The Andes are made up by the two Cordillera mountain chains and are separated by the Altiplano plateau. This account is a description of an area from the axis of the Western Cordillera to the foothills of the Eastern Cordillera at the latitude of Lake Titicaca. It looks at stratigraphy, structure, mineral deposits and volcanic geochemistry, putting them into the context of the evolution of the Andes.
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