All of this water that enters the cave has to go somewhere. It is no surprise that many caves have springs flowing out of them. Caves are not cut off from the rest of the world. Many have a constant flow of water moving in and out of the cave all of the time. This water carries the clay, which becomes cave mud This is natural. Unfortunately, people have often used sinkholes for trash dmps. This means that some caves get lots of junk in them. This is bad for the people and animals that depend on the caves for their water.
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