Global Volcanism Program | Image GVP-03290
South Inyo Crater, one of a chain of small phreatic explosion craters at the southern end of the Inyo Craters chain of lava domes and flows, is partially filled by a shallow lake. The 200-m-wide South Inyo Crater was formed when groundwater interacted with magma from a shallow dike. That interaction fed a powerful explosive eruption that concluded with the emplacement of obsidian lava domes and flows to the north of this crater.
Photo by Larry Mastin, 1992 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.