Global Volcanism Program | Image GVP-02638
Kaguyak caldera was formed following powerful dacitic explosive eruptions about 5800 years ago. An extensive apron of pyroclastic-flow deposits surrounds the 2.5-km-wide caldera. This view from the SW shows two post-caldera lava domes that form a peninsula into the lake and another lava dome that forms a small island that rises about 10 m above the center of the lake. The low notch at the far end of the caldera is a pre-caldera stream valley that was beheaded by caldera formation.
Copyrighted photo by Katia and Maurice Krafft, 1978.