sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand
Hardness: 6-7 on Mohs scale, Color: Varies from white, yellow, red, to brown, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains or rock fragments), Specific gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 on Mohs scale, Color: Varies from white, yellow, red, to brown, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains or rock fragments), Specific gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, most commonly quartz and feldspar, in environments such as beaches, deserts, and riverbeds over millions of years.
Uses & applications
Used extensively in construction as building stone, paving material, and in the manufacture of glass and concrete.
Geological facts
Sandstone is porous, which allows it to store large quantities of water, oil, and natural gas, making it a critical reservoir rock in geology.
Field identification & locations
Easily identifiable by its sandy texture and visible grains. Found worldwide in regions with ancient sedimentary basins, deserts, and coastal areas.
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