Breccia (/ˈbrɛtʃiə, ˈbrɛʃ-/) is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix.
It is quite possible that we are descending into an age in which two plus two will make five when the Leader says so. George Orwell, review of Power: A New Social Analysis by Bertrand Russell in The Adelphi (January 1939)
Like conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from conglomerate because the rock fragments have sharp edges that have not been worn down.