- Any variety of microcrystalline, coralloid or botryoidal calcite deposit that is distinguished by curved outer surfaces and curved internal structures. Large examples, including clouds, are formed under water. Smaller varieties, also known as cave coral and cave popcorn, are splash deposits, or are precipitated onto cave passage walls from mists or thin surface films of saturated water .
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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botryoid — , botryoidal speleothem 1. Generally sub spherical or globular calcium carbonate deposits ranging in size between tiny beads and masses up to 1 m across. Botryoidal describes a form resembling a bunch of grapes . 2. A grape like… … Lexicon of Cave and Karst Terminology