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Definition of breccia

A coarse-grained clastic rock, composed of angular broken rock fragments held together by a mineral cement or in a fine-grained matrix; it differs from conglomerate in that the fragments have sharp edges and unworn corners. Breccia may originate as a result of talus accumulation, explosive igneous processes, collapse of rock material, or faulting. Etymol: Italian, broken stones, rubble.

Portugal

Synonym of: rubblerock, brecciated

Compare with: conglomerate, loose ground

Ref: AGI

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