The rocks are all IGNEOUS, which means that they formed by the cooling of molten lava.
(The rocks; are; all IGNEOUS) (all IGNEOUS; means; that they formed by the cooling of molten lava) Context(all IGNEOUS means,List([14, 38))):(they; formed; by the cooling of molten lava)
all IGNEOUS means,List([14, 38))
The rocks all IGNEOUS they
are means formed
all IGNEOUS
that they formed by the cooling of molten lava
by the cooling of molten lava