sedimentary
Sandstone
Arenite (SiO2 based)
Hardness: 6-7 Mohs; Color: Tan, beige, reddish-pink; Luster: Dull/Earthy; Texture: Gritty/Grainy; Structure: Clastic
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, reddish-pink
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, reddish-pink; Luster: Dull/Earthy; Texture: Gritty/Grainy; Structure: Clastic
Formation & geological history
Formed from the accumulation of mineral particles or rock fragments (sand) that are cemented together by minerals like silica or calcium carbonate over millions of years, typically in desert or marine environments.
Uses & applications
Widely used as a construction material, for architectural cladding, grindstones, and as a reservoir rock in the petroleum industry.
Geological facts
Sandstone makes up about 10 to 25 percent of all sedimentary rocks on Earth. It often preserves fossils and ripple marks from ancient currents.
Field identification & locations
Identify by its 'sandpaper' feel and visible grains. Common in arid regions and coastal cliffs. Essential for understanding paleoclimates.
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Brown Sandstone (River Rock)
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