sedimentary
Sandstone
Clastic sedimentary rock
AI-generated identification · may be incorrectHardness of 6 to 7 on the Mohs scale depending on cementation, typically brown, tan, or reddish, dull earthy luster, and composed of cemented mineral grains or rock particles.
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Physical properties
Hardness of 6 to 7 on the Mohs scale depending on cementation, typically brown, tan, or reddish, dull earthy luster, and composed of cemented mineral grains or rock particles.
Formation & geological history
Formed from 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 as a construction material for building, paving, and dimension stone, as well as in manufacturing glass and abrasive tools.
Geological facts
Sandstone often preserves ancient ripple marks and fossilized tracks, providing vital clues about prehistoric environments.
Field identification & locations
Easily identified by its gritty texture and visible sand grains; commonly found in sedimentary basins and arid regions 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
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Shale
Fissile Sedimentary Rock
sedimentary
Sandstone
Arenite
sedimentary
Shale
Clastic sedimentary rock
sedimentary