The Eromanga Sea: An Inland Sea That Covered One Third of Australia

Once stretching across one-third of the Australian continent, the Eromanga Sea was a vast inland ocean that flooded the landscape during the Early Cretaceous. Beneath today’s dry outback lies the legacy of this prehistoric sea — recorded in fossils, opal-rich sediments, and the mighty Great Artesian Basin. In this post, we explore how the Eromanga Sea formed, what lived within its waters, and how it continues to shape Australia’s geology and groundwater systems today.