Distinctive features:  
Similar to conglomerate, but rock fragments are angular and set in fine-grained matrix. Distinguish from agglomerate (volcanic equivalent) by its sedimentary origin. 

Colour: 
Variable, depending on the type of rock fragments. 

Texture and granularity: 
Angular fragments of rock set in fine grained matrix. 

Composition: 
Fragmented rocks of any kind can form breccia. The matrix is normally fine sand or silt, cemented by secondary silica or calcite.

Field associations: 
Derived from scress and fault zones. Often found near conglomerate, arkose and sandstone.

Varieties:
Named according to rock type of which it is composed.

 

Worldwide.

 

Aggregate, ornamental when highly compacted.