Cave rainwater and groundwater charged with HCO (carbonic acid) and naturally occurring organic acids. The dissolution process produces a distinctive landform known as "karst", characterized by sinkholes and underground drainage. Limestone caves are often adorned with calcium carbonate formations produced through slow precipitation. These include flowstones, stalactites, stalagmites, helictites, soda straws and columns. These secondary mineral deposits in caves are called "speleothems". The portions of a solutional cave that are below the water table or the local level of the groundwater will be flooded. Lechuguilla Cave in New Mexico and nearby Carlsbad Cavern are now believed to be examples of another
Cave of the Winds (Colorado) Cave Coral, or Cave Flowers; also commonly considered to be Beaded Helectites which appear to defy the laws of gravity by growing in strange directions and not being forced down by gravity like many cave formations. Silent Splendor is sealed from public view by an Environmental Gate, a large tube made of PVC that seals in moisture to allow the area of the cave to continue forming. Other lesser known attractions include a "bottomless pit," often the scene of practical jokes by the guides, and a one of a kind region referred to as "the rat." In the late 1980s