The Bolivian Andes is composed primarily of two ranges or cordilleras. The Cordillera Occidental is characterized by volcanic activity. The much older Cordillera Oriental, known as the "Cordillera Real," is an impressive snow-capped series of granite mountains.
Andean Geographic Region
The Chilean Andes and Argentine Andes form most of the border between Chile and Argentina and make up the highest section of the Andes range. The Dry Andes and Wet Andes, along with the Patagonian Andes and Fuegian Andes, are climatic and glaciological subdivisons.
The Andean Natural Region is the most populated natural region of Colombia, containing most of the country's urban centers. The Colombian Andes consists of three parallel mountain chains: Cordillera Occidental, Cordillera Central and Cordillera Oriental.
The Cordillera Blanca is a mountain range in Peru that is part of the larger Andes mountain system. It is located in the north-central part of the Cordillera Occidental (the westernmost part of the Peruvian Andes) and is the world's highest tropical mountain range.
The Cordillera Negra, is part of the Cordillera Occidental, one of three ranges in the Peruvian Andes system of west-central Peru. The range has rocky peaks with very little winter snowfall. The gullies of the range are gloomy, dark and mostly dry.
The Cordillera Vilcanota is a mountain range in southeastern Peru that constitutes one of the southern branches of the Cordillera Occidental. Vinicunca, or "Rainbow Mountain," is a natural landmark. Ausangate, with significance in Incan mythology, is the tallest peak in the range.
The Ecuadorian Andes are divided into parallel volcanic cordilleras that form the central Andean highlands region of Ecuador. This Sierra natural region contains ten major basins that contain roughly half of Ecuador’s population.
The Peruvian Andes, part of the greater Andes system of South America, are formed by three main cordilleras that traverse the entire country. The Sierra natural region features fertile river valleys, high plains, deep canyons and the Altiplano plateau.
The Ring of Fire is an area in the Pacific Ocean basin where earthquakes and volcanic eruptions occur as a result of the movement and collision of lithospheric tectonic plates. The Andean Volcanic Belt is a major volcanic belt along the South American coast.
The Tropical Andes is a region that runs through Venezuela, Colombia, Ecuador, Peru and Bolivia, spanning more than 580,000 sq mi. The Tropical Andes is the most biologically diverse of all recognized hotspots and contains about one-sixth of all plant life on Earth.