Global Volcanism Program | Image GVP-10051
Flat-topped Cerro Alto (right center), a 953-m-high cinder cone on the SE flank of Coatepeque caldera, is seen here from the southern rim of the caldera. Basaltic lava flows were erupted from the eastern side of the cinder cone. Cerro Alto predates formation of Coatepeque caldera and is blanketed by deposits from the caldera-forming eruptions. San Salvador volcano to the east forms the left horizon.
Photo by Lee Siebert, 2002 (Smithsonian Institution).