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).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.