Global Volcanism Program | Image GVP-04400
An explosive eruption about 2900 years ago produced widespread tephra and pyroclastic surges. Subsequently a group of four dacitic lava domes was constructed within Cuicocha caldera. This marks the latest known activity from the caldera. The eastern two domes are seen here from the SE rim of the caldera. The lava domes form two forested islands in the center of the 3-km-wide caldera.
Photo by Tom Pierson, 1992 (U.S. Geological Survey).