an assemblage of mafic and ultramafic rock fragments of the ocean lithosphere that has been tectonically moved onto a continental margin or island
A suite of mafic and ultramafic rocks and associated marine cherts and their metamorphic equivalents
A sequence of rocks characterized by ultramafic rocks at the base and (in ascending order) gabbro, sheeted dikes, pillow lavas, and deep-sea sediments The typical sequence of rocks constituting the oceanic crust We see ophiolites when they have been abducted onto the edge of continental crust