rock, called magma, deep within the earth becomes trapped in small pockets.
(rock; called; magma) (rock, called magma, deep within the earth; becomes; trapped in small pockets) (rock, called magma, deep within the earth; trapped; in small pockets)
rock rock, called magma, deep within the earth rock, called magma, deep within the earth
called becomes trapped
magma
trapped in small pockets
in small pockets