sedimentary

Weathered sandstone or iron-rich sedimentary rock

Likely ferruginous sandstone; exact identification is uncertain from the photograph

AI-generated identification · may be incorrect

Orange-yellow, earthy and dull, with a rough granular texture and apparent iron-oxide staining; likely Mohs hardness 5–7, no obvious cleavage, and moderate density. The orange coloration commonly comes from hematite or limonite/goethite cement.

Identified August 29, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand-sized grains lithified and were later oxidized or weathered in an oxygen-rich environment; age cannot be determined visually. Such material occurs in terrestrial and shallow-marine sedimentary formations.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and occasionally decorative specimens; this small weathered fragment has little commercial value.

Geological facts

Iron oxides can produce vivid red, orange, and yellow colors in sedimentary rocks. The crumbly outer surface suggests significant weathering or weak cementation.

Field identification & locations

Look for visible sand grains, gritty texture, layered structure, and orange streaking; a steel nail may scratch weak sandstone, while stronger quartz-rich sandstone resists scratching. Common worldwide, especially in arid and oxidizing environments.