Indigenous Australian storytelling has been found to accurately record dramatic sea level rises that occurred more than 7,000 years ago, in a continuous oral tradition without parallel anywhere in the world, according to new research.
Marine geographer Patrick Nunn from Sunshine Coast University and linguist Nicholas Reid from the University of New England identified 21 stories from across Australia that faithfully describe events between 18,000 and 7,000 years ago, when sea levels rose by 120 metres. The accounts, passed down orally for over 300 generations, contradict previous scholarly assumptions that preliterate oral traditions could not remain accurate for more than 800 years.
Reid explained that a key feature of Indigenous storytelling culture—a 'cross-generational cross-checking' process—ensures remarkable consistency. Elders teach stories to younger generations while nephews and nieces are tasked with verifying the accuracy of the narratives. 'When you have three generations constantly in the know, and tasked with checking as a cultural responsibility, that creates a mechanism that could explain why Indigenous Australians seem to have done something that hasn’t been achieved elsewhere,' Reid said.
The stories range from factual accounts, such as those around Port Phillip Bay near Melbourne describing the loss of kangaroo hunting grounds, to allegorical tales like that from Spencer Gulf, where an ancestral being punishes a clan by gouging a groove for the sea to swallow the land. The research suggests that the rising sea levels forced constant inland movement and renegotiation of territorial boundaries, with profound social and cultural consequences.
Some groups, such as those on Rottnest and Kangaroo Islands, fled up to 7,000 years ago, while others on Flinders Island perished as resources dwindled. The study, published in Australian Geographer, provides empirical corroboration of postglacial sea level rise documented by marine geographers.
