The rocks containing KREEP are believed to have formed at the crust&#173;mantle boundary during the final stages of magma-ocean differentiation.
(The rocks; containing; KREEP) (The rocks containing KREEP; are believed; ) (The rocks containing KREEP; to have formed; L:at the crust&#173; mantle boundary during the final stages of magma-ocean differentiation)
The rocks The rocks containing KREEP The rocks containing KREEP
containing are believed to have formed
KREEP
L:at the crust&#173 mantle boundary during the final stages of magma-ocean differentiation