The irony writes itself. Eromanga is the place furthest from any modern ocean, yet the oil beneath it was laid down by a sea. More than a hundred million years ago, during the Early Cretaceous, a shallow inland ocean known as the Eromanga Sea covered much of what is now central and eastern Australia. Marine creatures lived and died in it, settling into the mud of its floor. As the sea retreated and the ages passed, those sediments hardened into the Cooper and Eromanga Basins, and the buried organic remains were cooked over geological time into hydrocarbons. Today Eromanga sits at the heart of the largest oil-producing region in mainland Australia. The crude that the refinery processes is, in a real sense, the chemical memory of an ocean that drained away long before there were humans to name the dry plain it left behind.

The refinery has been owned and run since 1986 by IOR, a name derived from the original company, Inland Oil Refiners. It is small by any measure, designed to process around 1,250 barrels of crude a day, a rounding error beside the coastal megarefineries. But its scale is the point. Eromanga produces high-quality diesel and specialty petroleum products tailored to the demands of remote industry, including a mining-grade fuel engineered for exceptionally low exhaust particulates. The company runs a full supply chain from the wellhead outward, distributing through more than 70 unstaffed diesel stops that use remote sensing to keep fuel flowing across country where the nearest attendant might be hundreds of kilometres away.

There is a strategic argument for keeping crude in the outback rather than shipping it to the coast and back. Australia refines very little of its own fuel; most arrives by tanker from overseas, leaving the country exposed whenever those long sea lanes are disrupted. In that context, a refinery that turns local oil into local diesel without ever touching a port has obvious appeal, and Eromanga's modest plant has repeatedly been floated as a small but genuine contributor to national fuel security, with talk of expanding its output. It will never rival the giants on the seaboard. What it offers instead is resilience: fuel produced and consumed in the same remote heartland, independent of the long umbilical cords that tie most of the country's energy to its distant edges.

Eromanga's other claim to fame shares the same deep-time geology that gave it oil. In 2005, in the Cretaceous rock of the surrounding country, fossils were unearthed of a colossal long-necked sauropod later named Australotitan cooperensis and nicknamed "Cooper." Estimated at 25 to 30 metres long and among the largest dinosaurs ever found anywhere, it is Australia's biggest known dinosaur. The bones were excavated and prepared with the Queensland Museum and are now the centrepiece of the Eromanga Natural History Museum. So this remote refining town holds a strange double inheritance from the same ancient world: titans that walked its plains, and the buried sea whose oil now fuels the present.