Rock Identifier
Conglomerate (Polymictic Conglomerate) — sedimentary
sedimentary

Conglomerate

Polymictic Conglomerate

AI-generated identification · may be incorrect

Hardness of 6-7 on the Mohs scale, featuring rounded pebbles and cobbles cemented in a finer-grained matrix. Varies in color from red and brown to gray, with a vitreous to dull luster.

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 of 6-7 on the Mohs scale, featuring rounded pebbles and cobbles cemented in a finer-grained matrix. Varies in color from red and brown to gray, with a vitreous to dull luster.

Formation & geological history

Formed by the consolidation and cementation of gravel-sized clasts, typically in high-energy environments like fast-flowing rivers or beach zones.

Uses & applications

Used primarily as crushed stone for construction, road aggregate, and occasionally polished for decorative ornamental use.

Geological facts

Conglomerates provide direct evidence of past high-energy transport environments, revealing the climate and geography of ancient landscapes.

Field identification & locations

Easily identified in the field by its distinct 'plum-pudding' texture of rounded gravel embedded in a finer matrix, commonly found in riverbeds and mountainous sedimentary formations.