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…)
Coin flipping is a way of choosing between two alternatives. The person who calls correctly wins. It’s often used to make decisions at the beginning of games and sports. But if someone says “heads I win, and tails you lose”, then you always lose! That’s not fair. But it’s how people often treat the Bible. They are willing to accept many ideas, as long as they aren’t based on the Bible.
For example, Australian researchers have investigated Aboriginal stories describing times when sea levels were lower than today (Reid et al, 2014). The orally-transmitted Aboriginal stories were written down after Europeans arrived in Australia in 1788. The stories describe coastal flooding which the researchers identify with the rise in sea level since the last ice age to its present level about 7,000 years ago on the geologic time scale (Appendix A). See Appendix B for the equivalent biblical dates. The team analyzed the contours of the land where the stories were told and used reconstructions of prehistoric sea levels to date the origins of each of the stories. They claim that these stories can be 10,000 years old which represents accurate oral transmission across 400 generations. Nunn and Reid (2015) expanded their analysis to 21 stories about coastal drowning that in most cases was considered likely to recall the effects of postglacial sea-level rise more than 7,000 years ago. They also noted that “no Aboriginal stories are known that talk of the sea level falling and exposing coastal lands”. (more…)