sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Hardness: 6-7 on Mohs scale (depending on cementation), Color: Tan, brown, reddish-brown, yellow, or grey, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains and rock fragments cemented together), Cleavage: None
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Physical properties
Hardness: 6-7 on Mohs scale (depending on cementation), Color: Tan, brown, reddish-brown, yellow, or grey, Luster: Dull to earthy, Crystal structure: Clastic (composed of mineral grains and rock fragments cemented together), Cleavage: None
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz and feldspar, in environments such as beaches, deserts, rivers, and floodplains over millions of years.
Uses & applications
Widely used in construction as building stone, dimension stone, paving material, and in the manufacture of glass and abrasives.
Geological facts
Sandstone often preserves ripple marks and cross-bedding from ancient water or wind currents, providing geologists with clues about prehistoric environments.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible sand grains. Found worldwide in sedimentary basins and escarpments.
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Arenite (if sandstone)
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
Silicon dioxide (SiO2)
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary