Geology of Australia

The Amazing Rocks of Australia

Australia is a big land with many different kinds of rocks. These rocks tell stories that go back more than 3.8 billion years! Some of the rocks are among the oldest on Earth. They help us learn how our planet has changed over millions of years.

Australia sits on a giant piece called the Indo-Australian plate. This makes Australia very special. The land has thick layers of rock, more than 200 kilometres thick in some places! Wind and water shape these rocks, making beautiful sand dunes and lakes.

Australia's rocks come in many types. There are very old rocks called Archaean and Proterozoic rocks, and younger rocks from later times. Some of these rocks formed when Australia was part of a huge land called Gondwana, which also included Antarctica and Africa.

Australia has three big areas of very old rocks called cratons: the Yilgarn craton, the Pilbara Craton, and the Gawler craton. These cratons came together a very long time ago to help form Australia. The land has changed a lot, but these old rocks still tell us amazing stories about Earth’s past.