sedimentary
Sandstone
Sedimentary Rock
AI-generated identification · may be incorrectHardness varies from 6 to 7 on the Mohs scale depending on cementation, typically tan, brown, or reddish in color, with a dull luster and clastic texture.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on cementation, typically tan, brown, or reddish in color, with a dull luster and clastic texture.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, over millions of years in marine, desert, or river environments.
Uses & applications
Widely used in construction as building stone, paving material, and for making glass and concrete.
Geological facts
Sandstone formations often preserve ancient ripple marks and dinosaur footprints, providing a clear record of prehistoric environments.
Field identification & locations
Easily identified by its gritty, sandpaper-like texture and visible mineral grains, commonly found in sedimentary basins worldwide.
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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)
Sedimentary
Sandstone
Arenite
sedimentary
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary