sedimentary
Sandstone (Yellow/Tan Sandstone)
Arenite (primarily Quartz, SiO2)
Hardness: 6-7 (Mohs scale), Color: tan, yellow, buff; Luster: matte/dull; Crystal structure: granular/clastic; Cleavage: none (breaks across grains); Specific gravity: 2.0-2.6
- Hardness
- 6-7 (Mohs scale), Color: tan, yellow, buff
- Color
- tan, yellow, buff
- Luster
- matte/dull
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, buff; Luster: matte/dull; Crystal structure: granular/clastic; Cleavage: none (breaks across grains); Specific gravity: 2.0-2.6
Formation & geological history
Formed through the accumulation, compaction, and lithification of sand-sized mineral particles or rock fragments. Typically deposited in riverbeds, deserts, or coastal environments over millions of years.
Uses & applications
Widely used in construction for grindstones, building facades, and paving; also used as an aquifer for groundwater and an industrial source of silica sand for glassmaking.
Geological facts
Sandstone captures a 'snapshot' of ancient history; cross-bedding within sandstone layers can reveal the direction of wind or water currents from millions of years ago.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible sand grains. Commonly found in canyons, river valleys, and sedimentary basins worldwide.
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