Cretaceous biostratigraphy of the Eromanga enabled correlation within the Great Australian Basin and with other basins in Australia. Comparison of the Australian sea level curve with other structurally simple intracratonic basins worldwide showed that these events were eustatic. The mechanism during eustatic changes in sea level is not yet fully understood, but may be related to changing rates of sea floor spreading.
Morgan R. 1980. Eustasy in the Australian Early and Middle Cretaceous. Geological Survey of New South Wales - Bulletin 27