Breccia

Breccia ( ; Italian:; Italian for 'breach') is a clastic rock composed of angular, coarse^ fragments bound by a finer-grainedmatrix and/or cement.

The word has its origins in the Italian language, in which it means 'rubble'. A breccia may have a variety of different origins, as indicated by the named types including sedimentary breccia, fault or tectonic breccia, igneous breccia, impact breccia, and hydrothermal breccia.

A megabreccia is a breccia composed of very large rock fragments, sometimes kilometers across, which can be formed by landslides, impact events, or caldera collapse.