sedimentary
Sandstone
Clastic Sedimentary Rock
Hardness: 6-7 on Mohs scale (depending on cement); Color: Tan, brown, yellow, red, grey, pink; Luster: Dull to earthy; Crystal Structure: Clastic, composed of quartz and feldspar grains; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 on Mohs scale (depending on cement)
- Color
- Tan, brown, yellow, red, grey, pink
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 on Mohs scale (depending on cement); Color: Tan, brown, yellow, red, grey, pink; Luster: Dull to earthy; Crystal Structure: Clastic, composed of quartz and feldspar grains; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, usually quartz and feldspar, in environments such as deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used in construction, building stone, paving, glassmaking, and abrasive materials.
Geological facts
Sandstone can absorb water and act as an aquifer to store groundwater. Many famous ancient monuments, including Petra and parts of the Egyptian temples, are carved out of sandstone formations.
Field identification & locations
Easily identified by its gritty texture, visible sand grains, and often layered bedding planes. Common worldwide in sedimentary basins and desert regions.
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