OVERTHRUST
Etymology
Noun
overthrust (plural overthrusts)
(geology, ambitransitive) A form of thrust fault from beneath a hanging wall of rock.
Verb
overthrust (third-person singular simple present overthrusts, present participle overthrusting, simple past and past participle overthrust or overthrusted)
(geology, intransitive) Of a body of rock: to force itself over another.
Adjective
overthrust (not comparable)
(geology) Belonging to earlier strata, pushed by faulting over later and higher strata.
Source: Wiktionary