sedimentary

Red Sandstone

Quartz arenite / Lithic sandstone

Hardness of 6-7 on Mohs scale. Varies in color from pink to deep red due to iron oxide cement. Dull to earthy luster with clastic texture.

Identified October 19, 2026More sedimentary →

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Physical properties

Hardness of 6-7 on Mohs scale. Varies in color from pink to deep red due to iron oxide cement. Dull to earthy luster with clastic texture.

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

Widely used as a building and paving material in construction and architecture.

The characteristic red color comes from iron oxide coatings on the quartz grains, often indicating ancient arid terrestrial conditions.

Easily identified by its visible sand grains and gritty texture. Found globally in sedimentary basins and desert regions.

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)