It is more closely related chemically to obsidian, granite and other igneous or volcanic rocks.
(It; is; more closely related chemically to obsidian, granite and other igneous or volcanic rocks) (It; more closely related chemically; to obsidian, granite and other igneous or volcanic rocks)
It It
is more closely related chemically
more closely related chemically to obsidian, granite and other igneous or volcanic rocks
to obsidian, granite and other igneous or volcanic rocks