Assertion: lithosphere's crust | /r/CapableOf | float on thick mantle
Facets:
Source sentences:
text: The model used to explain this discontinuity and the nature of volcanic materials envisions a crust of lower density siliceous and aluminous material, such as granite, floating on a thick mantle made of denser siliceous and ferromagnesian material, principally basalt–dunite–eclogite.