The small Cerro El Colli is one of the youngest post-caldera domes of the Sierra La Primavera volcanic complex, immediately west of the city of Guadalajara. The dome, seen here from the south, has been dated to about 30,000 years and is the easternmost of several emplaced near the southern caldera rim. An 11-km-wide caldera formed as a result of the eruption of the 20 km³ Tala Tuff about 95,000 years ago. Fumaroles and hot springs are active throughout the volcanic complex.

Photo by Hugo Delgado-Granados, (Universidad Nacional Autónoma de México).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Keywords: lava dome

Sierra la Primavera