sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, typically brown, tan, or reddish, dull luster, clastic texture with visible sand grains.
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Physical properties
Hardness 6-7 on Mohs scale, typically brown, tan, or reddish, dull luster, clastic texture with visible sand grains.
Formation & geological history
Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, mostly quartz, in marine, desert, or river environments.
Uses & applications
Widely used in construction as a building material, paving stone, and in the manufacture of glass.
Geological facts
Famous monuments worldwide, including the Petra treasury in Jordan, are carved directly out of massive sandstone cliffs.
Field identification & locations
Identify by its gritty texture like sandpaper and visible interlocking sand grains; found globally in ancient depositional 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
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