斷層運動使兩側原來的岩可破碎、重結晶、礦物定各排列等一系列新形成的岩石。角礫岩是岩石在斷層上由壓碎、破碎等作用或斷層壁之間摩擦產生。按其形狀及排列方式可再分為張裂角礫岩及壓碎角礫岩

Fault breccias are tectonites formed primarily by tectonic movement along a localized zone of brittle deformation (a fault zone) in a rock formation or province.

The grinding and milling occurring when the two sides of the fault zone moving along each other results in a material that is made of loose fragments. Breccia is friction between the rocks on the fault by crushing, crushing and other effects or faults wall. Their shape and arrangement can be further divided into rifting breccias and breccia crushed

由粒徑大於2亳米的圓狀、次圓狀、棱角狀岩石碎屑（礫石）經膠結而成的。顏色變化取決於碎屑和基質組合物。硬度是可變的，這取決於碎屑成分和水泥的強度。它反映了母岩成分和性質，可用它判斷構造運動、古海、湖岸的位置及古河流的流向。斷層角礫岩較雜，斷層兩側不同岩層的岩石角礫不均，離斷裂面愈近角礫愈細。

Fault breccia has no cohesion, it is normally an unconsolidated rock type, unless cementation took place at a later stage. By particle larger than 2mm of rounded, sub-rounded, angular rock fragments (gravel) made ​​by cementation. Colour change depends on clast and matrix composition. Hardness is variable. It depends on clast composition and strength of cement. It reflecting the composition and nature of the rock, and can be determine the flow of tectonic movement, the ancient sea, shore location and ancient rivers. Fault breccia more complex, different sides of the fault breccia rock formations uneven fracture surface from the closer the more fine brecciated

這些角礫岩作為建築石材為室內建築膠合板，瓷磚，窗台裝飾等應用。裝飾石材，瓷磚，墓碑，紀念碑，珠寶，含水層，天然氣和油氣藏。

Breccia is used as a trade name for a group of dimension stone products with a broken, angular pattern. Names such as “Breccia Oniciata”, “Breccia Pernice” and “Breccia Damascata” are cut and polished limestones and marbles that reveal a broken, angular pattern. These breccias are used as architectural stones for interior building veneers, tiles, window sills and other decorative applications. These are proprietary names applied to the rock from specific quarries. Also use for decorative stones, tiles, tombstones, monuments, jewelry, aquifers, natural gas and petroleum reservoirs

上坡，在石英片岩瓦礫。通常在北美發現。

gossan fault breccia occurs uphill, in quartz schist rubble. Usually found in North American .