Most of the 3.5-km-wide caldera floor of Black Peak volcano, located NW of Chignik Bay, contains the complex of lava domes seen here. The ice-free mid-Holocene caldera contains two small lakes. Pyroclastic flow and block-and-ash-flow deposits from the caldera-forming eruption filled the Ash Creek and Bluff Creek valleys to the west and north less than about 4,000 years ago.

Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey, 1979.

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Lava Domes

Keywords: lava dome | caldera

Black Peak