sedimentary
Sandstone
Arenite (SiO2 based)
Hardness: 6-7 (Mohs scale), Color: tan, yellow, or grey, Luster: dull/earthy, Structure: clastic texture with visible sand grains, Cleavage: none.
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, or grey, Luster: dull/earthy, Structure: clastic texture with visible sand grains, Cleavage: none.
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments, usually in environments like beaches, deserts, or river beds over millions of years.
Uses & applications
Commonly used as a building material, in paving, for glass manufacture (if high quartz content), and as an aquifer in geology.
Geological facts
Sandstone makes up about 10-20% of Earth's sedimentary rocks. Famous landmarks like the Grand Canyon and Petra are primarily composed of sandstone.
Field identification & locations
Identify in the field by its gritty texture (feels like sandpaper) and visible layers or bedding. Found worldwide in sedimentary basins.
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Brown Sandstone (River Rock)
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