El Azufre volcano (center) is the central peak of the Tres Vírgenes volcanic complex. Its summit lies about 4 km N of the highest peak of the complex, La Vírgen (left). The small peak immediately to the right of El Azufre is El Viejo, the oldest edifice of the complex. El Viejo was constructed SW of the Pleistocene El Aguajito caldera, partly visible on the far-right horizon. Both El Viejo and El Azufre are composed of lava domes and flows.

Photo by Marjorie Summers, 1987 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Tres Vírgenes