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Global Volcanism Program | Image GVP-02682

The recent history of Augustine has been characterized by repetitive failure of the summit of the volcano, producing debris avalanches that reached the sea on all sides of the island. This gully near the east shoreline exposes one of the earlier debris avalanche deposits. The Northeast Point debris avalanche deposit forms the headland in the distance. Most of the Augustine debris avalanches were sufficiently mobile to reach the sea and form rocky deposits. Photo by Lee Siebert, 1990 (Smithsonian Institution).

The recent history of Augustine has been characterized by repetitive failure of the summit of the volcano, producing debris avalanches that reached the sea on all sides of the island. This gully near the east shoreline exposes one of the earlier debris avalanche deposits. The Northeast Point debris avalanche deposit forms the headland in the distance. Most of the Augustine debris avalanches were sufficiently mobile to reach the sea and form rocky deposits.

Photo by Lee Siebert, 1990 (Smithsonian Institution).

Keywords: debris avalanche deposit | deposit | outcrop | exposure | geology


Augustine