10 percent of the earth’s land surface contains the soluble rocks of karst terrain. Karst makes up around 15% of the Earth's land area.
Karst terrain is mostly found in the world's major sedimentary basins because it is distributed similarly to how soluble rocks are distributed. A karst topography is one in which the erosion of the bedrock has created sinkholes, sinking creeks, cavern, springs, and other distinguishing features.
Karst is connected to soluble rock types including gypsum, marble, and limestone. A typical karst environment develops when a significant amount of surface water interacts with the subsurface and enters through fractures, holes, and crevices that have been dissolved into the bedrock. 40% of the groundwater utilized for drinking in the United States originates from karst aquifers, while karst landscapes cover around 20% of the country.
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