sedimentary

Weathered sandstone

Quartz-rich clastic sandstone, likely iron-oxide stained

AI-generated identification · may be incorrect

Tan to orange, earthy and dull to slightly sugary luster, with visibly granular texture; mostly quartz with feldspar and iron-oxide cement. Hardness is roughly 6–7 for grains, but the rock may crumble; no obvious cleavage, specific gravity about 2.2–2.7.

Identified September 20, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand accumulated, was compacted, and cemented—probably during a Paleozoic or Mesozoic sedimentary episode, though age cannot be determined from the image. Orange coloration commonly reflects oxidation of iron-bearing minerals during weathering.

Uses & applications

Used as building stone, paving, aggregate, and decorative landscaping material; attractive pieces may be collected, but this specimen has little commercial value.

Geological facts

Sandstone preserves depositional structures such as bedding, cross-bedding, and ripple marks, although none are clearly visible here. Iron-oxide staining can produce vivid red, yellow, and orange tones.

Field identification & locations

Identify it by its gritty sand-sized grains, uneven fracture, and tendency to scratch glass; dilute acid should cause little or no reaction unless carbonate cement is present. Common worldwide in former deserts, beaches, river channels, and sedimentary basins.