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EnglishEdit

EtymologyEdit

down- +‎ fault

NounEdit

downfault (plural downfaults)

  1. (geology) A graben (area sunken relative to surrounding land).

VerbEdit

downfault (third-person singular simple present downfaults, present participle downfaulting, simple past and past participle downfaulted)

  1. (geology) To form a fault that is sunken relative to the surrounding land.