sedimentary

Sandstone

Sedimentary rock composed mainly of quartz and feldspar

Hardness of 6-7 on Mohs scale, colors range from tan, brown, yellow to red, dull to earthy luster, quartz grain structure, no distinct cleavage.

Identified November 1, 2026More sedimentary →

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Physical properties

Hardness of 6-7 on Mohs scale, colors range from tan, brown, yellow to red, dull to earthy luster, quartz grain structure, no distinct cleavage.

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

Commonly used in construction, paving, dimension stone, and for making glass or sandpaper.

Sandstone formations often create striking natural monuments and landmarks, such as those found in Zion and Grand Canyon national parks.

Identify by its gritty texture like sandpaper and visible sand grains; widely distributed globally 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)