Cerro Napa

Cerro Napa is a Pliocene stratovolcano north of the Salar de Coposa, straddling the border between Bolivia and Chile.

The 20 km wide volcano rises about 1.4 km above its surrounding terrain and has a partially preserved summit crater. Part of its slopes are covered with pyroclastics; radiometric dating has yielded ages of 11.9 ± 0.6, 9.99 ± 0.1 and 1.38 million years ago. In the past the volcano was glaciated, with glaciers descending to elevations of 4050 m. This low elevation probably relates to the easterly position of the volcano and likely correlates to lake highstands in Salar de Coposa, Salar de Empexa and Salar de Huasco.