Altiplano

Altiplano
TBjornstad 18:03, 25 November 2006 (UTC) · Public domain · source
Name	Altiplano
Other name	Andean Plateau
Elevation m	3,750
Elevation ft	12,300
Length km	1,000
Width km	200
Area km2	200,000
Coordinates	16, S, 69, W...
Location	Bolivia, Peru, Chile, Argentina
Type	Plateau
Embedded	Andes

Altiplano. It is one of the world's most extensive high plateaus, located in west-central South America where the Andes mountains are at their widest. This vast, windswept plain lies predominantly within Bolivia and Peru, with smaller extensions into Chile and Argentina. The region's extreme altitude, unique geology, and climatic conditions have fostered distinctive ecosystems and a rich, enduring human history centered on ancient cultures and modern resource extraction.

Geography and geology

The Altiplano is a high-altitude basin sandwiched between two major cordilleras of the Andes: the volcanic Cordillera Occidental to the west and the folded Cordillera Oriental to the east. Its formation is primarily the result of tectonic compression and uplift during the Cenozoic era, with significant volcanic activity shaping the western rim. The plateau's surface is characterized by extensive salt flats, such as the renowned Salar de Uyuni, and numerous endorheic basins that trap water. Other prominent geographical features include the Lake Titicaca basin, the highest navigable lake in the world, and the Silala river basin, a subject of international dispute between Bolivia and Chile.

Climate and hydrology

The climate is cold and semi-arid, with dramatic diurnal temperature fluctuations and low annual precipitation, influenced by the rain shadow effect of the Cordillera Occidental. Most rainfall occurs during the brief Bolivian winter, a convective season. The hydrology is dominated by a closed drainage basin system; water from seasonal rivers and rainfall collects in shallow lakes like Lake Poopó or vast salt flats, where it evaporates. Lake Titicaca is the largest permanent freshwater body, fed by glaciers from the Cordillera Real and draining south via the Desaguadero River. The scarcity of water outflow to the ocean defines the region's fragile aquatic ecosystems.

Flora and fauna

Vegetation is predominantly puna grassland, consisting of hardy grasses like ichu and low-growing shrubs adapted to the cold, dry conditions and high ultraviolet radiation. Scattered Polylepis woodlands, one of the highest-growing tree genera in the world, survive in sheltered valleys. Fauna includes specialized camelids such as the wild vicuña and domesticated llama and alpaca, which have been integral to human settlement for millennia. Notable bird species are the flightless Darwin's rhea, the giant Andean condor, and several flamingo species that inhabit the saline lakes, including the James's flamingo. The endangered Andean cat is one of the plateau's most elusive predators.

Human history and settlement

The region has been continuously inhabited for millennia, with the Tiwanaku empire emerging as a major pre-Columbian power centered near Lake Titicaca around 500 AD. Later, it became a crucial southern province of the Inca Empire, connected by the extensive Inca road system. Following the Spanish conquest of the Inca Empire, the area was incorporated into the Viceroyalty of Peru and later the Viceroyalty of the Río de la Plata, with Potosí and its legendary Cerro Rico silver mountain driving global economies. The War of the Pacific in the late 19th century resulted in Chile annexing the coastal territory, leaving Bolivia landlocked. Major cities today include El Alto, La Paz, and Puno.

Economic activities

Mining has been the cornerstone of the economy since the colonial era, with Potosí historically producing vast quantities of silver. Modern extraction focuses on tin, silver, lithium—particularly from the Salar de Uyuni—and copper from mines like Chuquicamata in Chile. Agriculture is largely subsistence-based, reliant on the cultivation of hardy crops like potato and quinoa, and pastoralism of llama and alpaca herds. Tourism is growing, centered on the Salar de Uyuni, Lake Titicaca, and archaeological sites like Tiwanaku. Manufacturing and services are concentrated in urban centers such as La Paz and Arequipa. Category:Plateaus of South America Category:Geography of Bolivia Category:Geography of Peru Category:Regions of the Andes