THE HOT DESERTS
Deserts are dry, barren areas where less than 25cm of rain falls each year. They are mostly located in tropical areas, between about 15o and 30o north and south of the Equator.
Deserts are found in areas where dry winds blow
across the land. These can be a long way from the sea, where moist sea
winds do not reach (e.g. the Gobi desert in Asia). They can also be in
areas separated from the sea by high mountains, called the rainshadow
(e.g. the Atacama desert in Chile).
There is little to protect a desert from the action of the
wind. Strong winds pick up fine surface debris and blast it again exposed rock,
eroding it away to form rock pillars and isolated hills - such as Ayers Rock
(Uluru) in Australia.
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