Vent Mountain, a post-caldera volcano that rises 450 m above the caldera floor, is the largest of a variety of volcanic features on the floor of the 10-km-wide caldera. In addition to Vent Mountain, the most prominent post-caldera features are Half Cone, on the NW side and a 1931 vent near the west rim. Lava flows, tuff cones, maars, cinder cones, and lava domes are all found within Aniakchak caldera. This view from the SW shows the east caldera rim, with The Gates, a steep-walled notch in the east rim, at the upper left.

Copyrighted photo by Katia and Maurice Krafft, 1978.

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Aniakchak