How an ancient volcanic eruption sparked one of the world's oldest engineering feats
In short: In southwestern Australia, a dormant volcano named Budj Bim reshaped the earth 37,000 years ago. This geological upheaval allowed the Gunditjmara people to master their environment, creating a sophisticated aquaculture system of weirs and channels that predates the Egyptian pyramids and challenges traditional views of Indigenous history.
Budj Bim, also known as Mount Eccles, is a scoria hill rising 178 metres within the Newer Volcanics Province. This region, spanning 15,000 square kilometres, contains Australia's youngest volcanic activity. While early estimates of the mountain's eruption varied widely, research published in February 2020 using argon-argon radiometric dating placed the event at approximately 36,900 years ago. This timing aligns with Gunditjmara oral histories, which describe the eruption as a foundational event that revealed the ancestral creator-being Budj Bim.
The eruption produced the Tyrendarra lava flow, which traveled 50 kilometres to the ocean, fundamentally altering the local drainage. This geological shift created extensive wetlands that the Gunditjmara people harnessed for large-scale aquaculture. By manipulating the landscape with dams, weirs, and channels, they farmed short-finned eels for thousands of years. Carbon dating of one eel trap system at Lake Condah has confirmed an age of 6,600 years, illustrating a complex agricultural practice that contradicts the historical narrative of Indigenous Australians as solely hunter-gatherers.
The site's immense cultural and historical value led to its recognition as a UNESCO World Heritage Site in July 2019. The Budj Bim Cultural Landscape encompasses various protected areas, including the Tyrendarra Indigenous Protected Area and the Lake Condah Mission. These sites preserve not only the physical remnants of ancient engineering but also the enduring connection between the Gunditjmara people and their ancestral lands, despite the trauma of the Stolen Generations and forced displacement into government reserves.
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Sources
- Summary by Intellect · source: Budj Bim
- Also: Wikidata — Budj Bim · CC0
- Also: Wikidata — Budj Bim National Park · CC0
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