Oxidized, reddish-colored rocks form much of the summit cone of Momotombo volcano, seen here from the NW towering more than a kilometer above one of several small ponds on the floor of Monte Galán caldera. The 4-km-wide caldera was the source of a major ignimbrite about 50,000 years ago.

Photo by Jaime Incer.

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

Momotombo