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Global Volcanism Program | Image GVP-03295

The unvegetated Glass Creek lava flow on the left and Obsidian Flow on the right are among a group of obsidian lava flows and domes that were emplaced during a major eruption from the Inyo Craters about 600 years ago.  The eruption, originating from a shallow dike, began with powerful explosive activity, pyroclastic flows, and a series of phreatic explosions, and ended with effusion of the lava domes and flows. Photo by Larry Mastin, 1991 (U.S. Geological Survey).

The unvegetated Glass Creek lava flow on the left and Obsidian Flow on the right are among a group of obsidian lava flows and domes that were emplaced during a major eruption from the Inyo Craters about 600 years ago. The eruption, originating from a shallow dike, began with powerful explosive activity, pyroclastic flows, and a series of phreatic explosions, and ended with effusion of the lava domes and flows.

Photo by Larry Mastin, 1991 (U.S. Geological Survey).


Mono-Inyo Craters