cataclastic

noun Petrology.

1. a process of deformation or metamorphism in which the grains of a rock are fractured and rotated.

noun plural -ses (-siːz)

1. geology the deformation of rocks by crushing and shearing

1. Relating to rocks consisting of cemented fragments that originate from the mechanical breakdown of rock associated with plate tectonic processes. Cataclastic rocks form in regions that have undergone intense metamorphism and are associated with other metamorphic features such as folds and faults. They typically contain bent, broken, and granular minerals.