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Global Volcanism Program | Image GVP-05351

This outcrop exposes a thick pyroclastic flow deposit from an eruption that formed a small caldera on the eastern edge of Black Peak volcano. This major eruption occurred about 4,200 to 4,700 years ago and filled adjacent valleys to depths of up to 100 m. The ice-free caldera on the highly eroded volcano contains two small lakes and a complex of lava domes. Photo by Tom Miller, 1985 (Alaska Volcano Observatory, U.S. Geological Survey).

This outcrop exposes a thick pyroclastic flow deposit from an eruption that formed a small caldera on the eastern edge of Black Peak volcano. This major eruption occurred about 4,200 to 4,700 years ago and filled adjacent valleys to depths of up to 100 m. The ice-free caldera on the highly eroded volcano contains two small lakes and a complex of lava domes.

Photo by Tom Miller, 1985 (Alaska Volcano Observatory, U.S. Geological Survey).

Keywords: outcrop | geology | stratigraphy | deposit


Black Peak