Karst is an unmistakable sort of scene or geography that usually happens where carbonate strata (lime stones and dolo stones) are at the surface. Somewhat acidic water and water in the dirt gradually permeate through breaks, dissolving the stone and
making sinkholes, caverns, and numerous different elements that describe karst. In dry areas, karst components can create on dissolvable bedrock units, for example, gypsum or salt stores. karst geological investigation

http://www.golars.com/karst-geological-investigation.html

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