sedimentary
Sandstone
Arenite (SiO2 principal)
AI-generated identification · may be incorrectHardness: 6-7 (individual grains); Color: Tan, beige, light brown; Luster: Dull, earthy; Crystal structure: Granular clastic; Specific gravity: 2.2-2.8
- Hardness
- 6-7 (individual grains)
- Color
- Tan, beige, light brown
- Luster
- Dull, earthy
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Physical properties
Hardness: 6-7 (individual grains); Color: Tan, beige, light brown; Luster: Dull, earthy; Crystal structure: Granular clastic; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the cementation of sand-sized mineral particles or rock fragments. Typically deposited in environments like deserts, river deltas, or beaches over millions of years.
Uses & applications
Primary use in construction as a building material, decorative paving, and as a reservoir rock for oil and natural gas in the energy sector.
Geological facts
Sandstone can be very porous, acting as a natural filter and aquifer for water. It often preserves fossils and ripple marks from ancient environments.
Field identification & locations
Identify in the field by its gritty, sandpaper-like texture. Commonly found in canyons, cliffs, and sedimentary basins. If it scratches glass, it contains high quartz content.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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