sedimentary
Sandstone (likely Conglomerate or Gritstone)
Arenite (SiO2 based)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: tan, grey, yellow, Luster: dull/earthy, Crystal structure: granular clastic, Cleavage: none, SG: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, grey, yellow, Luster: dull/earthy, Crystal structure: granular clastic, Cleavage: none, SG: 2.2-2.8
Formation & geological history
Formed by the accumulation and cementation of mineral particles or rock fragments (clasts) in river beds, beaches, or desert environments over millions of years.
Uses & applications
Used in construction, as a building stone, in glass manufacturing, and as a reservoir rock for oil and natural gas.
Geological facts
Sandstone represents about 20-25 percent of all sedimentary rocks on Earth and often preserves fossils and ripple marks from ancient environments.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible grains. Often found in outcrops where ancient water bodies once existed.
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Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary