25 Strangest Geological Formations On Earth

19
Gibson Steps (The Twelve Apostles) – Great Ocean Road, Australia
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The Twelve Apostles is a collection of limestone stacks off the shore of Port Campbell National Park, near Great Ocean Road in Victoria, Australia. They were formed by the harsh weather conditions from the Southern Ocean gradually eroding the soft limestone to form caves in the cliffs, which then became arches, which in turn collapsed, leaving rock stacks up to 45 meters high.
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