sedimentary
Sandstone
Sedimentary Clastic Rock
Hardness varies from 6 to 7 on the Mohs scale depending on cementation; color ranges from brown, tan, yellow, red, to gray; dull or earthy luster; composed mostly of quartz and feldspar grains; no distinct cleavage.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on cementation; color ranges from brown, tan, yellow, red, to gray; dull or earthy luster; composed mostly of quartz and feldspar grains; no distinct cleavage.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, typically quartz, in environments like deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used in construction as building stone, paving material, and in the manufacturing of glass and concrete.
Geological facts
Many of the world's most famous monuments and ancient temples, including parts of Petra, are carved directly out of massive sandstone formations.
Field identification & locations
Easily identified in the field by its distinct gritty texture, visible sand grains, and layered bedding planes. Found worldwide.
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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