The light-colored area just below the right horizon is the floor of the 15 x 21 km Los Humeros caldera. It is seen here from the SE across the Serdán-Oriental basin from the flanks of Cofre de Perote volcano. Caldera formation during the mid-Pleistocene was followed by extrusion of voluminous lava flows during the late-Pleistocene or Holocene. These flows form the dark-colored area extending across the basin. The peak in the distance to the left is Cerro Pizarro.

Photo by Lee Siebert, 1999 (Smithsonian Institution).

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

Keywords: caldera

Los Humeros