Global Volcanism Program | Image GVP-10157
The Teixcal lava flow is the brownish area extending diagonally from the lower left towards San Salvador volcano on the right horizon. It originated during an eruption in 1722 from the base of San Marcelino scoria cone, where this photo was taken. The lava is noted for its disequilibrium textures, where large orthopyroxene crystals are surrounded by olivine reaction rims. The half-forested, half-vegetated cone near the center is Cerro Alto, a scoria cone of Coatepeque caldera (out of view to the left).
Photo by Lee Siebert, 2002 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.