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This fissure is located about 200 m southeast of the South Inyo Crater, and cuts through a lava flow that was erupted more than 100,000 years ago. Geologists have been able to match the edges of gas bubbles (vesicles) exposed on the surfaces of the flow on boths sides of the fissure. The separation of this fissure is about 2.7 m. When similar fissure openings are added together, the total widening or extension in this area is more than 30 m. At least some of this extension occurred about 600 years when a dike intruded beneath Deer Mountain and the Inyo craters. |
