From March 2021 the beach below Demons Bluff (near Anglesea in Victoria, Australia) has been closed due to the significant risk of cliff collapse. Landslips are unpredictable and can occur without warning. The size of material that falls onto the beach can be very large, with rocks and debris a potentially fatal hazard. A crack about 10 centimeters wide has grown to 70 centimeters in recent years, and that part of the cliff “is about to disappear”. The crack runs about 60 meters along the cliff. A large chunk of cliff collapsed at Demons Bluff in 2019. (more…)
In January 1990 a span of London Bridge collapsed, so its name was changed to London Arch. The arch is a tourist attraction along the Great Ocean Road near Port Campbell in Victoria, Australia. Before the collapse, visitors were able to walk from the mainland across the double-span natural bridge. Oceanic erosion of the limestone coastal cliffs caused the formation of the bridge and also caused its collapse to form an arch. Eventually arches collapse to form stacks like The Twelve Apostles, which are icons of the Australian landscape in the vicinity of London Arch (Appendix A).
In this post we will see that rock coastlines are eroding faster than we think. (more…)