The granitic rocks along much of the south coast formed 1.5 billion years ago, placing them among some of the oldest rocks in the world. As the Australian continent collided with Antarctica, the rocks along the south coast became part of the Albany-Fraser Orogen, and 600 million years ago the area was a massive mountain range.
Granitic rocks along much of the south coast are around 1.5 billion years old, placing them among some of the oldest in the world. When the Australian continent collided with Antarctica, these rocks became part of the Albany-Fraser Orogen, and 600 million years ago, this region was a vast mountain range.