The mainland of Australia, once in a while known in specialized settings by the names Sahul (/səˈhuːl/), Australinea, or Meganesia to recognize it from the nation of Australia, comprises of the landmasses which sit on Australia’s mainland plate. The name “Sahul” takes its name from the Sahul Shelf, which is essential for the mainland rack of the Australian landmass. The landmass incorporates territory Australia, Tasmania, and the island of New Guinea, which comprises of Papua New Guinea and Western New Guinea (a region of Indonesia). Arranged in the topographical district of Oceania, Australia is the littlest of the seven customary landmasses.
The mainland incorporates a mainland rack overlain by shallow oceans which partition it into a few landmasses—the Arafura Sea and Torres Strait between territory Australia and New Guinea, and Bass Strait between terrain Australia and Tasmania. At the point when ocean levels were lower during the Pleistocene ice age, including the Last Glacial Maximum around 18,000 BC, they were associated by dry land. During the previous 18,000 to 10,000 years, rising ocean levels flooded the swamps and isolated the landmass into the present low-lying parched to semi-bone-dry terrain and the two rugged islands of New Guinea and Tasmania.