sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Hardness varies from 6 to 7 depending on cementation (due to quartz grains); colors range from tan, brown, yellow, red, to grey; dull or earthy luster; clastic crystal/grain structure; specific gravity typically 2.2 to 2.8.
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Physical properties
Hardness varies from 6 to 7 depending on cementation (due to quartz grains); colors range from tan, brown, yellow, red, to grey; dull or earthy luster; clastic crystal/grain structure; specific gravity typically 2.2 to 2.8.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, most commonly quartz and feldspar, deposited by water, wind, or ice in environments such as deserts, rivers, and beaches. Can span various geological ages.
Uses & applications
Widely used in construction as building stone, paving material, and in the manufacturing of glass and abrasives.
Geological facts
Sandstone is porous and permeable, making it an excellent natural aquifer for storing groundwater and petroleum.
Field identification & locations
Easily identified by its gritty texture resembling sandpaper and visible grains or bedding planes. Found worldwide in deserts, canyons, and coastal regions.
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Arenite (if sandstone)
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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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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Banded Siltstone / Mudstone Pebble
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