- A blowhole is formed as sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface.
- It can result in blasts of water from the top of the blowhole the cave and blowhole and state of the weather are appropriate.
- A blowhole is called air is blown through a small hole at the surface due to pressure differences between a closed underground system & the surface.
- The blowholes of Wupatki National Monument are an example of such a phenomenon.
- It is estimated that the closed underground passages have a volume of at least 7 billion cubic feet.
- Wind speeds can approach 30 miles per hour.
|Alofaaga Blowholes on Savai'i Island in Samoa|
|Hummanaya - in Southern Province, Sri Lanka.|
|Nakalele Point in north western Maui, Hawaii.|