sedimentary

Red Sandstone

Quartzose Sandstone (Siliciclastic sedimentary rock)

Hardness of 6-7 on the Mohs scale, reddish-brown color due to iron oxide cement, dull to vitreous luster, clastic texture with visible quartz grains.

Identified October 17, 2026More sedimentary →

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Physical properties

Hardness of 6-7 on the Mohs scale, reddish-brown color due to iron oxide cement, dull to vitreous luster, clastic texture with visible quartz grains.

Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, often in desert or fluvial environments.

Widely used in construction, architectural building facades, paving, and landscaping.

The vibrant red color is caused by hematite coatings on the quartz grains acting as a natural cement.

Easily identified by its gritty texture and distinct bedding planes; common in sedimentary basins 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)