Atacama Desert in Chile

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The Atacama Desert is a plateau in South America, covering a 1,000-kilometre strip of land on the Pacific coast, west of the Andes mountains. It is the driest non-polar desert in the world.

It is the driest non-polar desert in the world. According to estimates, the Atacama Desert proper occupies 105,000 square kilometres (41,000 sq mi), or 128,000 square kilometres (49,000 sq mi) if the barren lower slopes of the Andes are included.Most of the desert is composed of stony terrain, salt lakes (salares), sand, and felsic lava that flows towards the Andes. Geographically, the aridity of the Atacama is explained by it being situated between two mountain chains (the Andes and the Chilean Coast Range) of sufficient height to prevent moisture advection from either the Pacific or the Atlantic Oceans, a two-sided rain shadow.

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