karst lake
lake formed as a result of the collapse of subterranean caves, especially in water-soluble rocks such as limestone, gypsum and dolomite
en-GB/ˈkɑːst ˈleɪk/
en-US/ˈkɑɹst ˈleɪk/
lake formed as a result of the collapse of subterranean caves, especially in water-soluble rocks such as limestone, gypsum and dolomite