This image is included in 3 galleries 1) "Landscapes" curated by Scott Kennedy, 2) "Amazing Coasts" by KAIAZ75 and 3) "Sea" by cristian salvadori.
Port Campbell National Park is world famous for its extraordinary collection of wave-sculpted rock formations and the Twelve Apostles. The rock stack is called the "Razorback". The sharp edges and bumps along its back are caused by wind-blown spray, which hardens small areas of rock. The softer rock around these erodes away, leaving an uneven surface. Wave energy channelled along the side of the stack carves the deep smooth grooves just above sea level. With one wave every 14 seconds, there is a lot of erosion over a year, a century, or a thousand years.
The Razorback once extended much further out to sea. The force of the waves gradually eroded and undercut the base of the stack. Vertical cracks in the stack were widened by rainwater, forming a line of weakness. Huge blocks of rock then collapsed into the sea, leaving the rock shelf we can see today. Info according to Parks Victoria.
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