Down folded layers of chalk or limestone sandwiched between impermeable rock layers and containing trapped water is referred to as

Answer Details

Down folded layers of chalk or limestone sandwiched between impermeable rock layers and containing trapped water are referred to as artesian formations. An artesian formation is a type of aquifer, which is a layer of rock or sediment that holds water and allows it to flow through it. The water in an artesian formation is under pressure due to the weight of the overlying impermeable rock layer, which forces the water to the surface when a well is drilled. This type of formation is common in areas with folded or tilted rock layers, such as the Great Artesian Basin in Australia, which is the largest artesian basin in the world.