sedimentary

Weathered sandstone

Quartz-rich sandstone; exact composition cannot be confirmed from the image

AI-generated identification · may be incorrect

Tan to rusty-brown, dull and visibly granular, with a rough, friable surface. Likely dominated by quartz grains (Mohs 7) with iron-oxide staining and possible clay or feldspar; crystal structure is not apparent in the whole rock.

Identified October 8, 2026More sedimentary →

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Physical properties

Formation & geological history

Sand grains were deposited and compacted into sedimentary rock, with iron oxides likely producing the rusty color during weathering. Its age and depositional setting cannot be determined from the image.

Uses & applications

Sandstone is used as building and paving stone, aggregate, and—in some varieties—as a reservoir rock. This small, weathered piece appears mainly suitable for a collection or teaching sample.

Geological facts

Iron oxides such as hematite or goethite commonly stain sandstone red, orange, or brown.

Field identification & locations

Look for sand-sized grains and a gritty texture; a hand lens can help distinguish grains from a fine-grained rock. Sandstone occurs worldwide in sedimentary basins; a precise identification requires close examination or testing.