Oceanic lithosphere Oceanic lithosphere consists mainly of mafic crust and ultramafic mantle -LRB- peridotite -RRB- and is denser than continental lithosphere , for which the mantle is associated with crust made of felsic rocks .

Oceanic lithosphere consists mainly of mafic crust and ultramafic mantle and is denser than continental lithosphere , for which the mantle is associated with crust made of felsic rocks .
