- A rough, knobby growth of calcite resembling coral in shape, generally small; found on floor, walls, or ceiling of a cave .Synonym: botryoid; coral formation; cave popcorn.See also knobstone.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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Cave popcorn — Cave popcorn, or cave coral, is a very common cave formation. It actually comes in many sizes, shapes, and colors, but is most often found in small, knobby clusters resembling popcorn. Cave popcorn is composed of calcium carbonate and forms by… … Wikipedia
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cave popcorn — See cave coral … Lexicon of Cave and Karst Terminology
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