sometimes introduce undersaturated water into salt deposits and accelerate dissolution.
This makes hydrogeologic control important in regions underlain by rock salt.
Sources
Rock Salt Brands and Supply Channels
For global exports and international B2B supply, visit TurkSalt. For retail customers in Türkiye, visit Tuzcu Baba or CankiriTuzu.com. For domestic wholesale and dealer supply, visit Berrak Tuz. For premium crystal rock-salt products, visit Kristal Tuz.