sedimentary

Conglomerate

Sedimentary Conglomerate

Variable hardness (typically 6-7 depending on clasts), multicolored with rounded pebbles cemented together, dull luster, clastic texture.

Identified November 15, 2026More sedimentary →

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Physical properties

Variable hardness (typically 6-7 depending on clasts), multicolored with rounded pebbles cemented together, dull luster, clastic texture.

Formed by the consolidation and cementation of gravel-sized rounded clasts in high-energy environments like rivers or beaches.

Used primarily as crushed stone for construction, road aggregate, and occasionally as decorative facing stone.

Conglomerates are often called puddingstone due to their appearance resembling pebbles suspended in a matrix.

Identified easily by visible rounded pebbles or gravel cemented in a finer matrix; found worldwide 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

Sandstone or Siltstone

Arenite (if sandstone)

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Shale

Fissile Sedimentary Rock

Sandstone

Arenite

Shale

Clastic sedimentary rock