sedimentary

Sandstone

Sedimentary Clastic Rock

Hardness 6-7 on Mohs scale due to quartz content; color ranges from tan, brown, and yellow to red; dull or earthy luster; granular texture.

Identified November 1, 2026More sedimentary →

Get a report just like this from any photo, free.

Physical properties

Hardness 6-7 on Mohs scale due to quartz content; color ranges from tan, brown, and yellow to red; dull or earthy luster; granular texture.

Formed by the accumulation, compaction, and cementation of mineral particles or rock fragments, mostly quartz and feldspar, over millions of years.

Widely used in construction for building stone, paving, and making glass, as well as a reservoir rock for petroleum and water.

Sandstone formations often preserve ancient desert or river environments and can exhibit distinct cross-bedding layers.

Identify by visible sand grains and gritty texture; commonly found in deserts, riverbeds, and mountainous sedimentary regions worldwide.

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)