sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
Hardness: 6-7 (Mohs scale), Color: tan to light brown, Luster: dull/earthy, Crystal structure: granular clastic texture, Cleavage: none, Specific gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan to light brown, Luster: dull/earthy, Crystal structure: granular clastic texture, Cleavage: none, Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments. Occurs in diverse environments including deserts, river beds, and beaches. Age can vary from modern to billions of years old.
Uses & applications
Used widely as a construction material (dimension stone), in the manufacture of glass, and for decorative masonry.
Geological facts
Sandstone makes up about 20-25% of all sedimentary rocks on Earth. It is a major reservoir for water (aquifers) and fossil fuels due to its porosity.
Field identification & locations
Identify in the field by its 'sandpaper' feel when rubbed and the visible presence of small, uniform grains. It is extremely common in dry, canyon-rich environments like the American Southwest.
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