Salar de Uyuni

Salar de Uyuni is the world’s largest salt flat, a vast mineral crust on Bolivia’s Altiplano formed from ancient lakes.

Lake Minchin: A prehistoric lake that covered parts of the Altiplano during the Pleistocene. Its desiccation helped leave the saline deposits beneath and around the salar.
Lithium extraction: The processes used to obtain lithium from mineral deposits or lithium-rich brines. Projects around the salar seek lithium for batteries, though commercial production faces technical and environmental constraints.
Incahuasi Island: A rocky island near the center of Salar de Uyuni, covered with giant cacti. Its volcanic rock and vegetation rise conspicuously above the otherwise level salt crust.
Lithium triangle: A lithium-rich region spanning parts of Bolivia, Chile, and Argentina around the Andes. Uyuni is one of its major brine deposits and a focal point of resource policy.
Pleistocene: The geological epoch from about 2.58 million to 11,700 years ago, marked by repeated glaciations. Major lakes in the Altiplano expanded and receded during this epoch, leaving deposits in the salar basin.
Lake Tauca: A large late-Pleistocene lake that occupied the southern Altiplano. Its retreat contributed to the formation of the modern salt-flat basin.
Brine evaporation: A method of concentrating dissolved minerals by allowing water to evaporate from brine. Traditional lithium proposals at Uyuni have relied on evaporation ponds, despite the region’s rainy season.
Tunupa Volcano: A dormant volcano on the northern edge of Salar de Uyuni. Its slopes overlook the salar and contain archaeological sites and local cultural traditions.
Water scarcity: A condition in which available freshwater cannot meet human and ecological needs. Lithium development and tourism raise concerns in an already arid high-altitude region.
Lake Ballivián: A prehistoric lake that occupied parts of the central Andes during the Pleistocene. It is among the ancient lake stages associated with the geological history of the Altiplano basin.

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