sedimentary
Sandstone
Sedimentary Rock (Quartz Arenite)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, typically brown, tan, or reddish in color with a dull to earthy luster. Composed primarily of quartz grains with a clastic texture and no notable cleavage.
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Physical properties
Hardness of 6-7 on the Mohs scale, typically brown, tan, or reddish in color with a dull to earthy luster. Composed primarily of quartz grains with a clastic texture and no notable cleavage.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, in marine, desert, or river environments over millions of years.
Uses & applications
Widely used in construction as a building material, for paving stones, and historically for grinding stones and whetstones.
Geological facts
Sandstone formations can store vast amounts of groundwater and petroleum, making them crucial reservoirs for hydrogeology and the oil industry.
Field identification & locations
Easily identified in the field by its visible granular texture that feels like sandpaper. It is found worldwide in sedimentary basins and ancient depositional environments.
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Other sedimentary specimens
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
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary