cataclasis

noun
cata·​cla·​sis | \ˌkatəˈklāsə̇s;kəˈtakləsə̇s, kaˈ-\
plural cataclases\ -​ˌsēz \

Definition of cataclasis 

: the crushing or fracturing of rocks and minerals during metamorphism — compare breccia, crush breccia

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History and Etymology for cataclasis

New Latin, from Greek kataklasis, from kata- cata- + klasis breaking

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