Global Volcanism Program | Image GVP-09628
A broad depression breached widely to the NE (right) cuts the summit of Turrialba, the easternmost Holocene volcano in Costa Rica. The upper part of the depression is partially filled by a smaller edifice with a roughly 1.3-km-wide crater, within which three smaller craters aligned NE-SW have formed. The three young craters erupted during the 18th-19th centuries; the walls of the two SW-most craters display broad areas of light-colored, hydrothermally altered rocks. Fumarolic activity continues at these craters.
Photo by Federico Chavarria Kopper, 1999.