what breccia is used for
Earth material Sedimentary rock Clastic rock. Sedimentary breccia. A breccia (coarse-grained clastic rock composed of angular broken rock fragments held together by a mineral cement or a fine-grained matrix) formed by sedimentary processes. This category is also used for breccia.arth material Sedimentary rock Clastic rock. Sedimentary breccia. A breccia (coarse-grained clastic rock composed of angular broken rock fragments held together by a mineral cement or a fine-grained matrix) formed by sedimentary processes. This category is also used for breccia.