Ophiolite

An ophiolite ( /ˈɒfiəlaɪt/) is a section of the Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea level and often emplaced onto continental crustal rocks. Ophio- is Greek for "snake" (ὄφις), -lite means "stone" from the Greek lithos (λίθος), after the often green-colored rocks (spilites and serpentinites) that make up many ophiolites.