Global Volcanism Program | Image GVP-06104
Fayal volcano is capped by a 2-km-wide, 400-m-deep summit caldera, seen here from its southern rim. A small pyroclastic cone (center) and a dark lake (right) can be seen on the floor of the caldera. The caldera was formed incrementally, beginning with a large eruption about 1,000 years ago. Thick airfall-pumice and pyroclastic-flow deposits related to this eruption cover the island.
Photo by Rick Wunderman, 1997 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.