Most Aboriginal Australian stories about the changes in landscape and way of life caused by post-glacial sea-level rise are divided into two groups.

• One story is that the bad behaviour of a man named Goonyah caused the sea to flood the land, and he organised the people to stop it.
• In another, he led the people up a mountain to escape the water and rolled heated rocks into the sea.

The ancient stories of fighting a losing battle against the sea are concentrated along the coast of Brittany, the Channel Islands, Cornwall and Wales.

• In Britanny, the city of Ys was said to be protected by a series of sea defences that required gates to open at low tide. Then the King Gradlon's daughter, Dahut, opened the gates at high tide, letting the ocean destroy the city.
• A similar story is told about the fate of another city in Cardigan Bay.

The lesson we can learn is that sea-level rise cannot be stopped easily.

• While some conventionally trained geologists are curious about mythic stories, others don't like it, missing out on the kernels of truth embedded in the narratives.
• Literate people are also sceptical about the power of oral traditions.
• If academics don't follow good practice like asking permission first, publishing research can lead to accusations of cultural appropriation.

• The first-ever session that helped to validate geomythology in the minds of scientists was held in 2004 at the International Geological Congress. 
• Historian Adrienne Mayor wrote The First Fossil Hunters (2000). The book was the first systematic study of the evidence for the ancient discovery of fossils.

Ultimately, geomythology challenges our thinking about the past and the future. The geomyths provide information and details that would otherwise be easily missed.