Yep, big surf does do this…
This is Duranbah, take a look at the cliff wall that has formed along the beach. The large swell that hit the Coast over the last week, coinciding with King tides etc, has simply chopped into the shore line like I chop into Tim Tams…
For more information on erosion and how we try to counteract it, then have a read of this article… Impact of coastal erosion in Australia