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Global Volcanism Program | Image GVP-02670

Augustine, seen here from the NW, is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping lava domes surrounded by an apron of volcaniclastic debris that descend to the sea on all sides. The hummocky deposit in the foreground is a roughly 450-year-old debris avalanche deposit, one of many that surround the island as a result of repetitive collapse of the summit lava dome. Twentieth-century eruptions have included explosive activity with pyroclastic flows and lava dome extrusion. Photo by Lee Siebert, 1987 (Smithsonian Institution).

Augustine, seen here from the NW, is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping lava domes surrounded by an apron of volcaniclastic debris that descend to the sea on all sides. The hummocky deposit in the foreground is a roughly 450-year-old debris avalanche deposit, one of many that surround the island as a result of repetitive collapse of the summit lava dome. Twentieth-century eruptions have included explosive activity with pyroclastic flows and lava dome extrusion.

Photo by Lee Siebert, 1987 (Smithsonian Institution).

Keywords: plume | gas | gas plume | stratovolcano | emissions | deposits | debris avalanche deposit


Augustine