alb3846225

Scoria, Klamath Falls, Oregon

Volcanic activity causes magma (molten rock) to be violently ejected at the earth's surface. If magma cools slowly, as in a lava flow, a dense rock known as basalt may be the result; if cooling is extremely rapid, a volcanic glass such as obsidian may result. Gas bubbles trapped in magma are released in the same way as the carbonation in soft drinks when a container is opened. An extreme example of this is scoria, a dark rock created by the rapid cooling of basaltic magma that is filled with expanding gas bubbles.

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Title: Scoria, Klamath Falls, Oregon

Caption: Volcanic activity causes magma (molten rock) to be violently ejected at the earth's surface. If magma cools slowly, as in a lava flow, a dense rock known as basalt may be the result; if cooling is extremely rapid, a volcanic glass such as obsidian may result. Gas bubbles trapped in magma are released in the same way as the carbonation in soft drinks when a container is opened. An extreme example of this is scoria, a dark rock created by the rapid cooling of basaltic magma that is filled with expanding gas bubbles.

Credit: Album / Science Source / JOEL AREM

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Image size: 3800 × 2550 px | 27.7 MB

Print size: 32.2 × 21.6 cm | 1496.1 × 1003.9 in (300 dpi)

Keywords: ACTIVITY • AREM • BASALT • BASALTIC • BUBBLES • CARBONATION • COLLECTION • COOLING • FEATURE • GAS • GEOLOGIA • GEOLOGIC • GEOLOGICAL • GEOLOGY • GLASS • GRAIN • GRAINS • HISTORY • IGNEOUS • MAGMA • MINERALOGY • OBSIDIAN • PROPERTIES • REPORTAGE • ROCK • ROCKS • SCORIA • SIZE • SPECIMEN • TEXTURE • VOLCANIC • VOLCANIC_ERUPTION • VOLCANOES • VOLCANOS