sedimentary

Weathered iron-stained rock, likely sandstone

Iron-oxide-stained quartz-rich sandstone (tentative identification)

AI-generated identification · may be incorrect

Tan to brown with rusty orange patches and a rough, granular surface; likely composed mainly of quartz with iron oxides. Hardness and cleavage cannot be confirmed from the image; sandstone is typically Mohs 6–7 for its quartz grains and has no mineral cleavage.

Identified September 26, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely formed when sand grains were compacted and cemented, then stained by iron-bearing groundwater during weathering. Its age and exact formation environment cannot be determined from the photograph.

Uses & applications

Ordinary material may be used as building or landscaping stone; this small, unverified specimen has little commercial value.

Geological facts

The orange-brown coloration is commonly caused by hematite or goethite coating or cementing the grains.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; a close-up or scratch test would help distinguish sandstone from other weathered rocks. Similar rocks occur widely wherever sedimentary formations are exposed.