sedimentary
Sandstone
Clastic Sedimentary Rock (Quartz arenite or similar)
Hardness varies from 6 to 7 depending on cement; Color ranges from tan, brown, yellow, red, grey, to pink; Luster is dull to earthy; Crystal structure is clastic, composed of cemented mineral particles or rock fragments ranging in size from 0.0625 mm to 2 mm.
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Physical properties
Hardness varies from 6 to 7 depending on cement; Color ranges from tan, brown, yellow, red, grey, to pink; Luster is dull to earthy; Crystal structure is clastic, composed of cemented mineral particles or rock fragments ranging in size from 0.0625 mm to 2 mm.
Formation & geological history
Formed by the accumulation, compaction, and cementation (lithification) of mineral particles or rock fragments, most commonly quartz and feldspar, typically deposited in environments like deserts, rivers, and beaches over millions of years.
Uses & applications
Commonly used in construction, building facades, paving stones, flagstones, and historically as grindstones for sharpening tools.
Geological facts
Sandstone layers can store vast amounts of groundwater and petroleum, making them crucial reservoirs for hydrogeologists and the oil and gas industry.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible sand grains. Found worldwide in sedimentary basins and exposed cliff faces.
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