fault breccia

fault breccia

Fault breccia is formed in the fault zone. They consist of angular rock fragments from rocks on either side of the fault. These angular detritus elements are usually surrounded by cements, usually calcite or siliceous, which are deposited in pores created by fragmentation caused by fault replay.
Volcanic breccia

Volcanic breccia

Volcanic breccia is a conglomerate formed by volcanic activity with angular and sub angular gravel content>50%. The diameter is generally greater than 4 millimeters, and the lava fragments contained are mostly tuff, with fewer glass fragments and whole stones. It is mainly composed of volcanic breccia with a particle size of 2-64 millimeters, and also contains breccia from other rocks and a small amount of mineral crystal fragments such as quartz and feldspar.
Volcanic breccia

Volcanic breccia

Volcanic breccia is a conglomerate formed by volcanic activity with angular and sub angular gravel content>50%. The diameter is generally greater than 4 millimeters, and the lava fragments contained are mostly tuff, with fewer glass fragments and whole stones. It is mainly composed of volcanic breccia with a particle size of 2-64 millimeters, and also contains breccia from other rocks and a small amount of mineral crystal fragments such as quartz and feldspar.