Fault fracture zone

It is 2-5m wide and the limestone in this zone is broken. All rocks in this zone are in rubble shape and the rubble component is all kinds of limestone in corner angle shape or subangular shape. The diameter of big rock is about 1m and that of small one is 0.2m. All big and small rocks are mixed together. Joint fissure develops with calcareous and ferruginous cementation.