Global Volcanism Program | Image GVP-11557
The Viejo-Porvenir complex is seen here rising above farmlands NE of the massif. The 2122-m-high Volcan Viejo is on the left and 2267-m-high Porvenir on the right. Volcán Viejo is not actually a volcano, but lies along the rim of the Chocosuela caldera and the Río Segundo erosional caldera. El Viejo is noted for an area of sulfur deposits and fumarolic activity that was prominent until about 1960, after which it decreased and stopped by 1975. Porvenir is a small stratovolcano with a summit crater containing a pyroclastic cone.
Photo by Eliecer Duarte (OVSICORI-UNA).