$Sandstone (with prominent jointing/fractures) (Arenite (composed primarily of SiO2)) — sedimentary$

sedimentary

Sandstone (with prominent jointing/fractures)

Arenite (composed primarily of SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (if silica-cemented); Color: tan, buff, or light brown; Luster: earthy or dull; Crystal structure: granular clastic texture; Specific gravity: 2.2-2.8.

Hardness: 6-7 (if silica-cemented)
Color: tan, buff, or light brown
Luster: earthy or dull

Identified March 28, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (if silica-cemented); Color: tan, buff, or light brown; Luster: earthy or dull; Crystal structure: granular clastic texture; Specific gravity: 2.2-2.8.

Formation & geological history

Formed from the accumulation and lithification of sand-sized mineral particles or rock fragments. The prominent linear features shown are joints/fractures caused by tectonic stress or unloading. Most common in Paleozoic to Mesozoic strata.

Uses & applications

Primary use in construction as aggregate, dimension stone for buildings, and as a reservoir rock for petroleum, natural gas, and groundwater aquifers.

Geological facts

Sandstone makes up approximately 20-25% of all sedimentary rocks on Earth. The Antelope Canyon in Arizona is a world-famous example of sculpted sandstone formations.

Field identification & locations

Identify in the field by its 'sandpaper' feel when rubbed and visible layers (bedding planes). Frequently found in canyon walls, cliffs, and quarries across the American Southwest and sedimentary basins globally.