Australia (continent) - Geography and Name

Geography and Name

With a total land area of 8,560,000 square kilometres (3,310,000 sq mi), the Australian continent is the smallest and lowest-lying human-inhabited continent on Earth. The continental shelf connecting the islands, half of which is less than 50 metres (160 ft) deep, covers some 2,500,000 square kilometres (970,000 sq mi), including the Sahul Shelf and Bass Strait. As the country of Australia is mostly on a single landmass, and comprises most of the continent, it is sometimes informally referred to as an "island" continent, surrounded by oceans.

Archaeological terminology for this region has changed repeatedly. Prior to the 1970s, the single Pleistocene landmass was called Australasia, derived from the Latin australis, meaning "southern", although this word is most often used for a wider region that includes lands like New Zealand that are not on the same continental shelf. In the early 1970s, the term Greater Australia was introduced for the Pleistocene continent. Then at a 1975 conference and consequent publication, the name Sahul was extended from its previous use for just the Sahul Shelf to cover the continent.

In 1984, W. Filewood suggested the name Meganesia, meaning "great island" or "great island-group", for both the Pleistocene continent and the present-day lands, and this name has been widely accepted by biologists. Others have used Meganesia with different meanings: travel writer Paul Theroux included New Zealand in his definition and others have used it for Australia, New Zealand and Hawaii. Another biologist, Richard Dawkins coined the name Australinea in 2004. Australia-New Guinea has also been used.