sedimentary

Weathered sandstone

Clastic sandstone, primarily quartz and feldspar grains cemented by silica, calcite, or iron oxides

AI-generated identification · may be incorrect

Typically Mohs 6–7 for quartz grains, with a rough, granular texture, dull to earthy luster, tan-brown color, and no consistent cleavage. The visible surface appears weathered and iron-stained; grain size and cement are difficult to confirm from the image.

Identified August 27, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand accumulated, compacted, and cemented in rivers, beaches, deserts, or shallow marine settings; age cannot be determined visually. Weathering has produced the rounded edges and brown oxidation colors.

Uses & applications

Used as building stone, paving, aggregate, and decorative stone; attractive varieties are used for architectural features and landscaping. This unremarkable specimen likely has little commercial use.

Geological facts

Sandstone commonly preserves ripple marks, cross-bedding, mud cracks, and fossils, which can reveal its depositional environment. Iron-oxide cement commonly produces reddish, yellowish, or brown coloration.

Field identification & locations

Identify it by visible sand grains, gritty texture, and inability to fizz strongly in dilute acid unless calcite-cemented; a hand lens and streak/fresh-break inspection would help. Common worldwide, especially in sedimentary basins and eroding cliffs.