The magma begins to cool and crystallise, allowing the more dense metal oxide minerals and some sulfide minerals to sink to the bottom of the magma chamber, where they form layers.
(The magma; begins; ) (they; form; layers) (The magma; to cool; ) (The magma; to crystallise; the more dense metal oxide minerals and some sulfide minerals) (The magma; allowing; )
The magma they The magma The magma The magma
begins form to cool to crystallise allowing
layers
the more dense metal oxide minerals and some sulfide minerals