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Obsidian, Lake County, Oregon

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Title: Obsidian, Lake County, Oregon

Caption: Obsidian is volcanic glass. It forms when magma (molten rock) is ejected into the air during volcanic activity and chills (cools) so quickly that mineral crystals do not have a chance to form. Obsidian breaks with the conchoidal fracture characteristic of all glass. It is usually black, but may have bands or inclusions that create various optical effects, including a reflective 'sheen' in silver, gold or even rainbow colors.

Credit: Album / Science Source / JOEL AREM

Releases: ? Model Release: No - ? Property Release: No
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Image size: 3851 × 2550 px | 28.1 MB

Print size: 32.6 × 21.6 cm | 1516.1 × 1003.9 in (300 dpi)

Keywords: ACTIVITY • AREM • COLLECTION • CONCHOIDAL • COOLING • FEATURE • FRACTURE • GEOLOGIA • GEOLOGIC • GEOLOGICAL • GEOLOGY • GLASS • GRAIN • GRAINS • HISTORY • IGNEOUS • MAGMA • MINERALOGY • OBSIDIAN • PROPERTIES • REPORTAGE • ROCK • ROCKS • SHEEN • SIZE • SPECIMEN • TEXTURE • VOLCANIC • VOLCANIC_ERUPTION • VOLCANOES • VOLCANOS