Columbia subject headings:
Earth (Planet)--Mantle.
Harvard subject headings:
Basalt--Congresses.
Basalt--Inclusions.
Continents--Congresses.
Earth (Planet)--Mantle--Congresses.
Earth (Planet)--Mantle.
Igneous rocks--Inclusions--Congresses.
Princeton subject headings:
Basalt.
Earth--Mantle.