sedimentary
Sandstone
Arenite (SiO2 primarily)
Hardness: 6-7 (Mohs scale), Color: tan, brown, or buff, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains.
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, brown, or buff, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains.
Formation & geological history
Formed over millions of years through the accumulation and cementation of sand-sized mineral particles or rock fragments in river, ocean, or desert environments.
Uses & applications
Extensively used as a building material, paving stone, decorative landscaping stone, and in the production of glass and industrial abrasives.
Geological facts
Sandstone is highly porous and often acts as a natural aquifer for groundwater or a reservoir for petroleum and natural gas.
Field identification & locations
Identify in the field by its gritty texture (feels like sandpaper) and distinct layering or cross-bedding. Common in canyons and desert plateaus.
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