sedimentary
Sandstone
Arenite
Hardness: 6-7 (Mohs scale), Color: tan, yellow, cream, Luster: dull/earthy, Crystal structure: clastic texture, Cleavage: none, Specific gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, yellow, cream, Luster: dull/earthy, Crystal structure: clastic texture, Cleavage: none, Specific gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments, typically occurring in desert, river, or coastal environments.
Uses & applications
Used extensively in construction as a building stone, in the manufacture of glass, and as a reservoir rock for oil and natural gas.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. The famous red rock formations in Sedona, Arizona and Zion National Park are composed of sandstone.
Field identification & locations
Identify in the field by its gritty, sandpaper-like feel and visible layered bedding planes. Common globally in sedimentary basins.
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Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Shale
Shale (clastic sedimentary rock)
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Cone-in-cone structure (Limestone)
Cone-in-cone structure (Secondary Sedimentary Structure)
sedimentary