sedimentary
Sandstone
Clastic Sedimentary Rock
AI-generated identification · may be incorrectHardness varies from 6 to 7 on the Mohs scale depending on cementation, typically displays tan, brown, yellow, or red colors with a dull earthy luster and granular texture.
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Physical properties
Hardness varies from 6 to 7 on the Mohs scale depending on cementation, typically displays tan, brown, yellow, or red colors with a dull earthy luster and granular texture.
Formation & geological history
Formed through the accumulation, compaction, and cementation of mineral particles or rock fragments, chiefly quartz and feldspar, in marine, desert, or river environments over millions of years.
Uses & applications
Widely used in construction as a building material, paving stone, and for manufacturing glass and abrasives.
Geological facts
Sandstone formations often preserve ancient desert dunes or riverbeds, providing vital clues about prehistoric climates.
Field identification & locations
Identified easily by its gritty, sandpaper-like texture and visible mineral grains, commonly found worldwide in sedimentary basins and cliffs.
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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