A mountain system of western South America extending more than 8,000 km (4,970 mi) from Venezuela to Tierra del Fuego parallel to the Pacific coast. The Andes rise at many points to more than 6,500 m (21,325 ft).
The sierra is the region of the Andes, and is about 250 m.
During the Tertiary period the great volcanoes of the Andes were formed, and there were smaller eruptions in the Sierras.
Not only has scientific study advanced at the university of Buenos Aires, but scientific research is promoting the development of the country; examples are the geographical explorations of the Andean frontier, and especially of the Patagonian Andes, by Francisco P. Moreno.
Chinchillas live in burrows, and these subterranean dwellings undermine the ground in some parts of the Chilean Andes to such an extent as to cause danger to travellers on horseback.
JALAP, a cathartic drug consisting of the tuberous roots of Ipomaea Purga, a convolvulaceous plant growing on the eastern declivities of the Mexican Andes at an elevation of 5000 to 8000 ft.