
Popocatepetl in eruption, July 2013. Photo courtesy Science Times. http://www.isciencetimes.com/articles/5617/20130712/popocatepetl-volcano-erupts-mexico-city-ash.htm
Popocatepetl in eruption, July 2013. Photo courtesy Science Times. http://www.isciencetimes.com/articles/5617/20130712/popocatepetl-volcano-erupts-mexico-city-ash.htm
Rincón de la Vieja Active Crater. The walls expose thick sequences of oxidized and hydrothermally altered pyroclastic deposits and light-colored lava flows. (© Bernhard Edmaier, via “Bilder von der Erde” [Images of the Earth])