sedimentary
Sandstone
Clastic sedimentary rock
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale depending on cementation, colors range from tan to red, dull luster, quartz-rich composition.
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Physical properties
Hardness 6-7 on Mohs scale depending on cementation, colors range from tan to red, dull luster, quartz-rich composition.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in desert, river, or marine environments.
Uses & applications
Widely used in construction, dimension stone, paving, and as an aquifer reservoir rock.
Geological facts
Sandstone formations like Zion National Park showcase spectacular cross-bedding patterns created by ancient wind-blown dunes.
Field identification & locations
Identify by visible sand-sized grains and gritty texture; common worldwide in sedimentary basins and escarpments.
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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
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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)
sedimentary