A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Obsidian at Obsidian Dome, Inyo Volcanic Field, California, USA |
|---|---|
| Description | Obsidian Dome is a 600 year old (very young!) rhyolite dome near Mammoth Lakes in eastern California. It formed by rapid cooling of a viscous lava having the composition of a granite. The inner parts are relatively solid rhyolite, but the outer parts are a jumbled mass of boulders and rocks of various sizes. They cooled so quickly that most of the material is not crystalline. Here we see a large boulder that is mostly glass (obsidian). It also contains lesser amounts of gray pumice. |
| Chronostratigraphy | recent |
| Geologic province | Inyo Volcanic Field |
| Location | USA ▹ California ▹ Mono. Near Mammoth Lakes. Inyo National Forest. |
| Photographer | Dexter Perkins. 2001-05-22. |
| Collection | E121016991F. |
| Key words | Obsidian Dome, obsidian, pummice, Inyo, California |
| Tech details | 404 KB. Outcrop. |
| GeoDIL number | 561 |
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