sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Hardness 6-7 on Mohs scale, colors range from tan, brown, yellow to red, dull to earthy luster, quartz mineral grains cemented together.

Identified November 1, 2026More sedimentary →

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Physical properties

Hardness 6-7 on Mohs scale, colors range from tan, brown, yellow to red, dull to earthy luster, quartz mineral grains cemented together.

Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, typically in desert, river, or marine environments.

Widely used in construction as a building material, dimension stone, paving, and in glassmaking.

Sandstone formations can store vast amounts of groundwater and petroleum, acting as natural aquifers and reservoirs.

Easily identified by its gritty, sandpaper-like texture and visible mineral grains, commonly found worldwide in sedimentary basins.

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

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Sandstone or Siltstone

Arenite (if sandstone)

Sandstone

Arenite

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)