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Blowhole (geology)
In geology, a blowhole is formed as sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface, which can result in blasts of water from the top of the blowhole if the geometry of the cave and blowhole and state of the weather are appropriate.〔
== Mechanics ==
Blowholes are likely to occur in areas where there are crevices, such as lava tubes, in rock along the coast. These areas are often located along fault lines and on islands.〔 As powerful waves hit the coast, water rushes into these crevices and bursts out in a high pressured release.〔 It is often accompanied by a loud noise and wide spray, and for this reason, blowholes are often sites of tourism.〔
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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