sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale. Colors range from tan, brown, yellow, red, to grey. Dull luster with a grainy, sandy texture and clastic crystal structure.
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Physical properties
Hardness of 6-7 on Mohs scale. Colors range from tan, brown, yellow, red, to grey. Dull luster with a grainy, sandy texture and clastic crystal structure.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz and feldspar, in environments like deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used in construction for building facades, paving, and flooring, as well as an aquifer reservoir rock.
Geological facts
Many famous historical monuments and ancient temples worldwide were carved directly out of sandstone cliff faces due to its workability.
Field identification & locations
Easily identified in the field by its distinct visible sand grains and sandpaper-like texture. Commonly found worldwide in desert regions and ancient river 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
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
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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