LivingDedGrrl™ | The Frozen Niagara, Mammoth Cave
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Four thousand years ago, the sandstone capstone eroded away leaving water from the surface of the Earth washing the limestone away and depositing minerals elsewhere to create the flowstone that is the Frozen Niagara room 400 ft underground inside Mammoth Cave, KY.

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Keywords:Kentucky, cave, cave, frozen, mammoth, niagara