( ( ( Partial melting ) ( of ( subducted ( oceanic crust ) ) ) ) ( ( can ( ( produce ( andesitic volcanism ) ) ( at ( ocean-ocean ( and ( ocean-continent ( plate margins ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Partial) (NN melting)) (PP (IN of) (NP (JJ subducted) (JJ oceanic) (NN crust)))) (VP (MD can) (VP (VB produce) (NP (JJ andesitic) (NN volcanism)) (PP (IN at) (NP (NN ocean-ocean) (CC and) (JJ ocean-continent) (NN plate) (NNS margins))))) (. .)))
Partial melting of subducted oceanic crust can produce andesitic volcanism at ocean-ocean and ocean-continent plate margins.
(ROOT (S (NP (NP (DT The) (NN creation) (CC and) (NN destruction)) (PP (IN of) (NP (JJ oceanic) (NN crust)))) (VP (VBZ is) (NP (DT the) (NN reason) (NN continents) (NN move))) (. .)))