Our last engagement for the day was to view the Blow Hole at Bicheno, a little fishing and holiday village on the east coast of Tasmania near the Bay of Fires and the Freycinet National Park.
Tasmania is mostly formed of dolerite rock that is only found in Australia. The blowhole, however, is formed of granite. Over thousands of years, the ocean has battered the granite to carve out a sea cave. The water, battering the inside of the cave, found a weak spot in the ceiling to form a blow hole through the granite. As the water rushes into the cave and hits the walls and swells with increasing pressure, it erupts out of the hole.
The geyser erupts with varying force and the water makes different shapes with every surge of the ocean. It can also blow with great force even when the ocean is relatively calm but not today!
I didn't manage to get a photo of 'A Blow' but you can see the rock formations covered in red lichen.
I have borrowed from the internet a photo of what the 'blow' looks like on a more active sea day.
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