sedimentary
Sandstone
Arenite (Sedimentary Rock)
Hardness: 6-7 Mohs; Color: Tan, beige, or yellow-green; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, or yellow-green
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, or yellow-green; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) the size of sand (0.06 to 2 mm). Often deposited in riverbeds, deltas, or beaches over millions of years.
Uses & applications
Widely used in construction for paving and building facades, manufacture of glass (if high silica), and as a reservoir rock for groundwater and oil.
Geological facts
Sandstone is one of the most common sedimentary rocks on Earth. It often preserves fossils and ripple marks from ancient waterway currents.
Field identification & locations
Identify by its gritty, abrasive texture (feels like sandpaper) and visible sand grains. Found globally in sedimentary basins and canyons.
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