sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
Hardness: 6-7 (Mohs scale), Color: tan/brown, Luster: dull/earthy, Structure: granular with visible sand-sized grains, Cleavage: none, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan/brown, Luster: dull/earthy, Structure: granular with visible sand-sized grains, Cleavage: none, Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments in environments like rivers, deserts, or marine basins. Ages vary from Precambrian to Holocene.
Uses & applications
Used widely in construction as a building material, road base, abrasive for polishing, and as an ornamental stone in landscaping.
Geological facts
Sandstone is one of the most common types of sedimentary rock and is often where groundwater and oil reservoirs are located due to its porosity.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible layers or bedding. Commonly found in coastal or desert regions and canyon systems.
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