GATHER ROUND GEOLOGY NERDS… Planet Earth’s Eocene epoch lasted from 56.5 to 35.4 million years ago. At the beginning of the Eocene, Gondwana, the ancient supercontinent from which our country was formed, had been splitting apart for some time, however Australia and Antarctica remained joined. Fast-forward to around 40 million years ago (plus a few extra details that we won’t delve into here…), Antarctica eventually split away from Australia and drifted south, creating a large, ridged valley, exposing the volcanic seams that then deposited lava flows around the more elevated parts of what we…