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stalactite
A stalactite (, ; from the Greek ''stalasso'', (σταλάσσω), "to drip", and meaning "that which drips") is a type of formation that hangs from the ceiling of caves, hot springs, or manmade structures such as bridges and mines. Any material which is soluble, can be deposited as a colloid, or is in suspension, or is capable of being melted, may form a stalactite. Stalactites may be composed of amberat, lava, minerals, mud, peat, pitch, sand, and sinter.〔 A stalactite is not necessarily a speleothem, though speleothems are the most common form of stalactite because of the abundance of limestone caves.〔
〕〔(【引用サイトリンク】publisher=Nova (TV series) )〕
The corresponding formation on the floor of the cave is known as a stalagmite.
==Formation and type==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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