sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light grey; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific gravity: approx 2.0-2.6
- Hardness
- 6-7 on Mohs scale
- Color
- Tan, beige, or light grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Tan, beige, or light grey; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific gravity: approx 2.0-2.6
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Occurs in diverse environments like deserts, riverbeds, and beaches over millions of years.
Uses & applications
Commonly used in construction as a building material, paving, and decorative garden stone. Certain types are used as abrasive materials in industrial processes.
Geological facts
Sandstone records the history of Earth's landscape; the cross-bedding within sandstone layers can reveal ancient wind and water current patterns.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible grains. Often found in riverbeds or as rounded cobbles in landscaping. Look for layered structures in larger outcroppings.
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