Zapaleri is a volcano whose summit is the tripoint of the borders of Argentina, Bolivia and Chile.

[2] It is part of Potosí Department (Bolivia), Jujuy Province (Argentina), and Antofagasta Region (Chile).

[citation needed] The volcano formed on top of the 2.89 mya Tara Ignimbrite from the Guacha caldera[3] and the basement beneath the volcano is formed from Cretaceous and Tertiary rocks affected by tectonic deformation.

[6] The Bolivian portion of the mountain is protected within Eduardo Avaroa Andean Fauna National Reserve.

[citation needed] Zapaleri is associated with a major source of obsidian,[7] with a distribution sphere found in archeological sites over 350 kilometres (220 mi) wide.