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Obsidian Dome
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Photographer: Ron Wolf
ID: 0000 0000 0909 0629 (2009-09-07)Copyright © 2009 Ron Wolf
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Aug 30, 2009
location
Obsidian Dome. Inyo National Forest (Mono County, California, US)notes This volcanic vent is one of several in the Eastern Sierra that erupted during a period of increased activity about 600 years ago. It extruded a viscous mass of obsidian (black volcanic glass) that rises about 300 feet above the surrounding terrain. Because of its extreme viscosity, the obsidian piles up in these mounds or domes rather than flowing horizontally. As the mass cooled, the surfaced cracked into large angular blocks, forming piles of talus on the top and sides of the dome.keywords: eruption, Holocene, Sierra, volcanic vent, volcanism, volcano, geomorphology
camera Canon 40D, 15mm, f/18, 1/400 sec.
photo category: Misc. - geology
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Using this photo The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2009 Ron Wolf.
For other uses, or if you have questions, contact Ron Wolf RonWolf[AT]EyeOnNature.com. (Replace the [AT] with the @ symbol before sending an email.) |
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