Everything about The Simpson Desert totally explained
The
Simpson Desert occupies approximately 176,500 square kilometres of central
Australia. It is bounded to the west by the
Finke River and
Mabel Range, to the north by
Adam Range, to the east by the
Georgina and
Diamantina Rivers, with
Lake Eyre to the south. Average annual rainfall is less than 200 mm.
The Simpson Desert is underlain by the
Great Artesian Basin,
water from which rises to the surface at numerous natural springs, including
Dalhousie Springs, and at
bores drilled along stock routes, or during
gas and oil exploration. As a result of exploitation by such bores, the flow of water to springs has been steadily decreasing in recent years.
The Simpson Desert is an
erg which contains the world's longest parallel
sand dunes. These north-south oriented dunes are static, held in position by vegetation. They vary in height from 3 metres in the west to around 30 metres on the eastern side. The most famous dune,
Nappanerica, or, more popularly,
Big Red (named by Simpson Desert traveller Dennis Bartell), is 40 metres in height.
The explorer
Charles Sturt, who visited the region in 1845, was the first
European to see the desert, but it wasn't until 1936 that
Ted Colson became the first white man to cross it in its entirety. The name Simpson Desert was coined by
Cecil Madigan in 1939, after
Alfred Allen Simpson, an Australian philanthropist, geographer, and president of the Royal Geographical Society of S.A.
No maintained roads cross the desert. However, there are tracks that were made during seismic surveys in the search for gas and oil during the 1960s and 1970s. These include the French Line, the Rig Road, and the QAA Line. Such tracks are still navigable by well-equipped four-wheel-drive vehicles which must carry extra fuel and water. Towns providing access to the edge of the Simpson Desert include
Oodnadatta to the southwest, and
Birdsville in the east. A section of the Commonwealth Railways
Trans-Australian line passes through the western side of the Simpson Desert.
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