sedimentary
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
Hardness 6-7 on Mohs scale depending on cementation; grayish-brown to tan color; dull to earthy luster; granular clastic texture; specific gravity 2.2-2.8.
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Physical properties
Hardness 6-7 on Mohs scale depending on cementation; grayish-brown to tan color; dull to earthy luster; granular clastic texture; specific gravity 2.2-2.8.
Formation & geological history
Formed by the compaction and cementation of sand-sized grains of mineral, rock, or organic material over millions of years, often in ancient riverbeds, deserts, or coastal environments.
Uses & applications
Widely used as a building material, paving stone, decorative rock, and in the production of glass and abrasives.
Geological facts
Sandstone represents about 10 to 20 percent of all sedimentary rocks on Earth. Its porous nature makes it a crucial reservoir for groundwater and petroleum.
Field identification & locations
Identified by its sand-like gritty feel when rubbed. Commonly found in exposed canyon walls, river beds, and mountainous regions worldwide.
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