sedimentary
Sandstone
Arenite (SiO2 dominant)
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale (due to quartz composition); Color: Tan, brownish-orange, light gray, with iron staining; Luster: Dull, earthy; Texture: Medium-grained, granular, feels like sandpaper; Cleavage: None
- Hardness
- 6-7 on Mohs scale (due to quartz composition)
- Color
- Tan, brownish-orange, light gray, with iron staining
- Luster
- Dull, earthy
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Physical properties
Hardness: 6-7 on Mohs scale (due to quartz composition); Color: Tan, brownish-orange, light gray, with iron staining; Luster: Dull, earthy; Texture: Medium-grained, granular, feels like sandpaper; Cleavage: None
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments (predominantly quartz and feldspar) in fluvial, desert, or marine environments.
Uses & applications
Widely used as a construction material, flagstone, paving stone, decorative landscaping rock, and historically for grinding stones and architecture.
Geological facts
Sandstone is highly porous and permeable, making it one of the most important aquifer rocks for groundwater as well as primary reservoirs for petroleum and natural gas.
Field identification & locations
Identified by its sandy, abrasive texture when rubbed and visible sand grains held together by mineral cement. Extremely common worldwide in riverbeds, canyons, and sedimentary basins.
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