Friday, 27 October 2006

Blow Hole

Blow Hole

This is the blow hole. The feature of this place was of the cave it has and when there is a high tide and a strong wave, waters will come "spurting" out of the hole. This picture was taken with a slow shutter speed on a tripod. This helps to create the negative touch of the picture. Instead of being blown out of the hole, it seems that we are being sucked into the hole itself.

In geology, a blowhole is a cavity formed in the ground at the inland end of a sea cave. When waves enter the mouth of the cave they will be funneled up towards the blowhole, which can result in quite spectacular splashes if the geometry and state of the weather is appropriate.

Also the name of a rare geologic feature in which air is either blown out or sucked into a small hole at the surface due to pressure differences between a closed underground cavern system and the surface. The most famous are the blowholes near Flagstaff, AZ US. It is estimated that the closed underground passages have a volume of at least 7 billion square feet. Wind speeds can approach 30 miles per hour.


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