Plates Boundaries. At the locations where two tectonic plates interact, a boundary between these plates exist. There are three types of boundaries that geologist observe. These boundaries are divergent boundaries, convergent boundaries, and transform boundaries.
Great Sandy Desert (Western Australia): 284,993 km2 (110,036 square miles). Tanami Desert (Western Australia and Northern Territory): 184,500 km2 (71,235 square miles). Each of these deserts is either in or primarily in Western Australia, in the western third of the continent.
Deserts of Australia. Named deserts of Australia cover 1,371,000 square kilometres (529,000 sq mi), or 18% of the Australian mainland. However, approximately 35% of the Australian continent receives so little rain it is effectively desert. The deserts in Australia are primarily distributed throughout the western plateau and interior lowlands of the continent.