Why Australia's Bungle Bungle Range wears a coat of living, breathing stripes
In short: Rising from the semi-arid savannah of Western Australia, the beehive-shaped sandstone towers of Purnululu National Park are a geological marvel. Their iconic orange and grey bands are not merely mineral deposits; they are the result of ancient, living cyanobacteria that stabilize these fragile, 20-million-year-old formations against the harsh desert elements.
Purnululu National Park, a World Heritage Site in the East Kimberley region, is defined by the Bungle Bungle Range. This landscape of cone karst towers reaches heights of up to 578 metres above sea level. While the exact mechanics of their formation remain a subject of scientific inquiry, these structures are known to be remnants of a Devonian sandstone plateau, carved over 20 million years by wind, rain, and sheet wash. The resulting terrain is a labyrinth of sheer-sided gorges and slot canyons that plunge 100 to 200 metres deep.
The striking visual identity of the towers comes from their alternating bands. The orange layers consist of oxidised iron compounds, which dry out too rapidly for biological life to thrive. In contrast, the dark grey bands are thriving colonies of cyanobacteria—single-cell photosynthetic organisms. These organisms grow on layers where moisture accumulates, creating a protective crust that prevents the sandstone from eroding. This biological stabilization is essential, as the surface of these towers is remarkably fragile.
Beyond its geological significance, the park is deeply connected to its traditional owners. In 2022, the Federal Court of Australia formally recognized the Purnululu and Gajangana Jaru native title claimants. Today, the Bungle Bungles Aboriginal Corporation holds title in trust for the Jaru, Gija, and Malngin people. The park is managed through a partnership between these traditional owners and the Western Australian Department of Biodiversity, Conservation and Attractions, ensuring that both the physical landscape and the cultural stories—such as the Gija creation story—are preserved for the future.
Accessing this remote wilderness requires preparation. The 53-kilometre Spring Creek Track is restricted to four-wheel-drive vehicles and is only passable during the dry season, typically from 1 April to 31 December. The journey to the visitor centre takes about three hours, though aerial access via helicopter or light aircraft offers a less demanding alternative. Whether viewed from the air or navigated by track, the park stands as a testament to the intersection of deep geological time and living biological processes.
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Sources
- Summary by Intellect · source: Purnululu National Park
- Also: Wikidata — Purnululu National Park · CC0
- Also: Wikidata — Purnululu National Park · CC0
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