But if the igneous rocks containing the halos were formed naturally, they crystallized very slowly from molten rock called magma.
(the igneous rocks; containing; the halos) (the igneous rocks containing the halos; were formed naturally; ) (they; crystallized very slowly; from molten rock) (molten rock; called; magma)
the igneous rocks the igneous rocks containing the halos they molten rock
containing were formed naturally crystallized very slowly called
the halos
from molten rock
magma