sedimentary
Sandstone
Sandstone (SiO2 dominated)
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale, Color: tan to light yellowish-brown, Luster: dull to earthy, Texture: medium-grained clastic with gritty feel, Cleavage: none, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 on Mohs scale, Color: tan to light yellowish-brown, Luster: dull to earthy, Texture: medium-grained clastic with gritty feel, Cleavage: none, Specific Gravity: 2.2-2.8
Formation & geological history
Formed by the compaction and cementation of sand-sized mineral particles or rock fragments, typically composed of quartz and feldspar, deposited in desert, river, or coastal environments over millions of years.
Uses & applications
Widely used as a construction material, building stone, paving, flagstone, and ornamental stone due to its durability and ease of carving.
Geological facts
Sandstone formations account for many famous natural landmarks around the world, such as the Red Rocks of Colorado, Petra in Jordan, and Antelope Canyon in Arizona.
Field identification & locations
Identified in the field by its characteristic grainy, sand-like texture that feels like sandpaper to the touch. Commonly found in sedimentary basins, canyon walls, and riverbeds worldwide.
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