English Karst Cited by user Billyshiverstick on 17 Nov 2023 Karst is a topography formed from the dissolution of soluble carbonate rocks such as limestone, dolomite, and gypsum.
English Aquifer Cited by user RockDoc485 on 14 Dec 2018 An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt).