sedimentary
Sandstone
Arenite (SiO2 based)
Hardness: 6-7 Mohs; Color: Tan, beige, or yellowish-brown; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, or yellowish-brown
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, or yellowish-brown; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation and cementation of mineral particles or rock fragments (sand) over millions of years, typically in desert, river, or ocean environments.
Uses & applications
Used primarily as a building material, in paving, for making glass, and as a reservoir rock for oil and natural gas.
Geological facts
Sandstone makes up about 10-20% of all sedimentary rocks on Earth. The famous red rocks of the Grand Canyon are primarily composed of various sandstone layers.
Field identification & locations
Identify in the field by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in basins and coastal regions.
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