Assertion: oceanic lithosphere | /r/MadeOf | ultramafic
Facets:
value: mainly
type: DEGREE
value: mantle (peridotite)
type: OTHER
Source sentences:
text: Oceanic lithosphere consists mainly of mafic crust and ultramafic mantle (peridotite) and is denser than continental lithosphere, for which the mantle is associated with crust made of felsic rocks.