... color inside the cave. In 1974, more than 670,000 people visited Carlsbad Caverns. Caves seem to be a natural wonder to many visitors. Caves have natural openings in the ground that lead deep into the body of the cave. These openings are called sinkholes, which are funnel-shaped structures that are the entrances to the caves. Caves remain at a constant temperature of 60 degrees all year round. Caves range in size from single small rooms to mile long passages that interconnect with one another. Speleology is the scientific study of caves. Speleothems are the decorative dripstone features inside a cave. Speleothems (cave formations) need rainfall to pass through the plant debris and carbonate bedrock to form. The rate of formation of speleothems depends on the rate of water flow and how much water there is. Also, the rate of formation depends on the temperature and humidity conditions in the cave, ...

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