[kat-uh-kley-sis, kuh-tak-luh-sis]
noun Petrology.
a process of deformation or metamorphism in which the grains of a rock are fractured and rotated.

< Greek katáklasis refraction, equivalent to katakla-, stem of kataklân to break off, refract, break down (kata- cata- + klân to break) + -sis -sis; compare Norwegian kataklasstruktur (1885)

cataclastic [kat-uh-klas-tik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
cataclasis (ˌkætəˈkleɪsɪs)
n , pl -ses
geology the deformation of rocks by crushing and shearing
[C19: New Latin, from Greek, from cata- + klasis a breaking]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
cataclastic   (kāt'ə-klās'tĭk)  Pronunciation Key 
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.
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