These are the rocks that form at erupting volcanoes and oozing fissures.
(These; are; the rocks that form at erupting volcanoes and oozing fissures) (the rocks; form; L:at erupting volcanoes and oozing fissures)
These the rocks
are form
the rocks that form at erupting volcanoes and oozing fissures
L:at erupting volcanoes and oozing fissures