a widespread rock formation containing a mixture of sedimentary, igneous, and metamorphic rocks, thought to be the result of sea-floor rifting or crustal plate collisions
See ophiolite in American Heritage Dictionary 4
(ŏfˈē-ə-lītˌ, ōˈfē-)
noun
Any of a group of igneous and metamorphic rocks found within the continental crust, thought to be formed by the uplift of oceanic crust and mantle into the continental crust.