sedimentary
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
Hardness: 6-7 (Mohs scale), Color: tan, yellow, or earthy brown, Luster: dull/earthy, Crystal structure: granular/clastic, Cleavage: none, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, or earthy brown, Luster: dull/earthy, Crystal structure: granular/clastic, 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, often in marine or river environments during various geological eras.
Uses & applications
Used primarily as a construction material (dimension stone), in glass manufacturing, or as a decorative garden stone. Low value for common specimens.
Geological facts
Sandstone constitutes about 20% of all sedimentary rocks on Earth. Fossiliferous varieties can contain impressions of shells or plants from millions of years ago.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grain structure. Look for it in outcrop cliffs, riverbeds, and coastal regions.
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