igneous
Weathered vesicular volcanic rock, possibly scoria
Likely basaltic scoria (vesicular basalt); exact identification requires examination
AI-generated identification · may be incorrectRough, brown-yellow weathered surface with dark cavities and an irregular, porous texture. Likely chiefly plagioclase and pyroxene, possibly olivine; hardness about 5–6 Mohs, typically dull luster and no prominent cleavage.
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Physical properties
Rough, brown-yellow weathered surface with dark cavities and an irregular, porous texture. Likely chiefly plagioclase and pyroxene, possibly olivine; hardness about 5–6 Mohs, typically dull luster and no prominent cleavage.
Formation & geological history
Forms when gas-rich basaltic lava cools quickly, trapping bubbles; its age and precise volcanic setting cannot be determined from the image.
Uses & applications
Scoria is used as lightweight aggregate, landscaping stone, and drainage material; this weathered specimen appears primarily suitable for collecting or display.
Geological facts
The visible holes may be gas bubbles (vesicles), a common feature of scoria, though weathering can also create cavities.
Field identification & locations
Look for a lightweight, vesicular texture and dark, fine-grained interior on a fresh break; scoria is found near basaltic volcanoes worldwide. The specimen’s brown color may reflect surface oxidation or weathering.
