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.
Some deserts, however, are located on the west coasts of continents, such as the Namib in Africa, or the Atacama in Chile, forming coastal fog-deserts whose aridity is the result of cold oceanic currents.The deserts of the world occur in six global bio-geographical realms:frotropic deserts are found in the sub-Saharan part of Africa, and in the southern fringe of the Arabian Peninsula. Pressures on the ecosystem from humans are relatively high, especially in the Horn of Africa and Madagascar.