Global Volcanism Program | Image GVP-02636
The snow-covered ridge at the right in this view from the south of Mount Griggs is the margin of a large, 1.5-km-wide breached crater formed during the early Holocene during collapse of the volcano's summit. Remnants of the resulting debris-avalanche deposit reach WSW across the valley to Broken Mountain. The young central cone on the center skyline filled the collapse amphitheater and displays nested craters.
Copyrighted photo by Katia and Maurice Krafft, 1978.
Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.