The earliest known geological records in Australia are 4.4 billion years old taken from sedimentary rock samples. Geological rock samples range in age through various of Earth's eras: Precambrian (4.4 billion years ago - 550 million years ago), Paleozoic (252 million years ago), Mesozoic (66 million years ago), through the current Cenozoic era.
After separating from the supercontinents Pangaea and Gondwana, the continent of Australia formed and is currently very slowly merging with the Asian continent. Various geological processes have helped form different types of geological structures in Australia, from billion year old rock and stone formations, to relatively young mountains, valleys, deserts, islands, bays, rivers and lakes. In addition to this Australia is known for its unique and diverse ecological systems that include reefs, forests and bushland.
Find information on a range of Australian significant geographical places below.