sedimentary
Sandstone (with secondary weathering/concretion)
Arenite (composed primarily of Quartz, SiO2)
AI-generated identification · may be incorrectHardness: 6-7 (Quartz grains); Color: Tan/Grey; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; SG: 2.2-2.8.
- Hardness
- 6-7 (Quartz grains)
- Color
- Tan/Grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Quartz grains); Color: Tan/Grey; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None; SG: 2.2-2.8.
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years in marine or terrestrial environments.
Uses & applications
Used in construction, as a decorative stone, and as a reservoir rock for groundwater and petroleum.
Geological facts
Sandstone represents about 20-25% of all sedimentary rocks. The Grand Canyon's layers are famous examples of sandstone stratigraphy.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in basins and coastal regions.
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Sandstone or Siltstone
Arenite (if sandstone)
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