sedimentary

Sandstone

Sedimentary Clastic Rock

Hardness varies from 6 to 7 on the Mohs scale depending on cementation; colors include tan, brown, yellow, and red; dull luster; granular texture.

Identified November 12, 2026More sedimentary →

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Physical properties

Hardness varies from 6 to 7 on the Mohs scale depending on cementation; colors include tan, brown, yellow, and red; dull luster; granular texture.

Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, primarily quartz, over millions of years.

Widely used in construction as a building material, paving stone, and in the manufacturing of glass.

Sandstone formations often preserve ancient desert environments and can act as prolific aquifers for groundwater storage.

Identified by its visible sand grains and gritty texture; commonly found in desert regions, ancient riverbeds, and coastal areas.

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)