sedimentary
Sandstone
Arenite (primarily SiO2)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs); Color: Tan, brown, or rust-red; Luster: Dull/Earthy; Structure: Clastic granular texture; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs)
- Color
- Tan, brown, or rust-red
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Mohs); Color: Tan, brown, or rust-red; Luster: Dull/Earthy; Structure: Clastic granular texture; 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 in environments like deserts, riverbeds, or ocean floors.
Uses & applications
Used widely in construction for masonry, paving, and decorative garden features. High-purity silica sandstone is used in glass manufacturing.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. Its porosity makes it a critical reservoir rock for groundwater and petroleum.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. Common in arid regions and canyon landscapes like the Southwestern United States.
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