sedimentary

Sandstone

Sedimentary rock composed mainly of quartz sand

Hardness 6-7 on Mohs scale, colors range from tan and brown to red and yellow, dull to earthy luster, clastic texture.

Identified October 21, 2026More sedimentary →

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Physical properties

Hardness 6-7 on Mohs scale, colors range from tan and brown to red and yellow, dull to earthy luster, clastic texture.

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

Commonly used in construction, building facades, paving, and as an aquifer reservoir rock for groundwater and petroleum.

Famous structures like Petra and the Uluru monolith are carved from or composed of sandstone.

Identified by its gritty texture and visible sand grains; found worldwide in sedimentary basins and geological formations.

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)