sedimentary
Sandstone
Sedimentary quartz arenite
AI-generated identification · may be incorrectMohs hardness of 6-7, typically brown, tan, or reddish with a granular texture and dull luster.
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Physical properties
Mohs hardness of 6-7, typically brown, tan, or reddish with a granular texture and dull luster.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz.
Uses & applications
Commonly used in construction as building stone, paving material, and in the manufacture of glass.
Geological facts
Sandstone formations can act as aquifers for groundwater and are famous for preserving ancient fossils.
Field identification & locations
Identified by its visible sand grains and gritty texture; found worldwide in deserts, riverbeds, and ancient marine basins.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
fossil
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
Arenite
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Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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