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Global Volcanism Program | Image GVP-02691

The vegetated terrain seen here is the surface of the Rocky Point debris avalanche deposit, produced by collapse of the summit of Augustine about 250-450 years ago. The avalanche traveled into Cook Inlet, visible at the upper left with the Chigmit Mountains in the background, for a distance of 8 km and extended the shoreline by 2 km. Photo by Lee Siebert, 1990 (Smithsonian Institution).

The vegetated terrain seen here is the surface of the Rocky Point debris avalanche deposit, produced by collapse of the summit of Augustine about 250-450 years ago. The avalanche traveled into Cook Inlet, visible at the upper left with the Chigmit Mountains in the background, for a distance of 8 km and extended the shoreline by 2 km.

Photo by Lee Siebert, 1990 (Smithsonian Institution).

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


Augustine