They get wider because limestone can be dissolved by rainwater. Rainwater runs over the surface of limestone and down into the vertical cracks, which are called joints. Underground, the water runs ...
Underground rivers dissolve the limestone and carry it away to leave these passageways which can be full of water during periods of heavy rainfall. This is a calcium carbonate deposit like an ...
These geochemicals are picked up as groundwater slowly dissolves the limestone, dolomite, and gypsum bedrock — also known as marine evaporite layers. In particular, erosion of gypsum deposits ...