Mount Warning

Mount Warning (Aboriginal: Wollumbin), a mountain in the Tweed Range in the Northern Rivers region of New South Wales, Australia, was formed from a volcanic plug of the now-gone Tweed Volcano. The mountain is located 14 kilometres (9 mi) west-south-west of Murwillumbah, near the border between New South Wales and Queensland. Due to Mount Warning's proximity to Cape Byron, the Australian continent's easternmost point, it is the first place on mainland Australia to receive the sun's rays each day.

Lieutenant James Cook saw the mountain from the sea and named it Mount Warning. At he named a bit of land jutting out of the shoreline as point danger Fingal Head. Together they were named as a point of reference to warn other explorers that came afterward.

Shield volcano

Mount Warning is the central volcanic remnant of an ancient shield volcano, the Tweed Volcano, which would have been about 1,900 m (6,200 ft) above sea level or just under twice the height of the current mountain. This volcano erupted around 23 million years ago. As the mountain's central vent cooled it shrank, forming a depression at the top that has greatly eroded.