sedimentary
Sandstone
Arenite
Hardness: 6-7 (Mohs scale), Color: tan, grey, brown. Luster: dull to earthy. Structure: clastic/granular. Cleavage: none. Specific gravity: 2.2-2.8.
- Hardness
- 6-7 (Mohs scale), Color: tan, grey, brown
- Color
- tan, grey, brown
- Luster
- dull to earthy
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, grey, brown. Luster: dull to earthy. Structure: clastic/granular. Cleavage: none. Specific gravity: 2.2-2.8.
Formation & geological history
Formed through the accumulation of sand-sized mineral particles or rock fragments, which are then cemented together over millions of years by minerals like silica or calcium carbonate in riverbeds, deserts, or oceans.
Uses & applications
Construction (building stone, pavers), glass manufacturing (if high silica), and as a reservoir for oil and groundwater.
Geological facts
Sandstone accounts for roughly 20 to 25 percent of all sedimentary rocks on Earth. Famous formations include the Grand Canyon and Antelope Canyon.
Field identification & locations
Identify by its gritty, 'sandpaper' feel. Commonly found in river basins, quarries, and coastal cliffs. Highly common worldwide.
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