View of the south inner wall of Cone E, a post-caldera vent structure at Okmok Caldera in the eastern Aleutians. Cone E formed during multiple eruptions that produced tephra and lava flows; it collapsed in a violent explosive eruption several hundred years ago to form this crater that now contains a small lake about 425 x 200 m across. The far wall exposes the insides of Cone E and consists of layers of lava, spatter, tephra, and cross-cutting feeder dikes, or frozen conduits for magma’s ascent to the surface.
Date: Sep 7th, 2004
Volcano(es): Okmok
Photographer: Neal, C. A.
URL: avo.alaska.edu/image/view/14124
Credit: Image courtesy of AVO/USGS.Volcano(es): Okmok
Photographer: Neal, C. A.
URL: avo.alaska.edu/image/view/14124
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.