sedimentary

Weathered sandstone

Quartz-rich sandstone, chiefly SiO₂ with feldspar and lithic grains

AI-generated identification · may be incorrect

Pale tan, fine- to medium-grained, dull earthy luster, and apparently massive with weak or obscured bedding; individual grains are visible. Hardness is approximately 6–7 for quartz grains, with variable rock durability; cleavage is absent and specific gravity is typically 2.2–2.7.

Identified August 16, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand accumulated, was compacted, and cemented by silica, calcite, or iron oxides; the exact age cannot be determined from the image. Surface weathering has rounded and lightened the specimen.

Uses & applications

Used as building stone, paving, aggregate, and occasionally decorative stone; attractive varieties are collected but are generally low-value.

Geological facts

Sandstone commonly preserves cross-bedding, ripple marks, fossils, or iron-stained layers, though none are clear here. Its visible granular texture distinguishes it from many massive igneous rocks.

Field identification & locations

Likely identifiable by gritty texture, visible sand grains, and scratching glass if quartz-rich; acid testing can reveal calcite cement. Common worldwide in sedimentary basins, especially deserts, rivers, beaches, and shallow seas.