sedimentary

Weathered sandstone fragment

Quartz-rich sandstone, likely arkose or lithic sandstone

AI-generated identification · may be incorrect

Tan to pink, fine- to medium-grained, dull to slightly silky surface with iron-oxide staining and possible thin lamination; mainly quartz and feldspar, with hardness around 6–7 for individual grains. The visible texture is consistent with clastic sedimentary rock, though the image is insufficient for confident mineral…

Identified August 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand accumulated, compacted, and cemented—commonly by silica, calcite, or iron oxides—during burial. Its geological age cannot be determined from the photograph; sandstone occurs from Precambrian to Recent deposits.

Uses & applications

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

Geological facts

The pink or brown coloration commonly comes from hematite coating or cement. Sandstone may preserve ripple marks, cross-bedding, fossils, or ancient dune and river environments.

Field identification & locations

Look for visible sand grains, gritty texture, and sedimentary layering; a hand lens and dilute acid test can help distinguish cement types. Common worldwide in river, coastal, desert, and marine formations.