Noun
A pendent cone or cylinder of calcium carbonate resembling an icicle in form and mode of attachment. Stalactites are found depending from the roof or sides of caverns, and are produced by deposition from waters which have percolated through, and partially dissolved, the overlying limestone rocks.
In an extended sense, any mineral or rock of similar form and origin; as, a stalactite of lava.
Source: Webster's dictionaryLike limestone stalactites, they can leave lava drips on the floor that turn into lava stalagmites and may eventually fuse with the corresponding stalactite to form a column. Source: Internet
Splash stalactites As lava flows through a tube, material will be splashed up on the ceiling and ooze back down, hardening into a stalactite. Source: Internet
Eventually, these rings form a very narrow (0.5 mm), hollow tube commonly known as a " soda straw " stalactite. Source: Internet
It may begin as a small driblet of lava from a semi-solid ceiling, but then grows by accreting layers as successive flows of lava rise and fall in the lava tube, coating and recoating the stalactite with more material. Source: Internet
Records The White Chamber in the Jeita Grotto 's upper cavern in Lebanon contains an convert limestone stalactite which is accessible to visitors and is claimed to be the longest stalactite in the world. Source: Internet
There is a fountain in the middle of this hall, and the roof — a dome honeycombed with tiny cells, all different, and said to number 5000 — is an example of the "stalactite vaulting" of the Moors. Source: Internet