Mondo Knows Facts

Dripping mineral water builds stalactites and stalagmites in caves

Precipitated calcium carbonate forms hanging icicle structures and floor mounds

Stalactites and stalagmites form in karst cave systems when rainwater absorbs carbon dioxide from soil to form weak carbonic acid. As acidic groundwater trickles through limestone bedrock, it dissolves calcium carbonate before entering open cave caverns. When water droplets release carbon dioxide into cave air, dissolved calcite precipitates to form dripstone structures over centuries.

Travertine stalagmite formed by very rapid dripping (Crystal Onyx Cave, near Cave City, Kentucky, USA) 1 (23638823440)
James St. John ยท CC BY 2.0 ยท licence ยท source

Where this comes from

USGS

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Tags: earth science, caves, geology

Dripping mineral water builds stalactites and stalagmites in caves: the short answers

Where does this come from, and can I check it?
Precipitated calcium carbonate forms hanging icicle structures and floor mounds. The figure is taken from USGS, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
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