Mainland Australia is the main landmass of the Australian continent, excluding Tasmania and other offshore islands. The landmass also constitutes the mainland of the territory governed by the Commonwealth of Australia, and the term, along with continental Australia, can be used in a geographic sense to exclude surrounding continental islands and external territories. Generally, the term is applied to the states of New South Wales, Queensland, South Australia, Victoria, and Western Australia, as well as the Australian Capital Territory, Jervis Bay Territory, and Northern Territory.
The term is typically used when referring to the relationship between Tasmania and the other Australian states, in that people not from Tasmania are referred to as mainlanders. Tasmania has been omitted on a number of occasions from maps of Australia, reinforcing the divide between Tasmania and the mainland. The 1982 Commonwealth Games in Brisbane left Tasmania off the map of Australia during the opening ceremony, as did the designs of the Australian Swim Team uniform for the 2014 Commonwealth Games in Glasgow.
The land mass covers 7,595,342 km2 (2,932,578 sq mi), about 98.7% of the area of the country of Australia and covering 1.5% of Earth's surface. Its population is about 24.5 million, 98% of Australia's total population.
Formation of Mainland Australia
130 million years ago, Australia (and Antarctica) separated from a supercontinent known as Gondwana. It took roughly another 80 million years (53 million years ago) for Australia to fully separate from Antarctica and set course for where we see the two continents today.
During the last ice-age around 35,000 years ago, sea levels (around Australia) dropped by 120m, developing a continuous stretch of land between now day Papua New Guinea, Australia and Tasmania. Over the next 6,000  years the ice gradually melted, increasing sea-levels, cutting of Papua New Guinea and Tasmania from the Australian mainland.
- Fauna of Australia
- Flora of Australia
- Geography of Australia
- List of islands of Australia
- States and territories of Australia
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