Definition of brecciation in US English:

brecciation

noun

Geology
  • The process of breaking down rock into angular fragments.

    ‘hydraulic fracturing gave rise to brecciation of the banded rocks’

Origin

Late 19th century: from breccia + -ation.

Pronunciation

brecciation

/ˌbre(t)SHēˈāSHən//ˌbrɛ(t)ʃiˈeɪʃən/