Solutional cave and most abundant solutional caves are located in limestone. Limestone caves are often adorned with calcium carbonate formations produced through slow precipitation. These include flowstones, stalactites, stalagmites, helictites, soda straws, calcite rafts and columns. These secondary mineral deposits in caves are called "speleothems". Limestone dissolves under the action of 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. Solutional caves in this landform—topography are often called karst caves. Lechuguilla Cave in New Mexico and nearby Carlsbad Cavern are now believed
Hang Down Your Head released in 2003. It was later appended as a bonus track to her 2003 album "World Without Tears". Gothic rock ensemble Human Drama recorded the song for their covers album "Pinups", which was intended as a tribute to the various artists that had influenced them. Country artist Jack Ingram has played the song at live concerts, and his version was recorded for his live debut "Live at Adair's" in 1995. Adapted from the "Hang Down Your Head" liner notes. Hang Down Your Head Hang Down Your Head is a song by Tom Waits appearing on his 1985 album "Rain Dogs".