sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
Hardness of 6-7 on the Mohs scale, typically brown, tan, yellow, or red in color, dull to earthy luster, composed mainly of quartz sand grains cemented together, specific gravity around 2.2-2.8.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically brown, tan, yellow, or red in color, dull to earthy luster, composed mainly of quartz sand grains cemented together, specific gravity around 2.2-2.8.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz, in environments such as deserts, rivers, and beaches over millions of years.
Uses & applications
Used widely in construction as building stone, paving material, and in the manufacturing of glass and abrasives.
Geological facts
Sandstone formations can store large amounts of water, serving as important aquifers. Famous structures like Petra in Jordan are carved directly into sandstone cliffs.
Field identification & locations
Identified by its gritty texture, visible sand-sized grains, and often layered appearance. Commonly found worldwide in sedimentary basins and arid regions.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary