sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
Hardness: 6-7 (Mohs scale); Color: Tan, brown, yellow; Luster: Dull to earthy; Structure: Clastic, fine to medium-grained; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs scale)
- Color
- Tan, brown, yellow
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Tan, brown, yellow; Luster: Dull to earthy; Structure: Clastic, fine to medium-grained; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in deserts, riverbeds, or beaches over millions of years.
Uses & applications
Commonly used as a building material, in paving, for making whetstones, and in the production of glass (if high silica).
Geological facts
Sandstone serves as a primary reservoir for underground water and petroleum because of its natural porosity and permeability.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. It is extremely common worldwide in sedimentary basins and canyonlands.
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