Rock Identifier
Conglomerate (Clastic Sedimentary Rock) — sedimentary
sedimentary

Conglomerate

Clastic Sedimentary Rock

AI-generated identification · may be incorrect

Hardness varies by matrix and clasts (Mohs 6-7 for quartz pebbles), colors are multicolored, dull luster, poorly sorted rounded fragments cemented together.

Identified More sedimentary →
Explore Conglomerate in the encyclopedia →

Identify your own rocks.

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

Physical properties

Hardness varies by matrix and clasts (Mohs 6-7 for quartz pebbles), colors are multicolored, dull luster, poorly sorted rounded fragments cemented together.

Formation & geological history

Formed by the consolidation of rounded gravel and pebbles in high-energy environments like fast-flowing rivers or beach zones.

Uses & applications

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

Geological facts

Often referred to as puddingstone due to its appearance resembling rounded fruits suspended in pudding.

Field identification & locations

Identified easily by visible rounded pebbles embedded in a finer-grained matrix; commonly found in ancient alluvial deposits worldwide.