sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite or Arkose)
Hardness of 6-7 on the Mohs scale, predominantly tan, brown, yellow, red, or grey in color with visible parallel banding or bedding planes. Dull to earthy luster, granular texture, specific gravity of 2.2-2.8.
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Physical properties
Hardness of 6-7 on the Mohs scale, predominantly tan, brown, yellow, red, or grey in color with visible parallel banding or bedding planes. Dull to earthy luster, granular texture, specific gravity of 2.2-2.8.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, principally quartz and feldspar, ranging from 1/16 to 2 millimeters in diameter. Deposited in environments such as beaches, deserts, rivers, and floodplains over millions of years.
Uses & applications
Commonly used in construction as a building and paving material, dimension stone, and historically for grindstones.
Geological facts
Sandstone formations, such as Zion National Park or Petra, often showcase magnificent cross-bedding structures that reveal ancient wind or water current directions.
Field identification & locations
Easily identified in the field by its gritty, sandpaper-like texture and visible mineral grains or sedimentary layering. Found globally where ancient sedimentary basins exist.
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Sandstone or Siltstone
Arenite (if sandstone)
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Quartz pebble
Silicon dioxide (SiO2)
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
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
Siltstone / Argillite
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